BCBS Prefix – IAA to IZZ
| BC:Blue-Cross-BS:Blue-Shield Company List | IAA to IZZ – BCBS Prefix List 2024 | Provider Phone Number |
|---|---|---|
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | IAA BCBS Prefix | WisconsinBCBS-Phonelist |
| Prefix-un-assigned | IAB BCBS Prefix | Not applicable |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | IAC BCBS Prefix | BCBSRegence:800 253 0838 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Indiana | IAD BCBS Prefix | IndianaBluecross-Blueshield-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IAE BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Prefix-un-assigned | IAF BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IAG BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IAH BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Prefix-un-assigned | IAI BCBS Prefix | Not applicable |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IAJ BCBS Prefix | BCBSCarefirst-phonelist |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IAK BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IAL BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IAM BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Prefix-un-assigned | IAN BCBS Prefix | Not applicable |
| Prefix-un-assigned | IAO BCBS Prefix | Not applicable |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IAP BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Prefix-un-assigned | IAQ BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Alabama | IAR BCBS Prefix | ALBCBS: 205 220 6899 |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | IAS BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| Empire BC:Blue-Cross-BS:Blue-Shield of Newyork | IAT BCBS Prefix | NYBCBSEmpire:800 992 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Nebraska | IAU BCBS Prefix | NE-BCBS:800 635 0579 NE-MedicareBCBS: 888 505 2022 NE-FEPBCBS: 800 223 5584 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IAV BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IAW BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Prefix-un-assigned | IAX BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IAY BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Prefix-un-assigned | IAZ BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Illinois | IBA BCBS Prefix | IllinoisBCBS:800 972 8088 ILBCBS-Phonelist |
| Horizon BC:Blue-Cross-BS:Blue-Shield of NJ | IBB BCBS Prefix | NewJerseyBCBS:800 624 1110 NJBCBS-phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | IBC BCBS Prefix | WisconsinBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | IBD BCBS Prefix | WisconsinBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Illinois | IBE BCBS Prefix | IllinoisBCBS:800 972 8088 ILBCBS-Phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IBF BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Prefix-un-assigned | IBG BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Alabama | IBH BCBS Prefix | ALBCBS: 205 220 6899 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IBI BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IBJ BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IBK BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Independence Blue-cross of Philadelphia and South-eastern PA | IBL BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IBM BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Prefix-un-assigned | IBN BCBS Prefix | Not applicable |
| Independence Blue-cross of Philadelphia and South-eastern PA | IBO BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IBP BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | IBQ BCBS Prefix | BCBSRegence:800 253 0838 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IBR BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IBS BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Illinois | IBT BCBS Prefix | IllinoisBCBS:800 972 8088 ILBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Alabama | IBU BCBS Prefix | ALBCBS: 205 220 6899 |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | IBV BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Illinois | IBW BCBS Prefix | IllinoisBCBS:800 972 8088 ILBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield-California-Bluecross | IBX BCBS Prefix | CaliforniaBCBS: 800 677 6669 CABCBS-Phonelist |
| Prefix-un-assigned | IBY BCBS Prefix | Not applicable |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | IBZ BCBS Prefix | BCBSRegence:800 253 0838 |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | ICA BCBS Prefix | BCBSCarefirst-phonelist |
| Prefix-un-assigned | ICB BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Colorado | ICC BCBS Prefix | Bluecross-Blueshield:(800) 282 4548 ColoradoBluecross-Blueshield-Phonelist |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | ICD BCBS Prefix | BCBSCarefirst-phonelist |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | ICE BCBS Prefix | BCBSCarefirst-phonelist |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | ICF BCBS Prefix | BCBSCarefirst-phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | ICG BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | ICH BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| Floridablue | ICI BCBS Prefix | BCBSFL:800 955 5692 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | ICJ BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | ICK BCBS Prefix | BCBSCarefirst-phonelist |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | ICL BCBS Prefix | BCBSCarefirst-phonelist |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | ICM BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | ICN BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of North Carolina | ICO BCBS Prefix | NC-BCBS:800 214 4844 NCBluemedicare:888 296 9790 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | ICP BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Prefix-un-assigned | ICQ BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | ICR BCBS Prefix | OhioBCBS-Phonelist |
| Prefix-un-assigned | ICS BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Western New York | ICT BCBS Prefix | WNYHighmarkBCBS:800950 0051 WNYfederal:877 327 1395 WNY-FEP-BCBS:800 234 5082 |
| Prefix-un-assigned | ICU BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | ICV BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | ICW BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| Prefix-un-assigned | ICX BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | ICY BCBS Prefix | OhioBCBS-Phonelist |
| Prefix-un-assigned | ICZ BCBS Prefix | Not applicable |
| BC of Idaho -Blue-Cross | IDA BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| Floridablue | IDB BCBS Prefix | BCBSFL:800 955 5692 |
| Prefix-un-assigned | IDC BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IDD BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| BC of Idaho -Blue-Cross | IDE BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| BC of Idaho -Blue-Cross | IDF BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| Prefix-un-assigned | IDG BCBS Prefix | Not applicable |
| Prefix-un-assigned | IDH BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IDI BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IDJ BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| Empire BC:Blue-Cross-BS:Blue-Shield of Newyork | IDK BCBS Prefix | NYBCBSEmpire:800 992 2583 |
| BC of Idaho -Blue-Cross | IDL BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| BC of Idaho -Blue-Cross | IDM BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| BC of Idaho -Blue-Cross | IDN BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| BC:Blue-Cross-BS:Blue-Shield of Kansas | IDO BCBS Prefix | KansasBCBS:800 432 3990 KansasF.E.P BCBS: 800 432 0379 |
| BC of Idaho -Blue-Cross | IDP BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IDQ BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| BC:Blue-Cross-BS:Blue-Shield-California-Bluecross | IDR BCBS Prefix | CaliforniaBCBS: 800 677 6669 CABCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Kansas City | IDS BCBS Prefix | KansasBCBS:800 432 3990 KansasF.E.P BCBS: 800 432 0379 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IDT BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | IDU BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| Prefix-un-assigned | IDV BCBS Prefix | Not applicable |
| Prefix-un-assigned | IDW BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Illinois | IDX BCBS Prefix | IllinoisBCBS:800 972 8088 ILBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IDY BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IDZ BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | IEA BCBS Prefix | BCBSRegence:800 253 0838 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Indiana | IEB BCBS Prefix | IndianaBluecross-Blueshield-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IEC BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Indiana | IED BCBS Prefix | IndianaBluecross-Blueshield-Phonelist |
| Prefix-un-assigned | IEE BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | IEF BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| Prefix-un-assigned | IEG BCBS Prefix | Not applicable |
| Premera BC:Blue-Cross-BS:Blue-Shield of AK | IEH BCBS Prefix | AlaskaBCBSPremera:800 722 4714 |
| Independence Blue-cross of Philadelphia and South-eastern PA | IEI BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IEJ BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IEK BCBS Prefix | BCBSCarefirst-phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Illinois | IEL BCBS Prefix | IllinoisBCBS:800 972 8088 ILBCBS-Phonelist |
| Prefix-un-assigned | IEM BCBS Prefix | Not applicable |
| Prefix-un-assigned | IEN BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of North Carolina | IEO BCBS Prefix | NC-BCBS:800 214 4844 NCBluemedicare:888 296 9790 |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | IEP BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| Empire BC:Blue-Cross-BS:Blue-Shield of Newyork | IEQ BCBS Prefix | NYBCBSEmpire:800 992 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IER BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| BC:Blue-Cross-BS:Blue-Shield of Texas | IES BCBS Prefix | TX-BCBS:800 451 0287 TX-Medicare-BCBS:877 774 8592 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Connecticut | IET BCBS Prefix | BCBSConnecticut-list |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | IEU BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| Prefix-un-assigned | IEV BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Illinois | IEW BCBS Prefix | IllinoisBCBS:800 972 8088 ILBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IEX BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IEY BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IEZ BCBS Prefix | BCBSCarefirst-phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IFA BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IFB BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| BC:Blue-Cross-BS:Blue-Shield of Western New York | IFC BCBS Prefix | WNYHighmarkBCBS:800950 0051 WNYfederal:877 327 1395 WNY-FEP-BCBS:800 234 5082 |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | IFD BCBS Prefix | BCBSRegence:800 253 0838 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IFE BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IFF BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Prefix-un-assigned | IFG BCBS Prefix | Not applicable |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IFH BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IFI BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IFJ BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IFK BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | IFL BCBS Prefix | BCBSRegence:800 253 0838 |
| Prefix-un-assigned | IFM BCBS Prefix | Not applicable |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IFN BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IFO BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Nevada | IFP BCBS Prefix | NevadaBCBS-Phonelist |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IFQ BCBS Prefix | BCBSCarefirst-phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Kentucky | IFR BCBS Prefix | KentuckyBluecross-Blueshield-Phonelist |
| Prefix-un-assigned | IFS BCBS Prefix | Not applicable |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IFT BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IFU BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IFV BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IFW BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IFX BCBS Prefix | OhioBCBS-Phonelist |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IFY BCBS Prefix | BCBSCarefirst-phonelist |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IFZ BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Independence Blue-cross of Philadelphia and South-eastern PA | IGA BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Prefix-un-assigned | IGB BCBS Prefix | Not applicable |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IGC BCBS Prefix | BCBSCarefirst-phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IGD BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| BC:Blue-Cross-BS:Blue-Shield of Alabama | IGE BCBS Prefix | ALBCBS: 205 220 6899 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IGF BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IGG BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Independence Blue-cross of Philadelphia and South-eastern PA | IGH BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IGI BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Independence Blue-cross of Philadelphia and South-eastern PA | IGJ BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IGK BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IGL BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| Prefix-un-assigned | IGM BCBS Prefix | Not applicable |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IGN BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Western New York | IGO BCBS Prefix | WNYHighmarkBCBS:800950 0051 WNYfederal:877 327 1395 WNY-FEP-BCBS:800 234 5082 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IGP BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IGQ BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| Prefix-un-assigned | IGR BCBS Prefix | Not applicable |
| Prefix-un-assigned | IGS BCBS Prefix | Not applicable |
| Prefix-un-assigned | IGT BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | IGU BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IGV BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IGW BCBS Prefix | BCBSCarefirst-phonelist |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IGX BCBS Prefix | BCBSCarefirst-phonelist |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IGY BCBS Prefix | BCBSCarefirst-phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IGZ BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| Prefix-un-assigned | IHA BCBS Prefix | Not applicable |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IHB BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Prefix-un-assigned | IHC BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Nebraska | IHD BCBS Prefix | NE-BCBS:800 635 0579 NE-MedicareBCBS: 888 505 2022 NE-FEPBCBS: 800 223 5584 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IHE BCBS Prefix | OhioBCBS-Phonelist |
| Empire BC:Blue-Cross-BS:Blue-Shield of Newyork | IHF BCBS Prefix | NYBCBSEmpire:800 992 2583 |
| Prefix-un-assigned | IHG BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Alabama | IHH BCBS Prefix | ALBCBS: 205 220 6899 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IHI BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| Empire BC:Blue-Cross-BS:Blue-Shield of Newyork | IHJ BCBS Prefix | NYBCBSEmpire:800 992 2583 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IHK BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of WV | IHL BCBS Prefix | WestvirginiaBCBS:800 543 7822 WVMedicareBCBS:888 459 4020 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of DE | IHM BCBS Prefix | DelawareBCBS:800 346 6262 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IHN BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | IHO BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| Prefix-un-assigned | IHP BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | IHQ BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IHR BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | IHS BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Alabama | IHT BCBS Prefix | ALBCBS: 205 220 6899 |
| Prefix-un-assigned | IHU BCBS Prefix | Not applicable |
| Prefix-un-assigned | IHV BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IHW BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Colorado | IHX BCBS Prefix | Bluecross-Blueshield:(800) 282 4548 ColoradoBluecross-Blueshield-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IHY BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IHZ BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IIA BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Prefix-un-assigned | IIB BCBS Prefix | Not applicable |
| Horizon BC:Blue-Cross-BS:Blue-Shield of NJ | IIC BCBS Prefix | NewJerseyBCBS:800 624 1110 NJBCBS-phonelist |
| BC of Idaho -Blue-Cross | IID BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IIE BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IIF BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IIG BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| Prefix-un-assigned | IIH BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Tennessee | III BCBS Prefix | TN-BCBS:800 924 7141 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IIJ BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IIK BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IIL BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IIM BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | IIN BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| Prefix-un-assigned | IIO BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Western New York | IIP BCBS Prefix | WNYHighmarkBCBS:800950 0051 WNYfederal:877 327 1395 WNY-FEP-BCBS:800 234 5082 |
| Floridablue | IIQ BCBS Prefix | BCBSFL:800 955 5692 |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IIR BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Prefix-un-assigned | IIS BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Illinois | IIT BCBS Prefix | IllinoisBCBS:800 972 8088 ILBCBS-Phonelist |
| Independence Blue-cross of Philadelphia and South-eastern PA | IIU BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Floridablue | IIV BCBS Prefix | BCBSFL:800 955 5692 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IIW BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC of Idaho -Blue-Cross | IIX BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IIY BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Floridablue | IIZ BCBS Prefix | BCBSFL:800 955 5692 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | IJA BCBS Prefix | WisconsinBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Kentucky | IJB BCBS Prefix | KentuckyBluecross-Blueshield-Phonelist |
| Prefix-un-assigned | IJC BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of New Hampshire | IJD BCBS Prefix | New HampshireBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Western New York | IJE BCBS Prefix | WNYHighmarkBCBS:800950 0051 WNYfederal:877 327 1395 WNY-FEP-BCBS:800 234 5082 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IJF BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IJG BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IJH BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IJI BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IJJ BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IJK BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IJL BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Prefix-un-assigned | IJM BCBS Prefix | Not applicable |
| Floridablue | IJN BCBS Prefix | BCBSFL:800 955 5692 |
| Prefix-un-assigned | IJO BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IJP BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IJQ BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| BC of Idaho -Blue-Cross | IJR BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | IJS BCBS Prefix | WisconsinBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IJT BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Texas | IJU BCBS Prefix | TX-BCBS:800 451 0287 TX-Medicare-BCBS:877 774 8592 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IJV BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Prefix-un-assigned | IJW BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IJX BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Capitalbluecross of PA | IJY BCBS Prefix | PennsylvaniaCapitalBC:800 874 8433 |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IJZ BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Kentucky | IKA BCBS Prefix | KentuckyBluecross-Blueshield-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IKB BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IKC BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IKD BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Independence Blue-cross of Philadelphia and South-eastern PA | IKE BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Independence Blue-cross of Philadelphia and South-eastern PA | IKF BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Prefix-un-assigned | IKG BCBS Prefix | Not applicable |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IKH BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Floridablue | IKI BCBS Prefix | BCBSFL:800 955 5692 |
| Prefix-un-assigned | IKJ BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IKK BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IKL BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| Prefix-un-assigned | IKM BCBS Prefix | Not applicable |
| Prefix-un-assigned | IKN BCBS Prefix | Not applicable |
| High-mark BC:Blue-Cross-BS:Blue-Shield of DE | IKO BCBS Prefix | DelawareBCBS:800 346 6262 |
| Prefix-un-assigned | IKP BCBS Prefix | Not applicable |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IKQ BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Missouri | IKR BCBS Prefix | MissouriBCBS:888 571 9054 MOBluecrossBlueshield–Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IKS BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Kentucky | IKT BCBS Prefix | KentuckyBluecross-Blueshield-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IKU BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IKV BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Prefix-un-assigned | IKW BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IKX BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Nebraska | IKY BCBS Prefix | NE-BCBS:800 635 0579 NE-MedicareBCBS: 888 505 2022 NE-FEPBCBS: 800 223 5584 |
| Prefix-un-assigned | IKZ BCBS Prefix | Not applicable |
| Empire BC:Blue-Cross-BS:Blue-Shield of Newyork | ILA BCBS Prefix | NYBCBSEmpire:800 992 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | ILB BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | ILC BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | ILD BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | ILE BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| BC:Blue-Cross-BS:Blue-Shield of Alabama | ILF BCBS Prefix | ALBCBS: 205 220 6899 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | ILG BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC:Blue-Cross-BS:Blue-Shield-California-Bluecross | ILH BCBS Prefix | CaliforniaBCBS: 800 677 6669 CABCBS-Phonelist |
| Prefix-un-assigned | ILI BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | ILJ BCBS Prefix | WisconsinBCBS-Phonelist |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | ILK BCBS Prefix | BCBSRegence:800 253 0838 |
| BC:Blue-Cross-BS:Blue-Shield-California-Bluecross | ILL BCBS Prefix | CaliforniaBCBS: 800 677 6669 CABCBS-Phonelist |
| Prefix-un-assigned | ILM BCBS Prefix | Not applicable |
| Prefix-un-assigned | ILN BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | ILO BCBS Prefix | WisconsinBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Kansas City | ILP BCBS Prefix | KansasBCBS:800 432 3990 KansasF.E.P BCBS: 800 432 0379 |
| Prefix-un-assigned | ILQ BCBS Prefix | Not applicable |
| Prefix-un-assigned | ILR BCBS Prefix | Not applicable |
| Premera BC:Blue-Cross-BS:Blue-Shield of AK | ILS BCBS Prefix | AlaskaBCBSPremera:800 722 4714 |
| BC:Blue-Cross-BS:Blue-Shield of Illinois | ILT BCBS Prefix | IllinoisBCBS:800 972 8088 ILBCBS-Phonelist |
| Prefix-un-assigned | ILU BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Alabama | ILV BCBS Prefix | ALBCBS: 205 220 6899 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | ILW BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC:Blue-Cross-BS:Blue-Shield of Alabama | ILX BCBS Prefix | ALBCBS: 205 220 6899 |
| BC:Blue-Cross-BS:Blue-Shield-California-Bluecross | ILY BCBS Prefix | CaliforniaBCBS: 800 677 6669 CABCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | ILZ BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Excellus BC:Blue-Cross-BS:Blue-Shield of Newyork | IMA BCBS Prefix | NYExcellusBCBS:800 920 8889 |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | IMB BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IMC BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| Prefix-un-assigned | IMD BCBS Prefix | Not applicable |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IME BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | IMF BCBS Prefix | BCBSRegence:800 253 0838 |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | IMG BCBS Prefix | BCBSRegence:800 253 0838 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Colorado | IMH BCBS Prefix | Bluecross-Blueshield:(800) 282 4548 ColoradoBluecross-Blueshield-Phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IMI BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Missouri | IMJ BCBS Prefix | MissouriBCBS:888 571 9054 MOBluecrossBlueshield–Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Maine | IMK BCBS Prefix | MaineBluecross-Blueshield-Phonelist |
| Prefix-un-assigned | IML BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Western New York | IMM BCBS Prefix | WNYHighmarkBCBS:800950 0051 WNYfederal:877 327 1395 WNY-FEP-BCBS:800 234 5082 |
| Prefix-un-assigned | IMN BCBS Prefix | Not applicable |
| Prefix-un-assigned | IMO BCBS Prefix | Not applicable |
| Prefix-un-assigned | IMP BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Tennessee | IMQ BCBS Prefix | TN-BCBS:800 924 7141 |
| BC:Blue-Cross-BS:Blue-Shield of Alabama | IMR BCBS Prefix | ALBCBS: 205 220 6899 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Kentucky | IMS BCBS Prefix | KentuckyBluecross-Blueshield-Phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IMT BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | IMU BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | IMV BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IMW BCBS Prefix | OhioBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Missouri | IMX BCBS Prefix | MissouriBCBS:888 571 9054 MOBluecrossBlueshield–Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IMY BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IMZ BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Kentucky | INA BCBS Prefix | KentuckyBluecross-Blueshield-Phonelist |
| Premera BC:Blue-Cross-BS:Blue-Shield of AK | INB BCBS Prefix | AlaskaBCBSPremera:800 722 4714 |
| BC:Blue-Cross-BS:Blue-Shield-California-Bluecross | INC BCBS Prefix | CaliforniaBCBS: 800 677 6669 CABCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of North Carolina | IND BCBS Prefix | NC-BCBS:800 214 4844 NCBluemedicare:888 296 9790 |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | INE BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Prefix-un-assigned | INF BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | ING BCBS Prefix | OhioBCBS-Phonelist |
| Prefix-un-assigned | INH BCBS Prefix | Not applicable |
| High-mark BC:Blue-Cross-BS:Blue-Shield of DE | INI BCBS Prefix | DelawareBCBS:800 346 6262 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Kentucky | INJ BCBS Prefix | KentuckyBluecross-Blueshield-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield-California-Bluecross | INK BCBS Prefix | CaliforniaBCBS: 800 677 6669 CABCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Tennessee | INL BCBS Prefix | TN-BCBS:800 924 7141 |
| Prefix-un-assigned | INM BCBS Prefix | Not applicable |
| Prefix-un-assigned | INN BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | INO BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC:Blue-Cross-BS:Blue-Shield of North Carolina | INP BCBS Prefix | NC-BCBS:800 214 4844 NCBluemedicare:888 296 9790 |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | INQ BCBS Prefix | BCBSRegence:800 253 0838 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Indiana | INR BCBS Prefix | IndianaBluecross-Blueshield-Phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | INS BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | INT BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| Prefix-un-assigned | INU BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | INV BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Independence Blue-cross of Philadelphia and South-eastern PA | INW BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Prefix-un-assigned | INX BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield-California-Bluecross | INY BCBS Prefix | CaliforniaBCBS: 800 677 6669 CABCBS-Phonelist |
| Prefix-un-assigned | INZ BCBS Prefix | Not applicable |
| Prefix-un-assigned | IOA BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Tennessee | IOB BCBS Prefix | TN-BCBS:800 924 7141 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IOC BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IOD BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Empire BC:Blue-Cross-BS:Blue-Shield of Newyork | IOE BCBS Prefix | NYBCBSEmpire:800 992 2583 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IOF BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Blue-Shield of North-eastern-Newyork | IOG BCBS Prefix | NY-BS:800 444 4552 NYBluecard:800 429 9886 |
| Prefix-un-assigned | IOH BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IOI BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IOJ BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Prefix-un-assigned | IOK BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IOL BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IOM BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Floridablue | ION BCBS Prefix | BCBSFL:800 955 5692 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IOO BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Western New York | IOP BCBS Prefix | WNYHighmarkBCBS:800950 0051 WNYfederal:877 327 1395 WNY-FEP-BCBS:800 234 5082 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IOQ BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IOR BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| BC:Blue-Cross-BS:Blue-Shield of North Carolina | IOS BCBS Prefix | NC-BCBS:800 214 4844 NCBluemedicare:888 296 9790 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IOT BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | IOU BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| Prefix-un-assigned | IOV BCBS Prefix | Not applicable |
| Prefix-un-assigned | IOW BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IOX BCBS Prefix | OhioBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IOY BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IOZ BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IPA BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IPB BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| Prefix-un-assigned | IPC BCBS Prefix | Not applicable |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IPD BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IPE BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Prefix-un-assigned | IPF BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IPG BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| BC:Blue-Cross-BS:Blue-Shield of Kansas | IPH BCBS Prefix | KansasBCBS:800 432 3990 KansasF.E.P BCBS: 800 432 0379 |
| Prefix-un-assigned | IPI BCBS Prefix | Not applicable |
| Prefix-un-assigned | IPJ BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IPK BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC:Blue-Cross-BS:Blue-Shield of Kansas City | IPL BCBS Prefix | KansasBCBS:800 432 3990 KansasF.E.P BCBS: 800 432 0379 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IPM BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IPN BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| Prefix-un-assigned | IPO BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IPP BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IPQ BCBS Prefix | OhioBCBS-Phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IPR BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IPS BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC:Blue-Cross-BS:Blue-Shield of Illinois | IPT BCBS Prefix | IllinoisBCBS:800 972 8088 ILBCBS-Phonelist |
| BC of Idaho -Blue-Cross | IPU BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IPV BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | IPW BCBS Prefix | BCBSRegence:800 253 0838 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IPX BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| BC:Blue-Cross-BS:Blue-Shield of Western New York | IPY BCBS Prefix | WNYHighmarkBCBS:800950 0051 WNYfederal:877 327 1395 WNY-FEP-BCBS:800 234 5082 |
| BC:Blue-Cross-BS:Blue-Shield of Rhode Island | IPZ BCBS Prefix | RI-BCBS:800 230 9050 |
| Prefix-un-assigned | IQA BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IQB BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Capitalbluecross of PA | IQC BCBS Prefix | PennsylvaniaCapitalBC:800 874 8433 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IQD BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Tennessee | IQE BCBS Prefix | TN-BCBS:800 924 7141 |
| BC:Blue-Cross-BS:Blue-Shield of Tennessee | IQF BCBS Prefix | TN-BCBS:800 924 7141 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Indiana | IQG BCBS Prefix | IndianaBluecross-Blueshield-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Kentucky | IQH BCBS Prefix | KentuckyBluecross-Blueshield-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Missouri | IQI BCBS Prefix | MissouriBCBS:888 571 9054 MOBluecrossBlueshield–Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IQJ BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IQK BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IQL BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IQM BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | IQN BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| BC:Blue-Cross-BS:Blue-Shield-California-Bluecross | IQO BCBS Prefix | CaliforniaBCBS: 800 677 6669 CABCBS-Phonelist |
| Prefix-un-assigned | IQP BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IQQ BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | IQR BCBS Prefix | WisconsinBCBS-Phonelist |
| Independence Blue-cross of Philadelphia and South-eastern PA | IQS BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IQT BCBS Prefix | OhioBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IQU BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IQV BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IQW BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IQX BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IQY BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Prefix-un-assigned | IQZ BCBS Prefix | Not applicable |
| Horizon BC:Blue-Cross-BS:Blue-Shield of NJ | IRA BCBS Prefix | NewJerseyBCBS:800 624 1110 NJBCBS-phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | IRB BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Colorado | IRC BCBS Prefix | Bluecross-Blueshield:(800) 282 4548 ColoradoBluecross-Blueshield-Phonelist |
| Prefix-un-assigned | IRD BCBS Prefix | Not applicable |
| Prefix-un-assigned | IRE BCBS Prefix | Not applicable |
| Prefix-un-assigned | IRF BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | IRG BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| Prefix-un-assigned | IRH BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Rhode Island | IRI BCBS Prefix | RI-BCBS:800 230 9050 |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IRJ BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| BC:Blue-Cross-BS:Blue-Shield of Alabama | IRK BCBS Prefix | ALBCBS: 205 220 6899 |
| Prefix-un-assigned | IRL BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Kansas City | IRM BCBS Prefix | KansasBCBS:800 432 3990 KansasF.E.P BCBS: 800 432 0379 |
| Prefix-un-assigned | IRN BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IRO BCBS Prefix | OhioBCBS-Phonelist |
| Floridablue | IRP BCBS Prefix | BCBSFL:800 955 5692 |
| Floridablue | IRQ BCBS Prefix | BCBSFL:800 955 5692 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IRR BCBS Prefix | OhioBCBS-Phonelist |
| Floridablue | IRS BCBS Prefix | BCBSFL:800 955 5692 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IRT BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Connecticut | IRU BCBS Prefix | BCBSConnecticut-list |
| Prefix-un-assigned | IRV BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IRW BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | IRX BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| Independence Blue-cross of Philadelphia and South-eastern PA | IRY BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield-California-Bluecross | IRZ BCBS Prefix | CaliforniaBCBS: 800 677 6669 CABCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | ISA BCBS Prefix | OhioBCBS-Phonelist |
| Premera BC:Blue-Cross-BS:Blue-Shield of AK | ISB BCBS Prefix | AlaskaBCBSPremera:800 722 4714 |
| Horizon BC:Blue-Cross-BS:Blue-Shield of NJ | ISC BCBS Prefix | NewJerseyBCBS:800 624 1110 NJBCBS-phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Arizona | ISD BCBS Prefix | ArizonaBCBS: 800 232 2345 ArizonamedicareBCBS: 800 446 8331 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | ISE BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| Prefix-un-assigned | ISF BCBS Prefix | Not applicable |
| Prefix-un-assigned | ISG BCBS Prefix | Not applicable |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | ISH BCBS Prefix | BCBSCarefirst-phonelist |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | ISI BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Independence Blue-cross of Philadelphia and South-eastern PA | ISJ BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Kentucky | ISK BCBS Prefix | KentuckyBluecross-Blueshield-Phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | ISL BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | ISM BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| BC of Idaho -Blue-Cross | ISN BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | ISO BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | ISP BCBS Prefix | WisconsinBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Kansas City | ISQ BCBS Prefix | KansasBCBS:800 432 3990 KansasF.E.P BCBS: 800 432 0379 |
| Prefix-un-assigned | ISR BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Missouri | ISS BCBS Prefix | MissouriBCBS:888 571 9054 MOBluecrossBlueshield–Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IST BCBS Prefix | OhioBCBS-Phonelist |
| BC of Idaho -Blue-Cross | ISU BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| Prefix-un-assigned | ISV BCBS Prefix | Not applicable |
| BC of Idaho -Blue-Cross | ISW BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | ISX BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Prefix-un-assigned | ISY BCBS Prefix | Not applicable |
| BC of Idaho -Blue-Cross | ISZ BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | ITA BCBS Prefix | BCBSCarefirst-phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | ITB BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | ITC BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| Independence Blue-cross of Philadelphia and South-eastern PA | ITD BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of North Carolina | ITE BCBS Prefix | NC-BCBS:800 214 4844 NCBluemedicare:888 296 9790 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | ITF BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Prefix-un-assigned | ITG BCBS Prefix | Not applicable |
| Capitalbluecross of PA | ITH BCBS Prefix | PennsylvaniaCapitalBC:800 874 8433 |
| Prefix-un-assigned | ITI BCBS Prefix | Not applicable |
| Prefix-un-assigned | ITJ BCBS Prefix | Not applicable |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | ITK BCBS Prefix | BCBSCarefirst-phonelist |
| Prefix-un-assigned | ITL BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | ITM BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Prefix-un-assigned | ITN BCBS Prefix | Not applicable |
| Blue-Shield of North-eastern-Newyork | ITO BCBS Prefix | NY-BS:800 444 4552 NYBluecard:800 429 9886 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | ITP BCBS Prefix | OhioBCBS-Phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | ITQ BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Empire BC:Blue-Cross-BS:Blue-Shield of Newyork | ITR BCBS Prefix | NYBCBSEmpire:800 992 2583 |
| Arkansas BC:Blue-Cross-BS:Blue-Shield | ITS BCBS Prefix | ArkansasBCBS: 800 238 8379 ARBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | ITT BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | ITU BCBS Prefix | BCBSRegence:800 253 0838 |
| Prefix-un-assigned | ITV BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Illinois | ITW BCBS Prefix | IllinoisBCBS:800 972 8088 ILBCBS-Phonelist |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | ITX BCBS Prefix | BCBSRegence:800 253 0838 |
| Independence Blue-cross of Philadelphia and South-eastern PA | ITY BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | ITZ BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IUA BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Connecticut | IUB BCBS Prefix | BCBSConnecticut-list |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IUC BCBS Prefix | OhioBCBS-Phonelist |
| Prefix-un-assigned | IUD BCBS Prefix | Not applicable |
| Empire BC:Blue-Cross-BS:Blue-Shield of Newyork | IUE BCBS Prefix | NYBCBSEmpire:800 992 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Missouri | IUF BCBS Prefix | MissouriBCBS:888 571 9054 MOBluecrossBlueshield–Phonelist |
| Premera BC:Blue-Cross-BS:Blue-Shield of AK | IUG BCBS Prefix | AlaskaBCBSPremera:800 722 4714 |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | IUH BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Rhode Island | IUI BCBS Prefix | RI-BCBS:800 230 9050 |
| Prefix-un-assigned | IUJ BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | IUK BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IUL BCBS Prefix | BCBSCarefirst-phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | IUM BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| Prefix-un-assigned | IUN BCBS Prefix | Not applicable |
| Empire BC:Blue-Cross-BS:Blue-Shield of Newyork | IUO BCBS Prefix | NYBCBSEmpire:800 992 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Connecticut | IUP BCBS Prefix | BCBSConnecticut-list |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IUQ BCBS Prefix | BCBSCarefirst-phonelist |
| Independence Blue-cross of Philadelphia and South-eastern PA | IUR BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Independence Blue-cross of Philadelphia and South-eastern PA | IUS BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IUT BCBS Prefix | OhioBCBS-Phonelist |
| Prefix-un-assigned | IUU BCBS Prefix | Not applicable |
| RegenceBC:Blue-Cross-BS:Blue-Shield(Oregon/Idaho/Utah/Washington) | IUV BCBS Prefix | BCBSRegence:800 253 0838 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IUW BCBS Prefix | OhioBCBS-Phonelist |
| Prefix-un-assigned | IUX BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IUY BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Prefix-un-assigned | IUZ BCBS Prefix | Not applicable |
| Prefix-un-assigned | IVA BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IVB BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Kansas City | IVC BCBS Prefix | KansasBCBS:800 432 3990 KansasF.E.P BCBS: 800 432 0379 |
| Prefix-un-assigned | IVD BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IVE BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC:Blue-Cross-BS:Blue-Shield of Tennessee | IVF BCBS Prefix | TN-BCBS:800 924 7141 |
| Prefix-un-assigned | IVG BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Rhode Island | IVH BCBS Prefix | RI-BCBS:800 230 9050 |
| BC:Blue-Cross-BS:Blue-Shield of Louisiana | IVI BCBS Prefix | LABCBS:800 495 2583 BluecardLouisiana:800 810 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | IVJ BCBS Prefix | WisconsinBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Mississippi | IVK BCBS Prefix | MSBCBS:800 257 5825 |
| Prefix-un-assigned | IVL BCBS Prefix | Not applicable |
| Prefix-un-assigned | IVM BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Tennessee | IVN BCBS Prefix | TN-BCBS:800 924 7141 |
| Prefix-un-assigned | IVO BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IVP BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Prefix-un-assigned | IVQ BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Arizona | IVR BCBS Prefix | ArizonaBCBS: 800 232 2345 ArizonamedicareBCBS: 800 446 8331 |
| BC:Blue-Cross-BS:Blue-Shield-California-Bluecross | IVS BCBS Prefix | CaliforniaBCBS: 800 677 6669 CABCBS-Phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IVT BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Floridablue | IVU BCBS Prefix | BCBSFL:800 955 5692 |
| High-mark BC:Blue-Cross-BS:Blue-Shield of PA | IVV BCBS Prefix | PennsylvaniaBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | IVW BCBS Prefix | WisconsinBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IVX BCBS Prefix | OhioBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Rhode Island | IVY BCBS Prefix | RI-BCBS:800 230 9050 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Indiana | IVZ BCBS Prefix | IndianaBluecross-Blueshield-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Indiana | IWA BCBS Prefix | IndianaBluecross-Blueshield-Phonelist |
| Prefix-un-assigned | IWB BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IWC BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IWD BCBS Prefix | BCBSCarefirst-phonelist |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IWE BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Empire BC:Blue-Cross-BS:Blue-Shield of Newyork | IWF BCBS Prefix | NYBCBSEmpire:800 992 2583 |
| Excellus BC:Blue-Cross-BS:Blue-Shield of Newyork | IWG BCBS Prefix | NYExcellusBCBS:800 920 8889 |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IWH BCBS Prefix | BCBSCarefirst-phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IWI BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Indiana | IWJ BCBS Prefix | IndianaBluecross-Blueshield-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IWK BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IWL BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Prefix-un-assigned | IWM BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IWN BCBS Prefix | OhioBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Missouri | IWO BCBS Prefix | MissouriBCBS:888 571 9054 MOBluecrossBlueshield–Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IWP BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IWQ BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Connecticut | IWR BCBS Prefix | BCBSConnecticut-list |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IWS BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Capitalbluecross of PA | IWT BCBS Prefix | PennsylvaniaCapitalBC:800 874 8433 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Virginia | IWU BCBS Prefix | VirginiaBCBS: 833 592 9956 |
| BC:Blue-Cross-BS:Blue-Shield of Kansas City | IWV BCBS Prefix | KansasBCBS:800 432 3990 KansasF.E.P BCBS: 800 432 0379 |
| BC:Blue-Cross-BS:Blue-Shield of Massachusetts | IWW BCBS Prefix | MABCBS: 800 443 6657 BluecardMassachusetts:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Western New York | IWX BCBS Prefix | WNYHighmarkBCBS:800950 0051 WNYfederal:877 327 1395 WNY-FEP-BCBS:800 234 5082 |
| Empire BC:Blue-Cross-BS:Blue-Shield of Newyork | IWY BCBS Prefix | NYBCBSEmpire:800 992 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IWZ BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Arkansas BC:Blue-Cross-BS:Blue-Shield | IXA BCBS Prefix | ArkansasBCBS: 800 238 8379 ARBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IXB BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Prefix-un-assigned | IXC BCBS Prefix | Not applicable |
| Prefix-un-assigned | IXD BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IXE BCBS Prefix | OhioBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Indiana | IXF BCBS Prefix | IndianaBluecross-Blueshield-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Indiana | IXG BCBS Prefix | IndianaBluecross-Blueshield-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Indiana | IXH BCBS Prefix | IndianaBluecross-Blueshield-Phonelist |
| Floridablue | IXI BCBS Prefix | BCBSFL:800 955 5692 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Indiana | IXJ BCBS Prefix | IndianaBluecross-Blueshield-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IXK BCBS Prefix | OhioBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IXL BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IXM BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IXN BCBS Prefix | OhioBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of CA-Blueshield | IXO BCBS Prefix | CA-BS:800 541 6652 800 468 9935 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Missouri | IXP BCBS Prefix | MissouriBCBS:888 571 9054 MOBluecrossBlueshield–Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IXQ BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IXR BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Prefix-un-assigned | IXS BCBS Prefix | Not applicable |
| Prefix-un-assigned | IXT BCBS Prefix | Not applicable |
| Independence Blue-cross of Philadelphia and South-eastern PA | IXU BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Prefix-un-assigned | IXV BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IXW BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IXX BCBS Prefix | OhioBCBS-Phonelist |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IXY BCBS Prefix | OhioBCBS-Phonelist |
| Prefix-un-assigned | IXZ BCBS Prefix | Not applicable |
| Prefix-un-assigned | IYA BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | IYB BCBS Prefix | WisconsinBCBS-Phonelist |
| Independence Blue-cross of Philadelphia and South-eastern PA | IYC BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| Capitalbluecross of PA | IYD BCBS Prefix | PennsylvaniaCapitalBC:800 874 8433 |
| Prefix-un-assigned | IYE BCBS Prefix | Not applicable |
| Prefix-un-assigned | IYF BCBS Prefix | Not applicable |
| Floridablue | IYG BCBS Prefix | BCBSFL:800 955 5692 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Kentucky | IYH BCBS Prefix | KentuckyBluecross-Blueshield-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IYI BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Kansas City | IYJ BCBS Prefix | KansasBCBS:800 432 3990 KansasF.E.P BCBS: 800 432 0379 |
| Prefix-un-assigned | IYK BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IYL BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Prefix-un-assigned | IYM BCBS Prefix | Not applicable |
| Premera BC:Blue-Cross-BS:Blue-Shield of AK | IYN BCBS Prefix | AlaskaBCBSPremera:800 722 4714 |
| Prefix-un-assigned | IYO BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Colorado | IYP BCBS Prefix | Bluecross-Blueshield:(800) 282 4548 ColoradoBluecross-Blueshield-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of South Carolina | IYQ BCBS Prefix | SC-BCBS:800 868 2510 SC-FEPBCBS: 888 930 2345 |
| Floridablue | IYR BCBS Prefix | BCBSFL:800 955 5692 |
| Prefix-un-assigned | IYS BCBS Prefix | Not applicable |
| Prefix-un-assigned | IYT BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IYU BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IYV BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Independence Blue-cross of Philadelphia and South-eastern PA | IYW BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IYX BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IYY BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IYZ BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Alabama | IZA BCBS Prefix | ALBCBS: 205 220 6899 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Wisconsin | IZB BCBS Prefix | WisconsinBCBS-Phonelist |
| Prefix-un-assigned | IZC BCBS Prefix | Not applicable |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IZD BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| Care-first BC:Blue-Cross-BS:Blue-Shield(Maryland/District of Columbia/Northern Virginia) | IZE BCBS Prefix | BCBSCarefirst-phonelist |
| Independence Blue-cross of Philadelphia and South-eastern PA | IZF BCBS Prefix | PennsylvaniaBluecross-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IZG BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Prefix-un-assigned | IZH BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IZI BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IZJ BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Ohio | IZK BCBS Prefix | OhioBCBS-Phonelist |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IZL BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IZM BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Prefix-un-assigned | IZN BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IZO BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC of Idaho -Blue-Cross | IZP BCBS Prefix | ID-BC:800 627 1188 Idaho-FEP-BC:800 627 6656 |
| Prefix-un-assigned | IZQ BCBS Prefix | Not applicable |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IZR BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IZS BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Prefix-un-assigned | IZT BCBS Prefix | Not applicable |
| Wellmark BC:Blue-Cross-BS:Blue-Shield of SD/IO | IZU BCBS Prefix | Southdakota/IowaBCB:800 774 3892 BCBSFEP-SD/IO:800 532 1537 |
| Anthem BC:Blue-Cross-BS:Blue-Shield of Georgia | IZV BCBS Prefix | GABluecross-Blueshield:800 676 2583 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IZW BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IZX BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| BC:Blue-Cross-BS:Blue-Shield of Michigan | IZY BCBS Prefix | MichiganProfessionalBCBS:800 344 8525 MichiganHospitalBCBS:800 249 5103 MichiganVisionBCBS: 800 482 4047 |
| Prefix-un-assigned | IZZ BCBS Prefix | Not applicable |