| PAI PAR PAU PBK PBM PBS PCB PCC PCE PCQ PCZ PDD PDM PEE PEI PEN PEO PEQ PEW PEY PEZ PFL PFN PFO PFV PGB PGF PGH PGJ PGL PGN PGT PHA PHD PHE PHH PHK PHR PHV PHZ PIC PIE PIG PIJ PIN PIR PIS PIV PJG PJH PJM PKC PKE PKK PKU PKY PKZ PLA PLB PLD PLF PLI PLK PLQ PLX PLY PLZ PMF PMH PMJ PML PMN PMW PNB PNG PNJ PNV PNY POC POJ POM POS POX POZ PPH PPN PPZ PQC PQF PQL PQN PQY PQZ PRG PRI PRK PRN PRS PSD PSF PSG PSJ PSK PSN PSR PSW PTF PTJ PTZ PUF PUI PUN PUZ PVE PVI PVL PVM PVQ PVS PVU PVZ PWH PWI PWQ PWR PWY PXC PXF PXH PXK PXM PXT PXX PXY PXZ PYC PYD PYR PYT PYU PYV PYW PYX PZC PZE PZH PZK PZL PZP PZU PZX | Alpha Prefix not assigned or unallocated |
| PCP PDH PEA PQQ PWL | Anthem Blue Cross Blue Shield of Colorado |
| PKX PSH PSY PTH | Anthem Blue Cross Blue Shield of Connecticut |
| PAD PAL PAX PCJ PDC PGU PGV PHP PHQ PHS PJV PJX PPT PSQ PTU PUJ PWT PYZ | Anthem Blue Cross Blue Shield of Georgia |
| PMM PTY | Anthem Blue Cross Blue Shield of Indiana |
| PPD PTS PXP | Anthem Blue Cross Blue Shield of Kentucky |
| PBC PBD PEL PEU PFW PMY | Anthem Blue Cross Blue Shield of Missouri |
| PSX | Anthem Blue Cross Blue Shield of Nevada |
| PAQ PBJ PCO PCT PCW PCY PDF PED PGO PGS PHX PIK PJW PKJ PKW PLH PLN PLW PMC PMG POA PRH PRR PSV PTG PTO PVJ PVR PVT PWN PXA PXR PYN PYQ PYS PZB PZN | Anthem Blue Cross Blue Shield of Ohio |
| PAV PFE PFF PFT PKH PLV PPC PPI PRJ PSL PVN PWB PWG PWS PYP PZV | Anthem Blue Cross Blue Shield of Virginia |
| PFH PGG PHC PID PIM PTV PXQ PYK | Anthem Blue Cross Blue Shield of Wisconsin |
| PAF PBE PDK PDL PFS PHM PJC PKQ PKS PLL PNO PNP POG POH POV PQD PQV PQX PTA PVG PVK PVP PWF PZG PZM | Anthem Bluecross of California |
| PGQ PIP PIQ PRL PTR PXG | Arkansas Blue Cross Blue Shield |
| PDO PDZ PEF PEX PGW PGX PHT PIX PIZ PJA PKF PLC PPA PPR PQB PRA PRD PRV PRX PVH | Blue Cross Blue Shield of Alabama |
| PCL PGE PMA PMK PUO PUS PXD PXO | Blue Cross Blue Shield of Arizona |
| PAJ PAN PAP PAS PBU PDU PDW PDY PFJ PFY PGI PGZ PJP PJS PJT PKA PLU PMB PMX PNF PNK PPF PPK PPO PPP PPQ PPU PRZ PSC PTL PTN PVD PWD PWV PWW PXS PYE PZD | Blue Cross Blue Shield of Illinois |
| PHF | Blue Cross Blue Shield of Kansas |
| PCG PFG PGR POL PQK PRY PTD PVA | Blue Cross Blue Shield of Kansas City |
| PBH PKV PMV PSZ | Blue Cross Blue Shield of Louisiana |
| PAE PBA PFK PIT PLM PLO POQ PQE PQS PQW PSA PUW PWK PXL | Blue Cross Blue Shield of Massachusetts |
| PDX PJD PJI PKL PKM PLE PNI PUA PUG PUT PUU PUV PXU PXW PYJ PZJ | Blue Cross Blue Shield of Michigan |
| PBR PBT PDN PDP PEM PIB PKT PLP PMU PNR PPJ PPY PQJ | Blue Cross Blue Shield of Minnesota |
| PTX | Blue Cross Blue Shield of Montana |
| PRE | Blue Cross Blue Shield of Nebraska |
| PAW PCH PGA PJO PMD PST PVX PVY PYO | Blue Cross Blue Shield of North Carolina |
| PET PHN PTW PVC PWZ | Blue Cross Blue Shield of Rhode Island |
| PJK PMO PMZ PUK PUM PVV PZI | Blue Cross Blue Shield of South Carolina |
| PAB PDG PGC PGK PIO PQI PRM PTT PVF | Blue Cross Blue Shield of Tennessee |
| PBW PCD PDB PEC PEG PES PME PNU PSB PTE PYH PZA | Blue Cross Blue Shield of Texas |
| PBI PBY PJL PLR PRB PRU PYL PZY PZZ | Blue Cross Blue Shield of Western New York |
| PWJ | Bluecross North Carolina |
| PEJ POF PPV PQO PWX | Bluecross of Idaho |
| PAG PAM PBG PBL PBO PCI PCV PDE PDQ PEP PFC PFD PFQ PGD PHG PHI PHL PHU PKD PMS PNE POD POE POK POO POP POT POW POY PQU PRC PSE PSI PSP PTB PTC PUE PWO PYA PZF | Blueshield of California |
| PBN PEH | Blueshield of Northeastern New York |
| PAA PAC PEB PFX PHJ PNH PNL PTK PTM PXV | Capital Bluecross of Pennsylvania |
| PAK PAO PCF PCN PCR PCU PDS PEV PHW PIA PIU PJN PLG PMI PNA PND PRO PTP PVO PYG | Carefirst Blue Cross Blue Shield(Maryland/District of Columbia/Northern Virginia) |
| PBZ PCA PCK PEK PGY PHY PLJ PLT PQG PRF PTQ PWE PWP PYB PZR | Empire Blue Cross Blue Shield of New York |
| PAY | Excellus Blue Cross Blue Shield of New York |
| PBB PFU PGP PJZ PMR PPX PUP PVW PWA PXB PXJ PXN PZQ | Florida Blue |
| PKB | Florida Explore-My-Plan |
| PFI PGM PIW PJU PKN PNM PNX POI PPE PPG PPM PPW PQM PUH | Highmark Blue Cross Blue Shield of Pennsylvania |
| PFA | Highmark Blueshield of Pennsylvania |
| PFR PFZ PJY PKP PUB | Horizon Blue Cross Blue Shield of New Jersey |
| PAH PBX PDA PDT PFB PHB PHO PIH PIL PIY PJJ PJR PKG PKI POU PRP PRW PSM PSO PUD PUQ PXI PYI PZO | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| PAZ PBF PBV PCM PFP PKO PMT PNC PNQ PNT PON PPB PPS PQA PQH PQP PSU PUL PUX PXE PYF | Premera Blue Cross Blue Shield of Alaska |
| PBQ | Premera Bluecross of Alaska |
| PDR PFM PJB PJE PPL PQT PRT PWC | Regence Blue Cross Blue Shield(Oregon/Idaho/Utah/Washington) |
| PAT PBP PCS PCX PDI PDJ PDV PER PIF PII PJF PJQ PKR PLS PMP PMQ PNN PNS PNW PNZ POB POR PQR PRQ PSS PTI PUC PUR PUY PVB PWM PWU PYM PYY PZS PZT PZW | Wellmark Blue Cross Blue Shield of South Dakota/Iowa |