| UAA | BCBS of Michigan |
| UAB | BCBS of Kansas City |
| UAC | BCBS of Michigan |
| UAD | Alpha Prefix not assigned or unallocated |
| UAE | Blueshield of California |
| UAF | Blueshield of California |
| UAG | BCBS of Texas |
| UAH | BCBS of Alabama |
| UAI | Alpha Prefix not assigned or unallocated |
| UAJ | Alpha Prefix not assigned or unallocated |
| UAK | Anthem BCBS of Connecticut |
| UAL | BCBS of Illinois |
| UAM | Highmark BCBS of Pennsylvania |
| UAN | Horizon BCBS of New Jersey |
| UAO | BCBS of Michigan |
| UAP | Alpha Prefix not assigned or unallocated |
| UAQ | Blueshield of California |
| UAR | BCBS of Texas |
| UAS | Anthem Bluecross of California |
| UAT | Anthem Bluecross of California |
| UAU | BCBS of Michigan |
| UAV | Anthem Bluecross of California |
| UAW | BCBS of Michigan |
| UAX | Empire BCBS of New York |
| UAY | BCBS of Michigan |
| UAZ | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UBA | Anthem BCBS of Virginia |
| UBB | Anthem BCBS of Missouri |
| UBC | Anthem BCBS of Ohio |
| UBD | Anthem BCBS of Ohio |
| UBE | Alpha Prefix not assigned or unallocated |
| UBF | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UBG | BCBS of Michigan |
| UBH | BCBS of Minnesota |
| UBI | Alpha Prefix not assigned or unallocated |
| UBJ | Alpha Prefix not assigned or unallocated |
| UBK | Alpha Prefix not assigned or unallocated |
| UBL | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UBM | Anthem BCBS of Virginia |
| UBN | Alpha Prefix not assigned or unallocated |
| UBO | Blueshield of California |
| UBP | Wellmark BCBS of South Dakota/Iowa |
| UBQ | Alpha Prefix not assigned or unallocated |
| UBR | Anthem BCBS of Kentucky |
| UBS | Blueshield of California |
| UBT | Alpha Prefix not assigned or unallocated |
| UBU | Anthem BCBS of Virginia |
| UBV | Wellmark BCBS of South Dakota/Iowa |
| UBW | Alpha Prefix not assigned or unallocated |
| UBX | Wellmark BCBS of South Dakota/Iowa |
| UBY | Alpha Prefix not assigned or unallocated |
| UBZ | Anthem BCBS of Indiana |
| UCA | Anthem BCBS of Ohio |
| UCB | Premera BCBS of Alaska |
| UCC | BCBS of Michigan |
| UCD | Alpha Prefix not assigned or unallocated |
| UCE | BCBS of Texas |
| UCF | Alpha Prefix not assigned or unallocated |
| UCG | BCBS of Massachusetts |
| UCH | BCBS of Kansas City |
| UCI | BCBS of Michigan |
| UCJ | Horizon BCBS of New Jersey |
| UCK | BCBS of Michigan |
| UCL | Anthem BCBS of Colorado |
| UCM | Alpha Prefix not assigned or unallocated |
| UCN | BCBS of Alabama |
| UCO | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UCP | Wellmark BCBS of South Dakota/Iowa |
| UCQ | Anthem BCBS of Ohio |
| UCR | Anthem BCBS of Missouri |
| UCS | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| UCT | Alpha Prefix not assigned or unallocated |
| UCU | Alpha Prefix not assigned or unallocated |
| UCV | Alpha Prefix not assigned or unallocated |
| UCW | BCBS of Tennessee |
| UCX | Anthem BCBS of Ohio |
| UCY | Alpha Prefix not assigned or unallocated |
| UCZ | Alpha Prefix not assigned or unallocated |
| UDA | Premera BCBS of Alaska |
| UDB | Wellmark BCBS of South Dakota/Iowa |
| UDC | BCBS of Michigan |
| UDD | BCBS of Michigan |
| UDE | Anthem BCBS of Indiana |
| UDF | Alpha Prefix not assigned or unallocated |
| UDG | Alpha Prefix not assigned or unallocated |
| UDH | BCBS of Illinois |
| UDI | Anthem BCBS of Nevada |
| UDJ | Alpha Prefix not assigned or unallocated |
| UDK | Alpha Prefix not assigned or unallocated |
| UDL | BCBS of Illinois |
| UDM | Highmark BCBS of Pennsylvania |
| UDN | Anthem BCBS of Wisconsin |
| UDO | Anthem BCBS of Ohio |
| UDP | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UDQ | BCBS of Michigan |
| UDR | Anthem BCBS of Georgia |
| UDS | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UDT | Anthem BCBS of Indiana |
| UDU | Alpha Prefix not assigned or unallocated |
| UDV | Premera BCBS of Alaska |
| UDW | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| UDX | BCBS of Michigan |
| UDY | Anthem BCBS of Indiana |
| UDZ | Alpha Prefix not assigned or unallocated |
| UEA | BCBS of Kansas City |
| UEB | BCBS of Massachusetts |
| UEC | Blueshield of California |
| UED | Wellmark BCBS of South Dakota/Iowa |
| UEE | BCBS of Tennessee |
| UEF | Blueshield of California |
| UEG | Empire BCBS of New York |
| UEH | Anthem BCBS of Missouri |
| UEI | Anthem BCBS of Indiana |
| UEJ | BCBS of Illinois |
| UEK | Wellmark BCBS of South Dakota/Iowa |
| UEL | BCBS of Massachusetts |
| UEM | BCBS of Massachusetts |
| UEN | BCBS of Massachusetts |
| UEO | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| UEP | Alpha Prefix not assigned or unallocated |
| UEQ | Anthem BCBS of Missouri |
| UER | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UES | Empire BCBS of New York |
| UET | Anthem BCBS of Virginia |
| UEU | Alpha Prefix not assigned or unallocated |
| UEV | Alpha Prefix not assigned or unallocated |
| UEW | BCBS of Massachusetts |
| UEX | BCBS of Texas |
| UEY | Alpha Prefix not assigned or unallocated |
| UEZ | BCBS of Illinois |
| UFA | Anthem BCBS of Nevada |
| UFB | BCBS of Michigan |
| UFC | BCBS of Illinois |
| UFD | Horizon BCBS of New Jersey |
| UFE | Alpha Prefix not assigned or unallocated |
| UFF | Anthem BCBS of Ohio |
| UFG | BCBS of Michigan |
| UFH | BCBS of Michigan |
| UFI | Anthem BCBS of Ohio |
| UFJ | BCBS of Michigan |
| UFK | BCBS of Michigan |
| UFL | BCBS of Michigan |
| UFM | Alpha Prefix not assigned or unallocated |
| UFN | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UFO | Alpha Prefix not assigned or unallocated |
| UFP | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UFQ | BCBS of Michigan |
| UFR | BCBS of Western New York |
| UFS | Florida Blue |
| UFT | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UFU | Excellus BCBS of New York |
| UFV | BCBS of Michigan |
| UFW | BCBS of Illinois |
| UFX | BCBS of Michigan |
| UFY | Wellmark BCBS of South Dakota/Iowa |
| UFZ | Highmark BCBS of Pennsylvania |
| UGA | Florida Blue |
| UGB | Anthem Bluecross of California |
| UGC | Horizon BCBS of New Jersey |
| UGD | BCBS of Michigan |
| UGE | Alpha Prefix not assigned or unallocated |
| UGF | BCBS of Michigan |
| UGG | BCBS of Michigan |
| UGH | BCBS of Michigan |
| UGI | Alpha Prefix not assigned or unallocated |
| UGJ | Anthem Bluecross of California |
| UGK | Anthem Bluecross of California |
| UGL | Highmark BCBS of Pennsylvania |
| UGM | Alpha Prefix not assigned or unallocated |
| UGN | BCBS of Illinois |
| UGO | Anthem BCBS of Indiana |
| UGP | BCBS of Michigan |
| UGQ | Bluecross of Idaho |
| UGR | Anthem BCBS of New Hampshire |
| UGS | Anthem BCBS of New Hampshire |
| UGT | BCBS of Alabama |
| UGU | BCBS of Tennessee |
| UGV | BCBS of Minnesota |
| UGW | Anthem Bluecross of California |
| UGX | BCBS of Illinois |
| UGY | Horizon BCBS of New Jersey |
| UGZ | BCBS of Michigan |
| UHA | Alpha Prefix not assigned or unallocated |
| UHB | Alpha Prefix not assigned or unallocated |
| UHC | BCBS of Michigan |
| UHD | Anthem BCBS of Ohio |
| UHE | BCBS of Arizona |
| UHF | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UHG | Alpha Prefix not assigned or unallocated |
| UHH | Wellmark BCBS of South Dakota/Iowa |
| UHI | Anthem BCBS of Ohio |
| UHJ | BCBS of Michigan |
| UHK | Anthem BCBS of Ohio |
| UHL | BCBS of Arizona |
| UHM | BCBS of Massachusetts |
| UHN | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UHO | BCBS of Illinois |
| UHP | BCBS of Alabama |
| UHQ | Anthem BCBS of Ohio |
| UHR | Highmark BCBS of Pennsylvania |
| UHS | BCBS of Illinois |
| UHT | Anthem BCBS of Ohio |
| UHU | Anthem BCBS of Indiana |
| UHV | Anthem BCBS of Indiana |
| UHW | BCBS of Illinois |
| UHX | BCBS of Minnesota |
| UHY | Blueshield of Northeastern New York |
| UHZ | Blueshield of Northeastern New York |
| UIA | Alpha Prefix not assigned or unallocated |
| UIB | Alpha Prefix not assigned or unallocated |
| UIC | BCBS of Michigan |
| UID | Bluecross of Idaho |
| UIE | BCBS of Michigan |
| UIF | Florida Blue |
| UIG | Excellus BCBS of New York |
| UIH | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UII | BCBS of Michigan |
| UIJ | Anthem BCBS of Georgia |
| UIK | Anthem BCBS of Georgia |
| UIL | BCBS of Michigan |
| UIM | Premera BCBS of Alaska |
| UIN | BCBS of Michigan |
| UIO | BCBS of Michigan |
| UIP | Anthem Bluecross of California |
| UIQ | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UIR | BCBS of Michigan |
| UIS | Alpha Prefix not assigned or unallocated |
| UIT | Anthem BCBS of Colorado |
| UIU | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UIV | Premera BCBS of Alaska |
| UIW | BCBS of Michigan |
| UIX | Horizon BCBS of New Jersey |
| UIY | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UIZ | Alpha Prefix not assigned or unallocated |
| UJA | Anthem BCBS of Connecticut |
| UJB | Anthem BCBS of Missouri |
| UJC | BCBS of Illinois |
| UJD | Premera BCBS of Alaska |
| UJE | Alpha Prefix not assigned or unallocated |
| UJF | BCBS of Alabama |
| UJG | BCBS of Oklahoma |
| UJH | BCBS of Illinois |
| UJI | Anthem BCBS of Wisconsin |
| UJJ | Anthem BCBS of Wisconsin |
| UJK | Alpha Prefix not assigned or unallocated |
| UJL | Alpha Prefix not assigned or unallocated |
| UJM | Anthem BCBS of Wisconsin |
| UJN | Anthem BCBS of New Hampshire |
| UJO | Anthem BCBS of Ohio |
| UJP | BCBS of Illinois |
| UJQ | BCBS of Texas |
| UJR | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| UJS | Highmark BCBS of Pennsylvania |
| UJT | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| UJU | Alpha Prefix not assigned or unallocated |
| UJV | Alpha Prefix not assigned or unallocated |
| UJW | Alpha Prefix not assigned or unallocated |
| UJX | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UJY | Anthem BCBS of Wisconsin |
| UJZ | Anthem BCBS of Wisconsin |
| UKA | Alpha Prefix not assigned or unallocated |
| UKB | BCBS of Massachusetts |
| UKC | BCBS of Oklahoma |
| UKD | BCBS of Oklahoma |
| UKE | Anthem Bluecross of California |
| UKF | Alpha Prefix not assigned or unallocated |
| UKG | Alpha Prefix not assigned or unallocated |
| UKH | Empire BCBS of New York |
| UKI | Anthem BCBS of Georgia |
| UKJ | Empire BCBS of New York |
| UKK | Alpha Prefix not assigned or unallocated |
| UKL | BCBS of Texas |
| UKM | Alpha Prefix not assigned or unallocated |
| UKN | Bluecross of Idaho |
| UKO | Wellmark BCBS of South Dakota/Iowa |
| UKP | Alpha Prefix not assigned or unallocated |
| UKQ | Premera Bluecross of Alaska |
| UKR | Alpha Prefix not assigned or unallocated |
| UKS | Anthem BCBS of Missouri |
| UKT | Anthem Bluecross of California |
| UKU | BCBS of Tennessee |
| UKV | Alpha Prefix not assigned or unallocated |
| UKW | BCBS of Massachusetts |
| UKX | BCBS of Nebraska |
| UKY | Anthem BCBS of Ohio |
| UKZ | Alpha Prefix not assigned or unallocated |
| ULA | Anthem BCBS of Colorado |
| ULB | Anthem BCBS of Ohio |
| ULC | Anthem BCBS of Ohio |
| ULD | Premera BCBS of Alaska |
| ULE | BCBS of Illinois |
| ULF | BCBS of Illinois |
| ULG | Alpha Prefix not assigned or unallocated |
| ULH | Anthem BCBS of Kentucky |
| ULI | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| ULJ | BCBS of Michigan |
| ULK | BCBS of Western New York |
| ULL | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| ULM | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| ULN | BCBS of Kansas City |
| ULO | BCBS of Michigan |
| ULP | BCBS of Alabama |
| ULQ | Anthem BCBS of Ohio |
| ULR | Anthem BCBS of Georgia |
| ULS | Anthem BCBS of Ohio |
| ULT | BCBS of Illinois |
| ULU | Anthem BCBS of Ohio |
| ULV | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| ULW | Wellmark BCBS of South Dakota/Iowa |
| ULX | Alpha Prefix not assigned or unallocated |
| ULY | BCBS of Illinois |
| ULZ | BCBS of Tennessee |
| UMA | BCBS of Massachusetts |
| UMB | Bluecross of Idaho |
| UMC | BCBS of Minnesota |
| UMD | Highmark BCBS of Pennsylvania |
| UME | Florida Blue |
| UMF | BCBS of Illinois |
| UMG | Anthem Bluecross of California |
| UMH | Anthem BCBS of Ohio |
| UMI | BCBS of Massachusetts |
| UMJ | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UMK | BCBS of Michigan |
| UML | BCBS of Michigan |
| UMM | Anthem BCBS of Virginia |
| UMN | BCBS of Michigan |
| UMO | Anthem Bluecross of California |
| UMP | Alpha Prefix not assigned or unallocated |
| UMQ | Anthem BCBS of Nevada |
| UMR | Premera BCBS of Alaska |
| UMS | BCBS of Michigan |
| UMT | BCBS of Michigan |
| UMU | BCBS of Michigan |
| UMV | BCBS of Michigan |
| UMW | BCBS of Michigan |
| UMX | Premera BCBS of Alaska |
| UMY | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UMZ | Premera BCBS of Alaska |
| UNA | Anthem BCBS of Wisconsin |
| UNB | BCBS of Nebraska |
| UNC | BCBS of Michigan |
| UND | Alpha Prefix not assigned or unallocated |
| UNE | Alpha Prefix not assigned or unallocated |
| UNF | BCBS of Arizona |
| UNG | BCBS of North Carolina |
| UNH | Alpha Prefix not assigned or unallocated |
| UNI | Anthem BCBS of Wisconsin |
| UNJ | Anthem BCBS of Indiana |
| UNK | BCBS of Tennessee |
| UNL | Anthem Bluecross of California |
| UNM | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UNN | Premera BCBS of Alaska |
| UNO | Alpha Prefix not assigned or unallocated |
| UNP | BCBS of Michigan |
| UNQ | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UNR | Anthem Bluecross of California |
| UNS | Bluecross of Vermont |
| UNT | Bluecross of Vermont |
| UNU | Empire BCBS of New York |
| UNV | Anthem BCBS of Ohio |
| UNW | Florida Blue |
| UNX | Anthem BCBS of Connecticut |
| UNY | Alpha Prefix not assigned or unallocated |
| UNZ | Empire BCBS of New York |
| UOA | Alpha Prefix not assigned or unallocated |
| UOB | Wellmark BCBS of South Dakota/Iowa |
| UOC | BCBS of Illinois |
| UOD | Alpha Prefix not assigned or unallocated |
| UOE | BCBS of Illinois |
| UOF | BCBS of Michigan |
| UOG | Horizon BCBS of New Jersey |
| UOH | Premera BCBS of Alaska |
| UOI | Bluecross of Idaho |
| UOJ | Alpha Prefix not assigned or unallocated |
| UOK | Alpha Prefix not assigned or unallocated |
| UOL | Alpha Prefix not assigned or unallocated |
| UOM | BCBS of Michigan |
| UON | Wellmark BCBS of South Dakota/Iowa |
| UOO | BCBS of Michigan |
| UOP | Anthem BCBS of Ohio |
| UOQ | Horizon BCBS of New Jersey |
| UOR | Alpha Prefix not assigned or unallocated |
| UOS | Alpha Prefix not assigned or unallocated |
| UOT | Blueshield of California |
| UOU | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| UOV | Alpha Prefix not assigned or unallocated |
| UOW | Alpha Prefix not assigned or unallocated |
| UOX | Anthem BCBS of Ohio |
| UOY | BCBS of Michigan |
| UOZ | Highmark BCBS of Pennsylvania |
| UPA | BCBS of Illinois |
| UPB | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UPC | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UPD | Anthem BCBS of Wisconsin |
| UPE | Alpha Prefix not assigned or unallocated |
| UPF | Wellmark BCBS of South Dakota/Iowa |
| UPG | Anthem BCBS of Ohio |
| UPH | BCBS of Illinois |
| UPI | BCBS of Alabama |
| UPJ | Premera BCBS of Alaska |
| UPK | Alpha Prefix not assigned or unallocated |
| UPL | Alpha Prefix not assigned or unallocated |
| UPM | BCBS of Rhode Island |
| UPN | Alpha Prefix not assigned or unallocated |
| UPO | Blueshield of Northeastern New York |
| UPP | BCBS of Texas |
| UPQ | BCBS of Western New York |
| UPR | Alpha Prefix not assigned or unallocated |
| UPS | Wellmark BCBS of South Dakota/Iowa |
| UPT | BCBS of Illinois |
| UPU | Alpha Prefix not assigned or unallocated |
| UPV | Alpha Prefix not assigned or unallocated |
| UPW | Anthem BCBS of Nevada |
| UPX | BCBS of Texas |
| UPY | BCBS of Alabama |
| UPZ | Blueshield of California |
| UQA | BCBS of Western New York |
| UQB | Wellmark BCBS of South Dakota/Iowa |
| UQC | Alpha Prefix not assigned or unallocated |
| UQD | Wellmark BCBS of South Dakota/Iowa |
| UQE | Anthem BCBS of Wisconsin |
| UQF | Alpha Prefix not assigned or unallocated |
| UQG | Alpha Prefix not assigned or unallocated |
| UQH | Alpha Prefix not assigned or unallocated |
| UQI | Alpha Prefix not assigned or unallocated |
| UQJ | Alpha Prefix not assigned or unallocated |
| UQK | Anthem BCBS of Connecticut |
| UQL | Alpha Prefix not assigned or unallocated |
| UQM | Anthem BCBS of Kentucky |
| UQN | Alpha Prefix not assigned or unallocated |
| UQO | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| UQP | Anthem BCBS of Ohio |
| UQQ | BCBS of Michigan |
| UQR | Alpha Prefix not assigned or unallocated |
| UQS | Alpha Prefix not assigned or unallocated |
| UQT | BCBS of Western New York |
| UQU | BCBS of Michigan |
| UQV | Anthem BCBS of Ohio |
| UQW | Horizon BCBS of New Jersey |
| UQX | BCBS of South Carolina |
| UQY | BCBS of Rhode Island |
| UQZ | BCBS of Rhode Island |
| URA | BCBS of Illinois |
| URB | Alpha Prefix not assigned or unallocated |
| URC | Alpha Prefix not assigned or unallocated |
| URD | Alpha Prefix not assigned or unallocated |
| URE | BCBS of Texas |
| URF | Alpha Prefix not assigned or unallocated |
| URG | Alpha Prefix not assigned or unallocated |
| URH | Alpha Prefix not assigned or unallocated |
| URI | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| URJ | Anthem BCBS of Nevada |
| URK | BCBS of Illinois |
| URL | Excellus BCBS of New York |
| URM | Alpha Prefix not assigned or unallocated |
| URN | BCBS of Illinois |
| URO | BCBS of Michigan |
| URP | BCBS of Michigan |
| URQ | Highmark BCBS of Pennsylvania |
| URR | BCBS of South Carolina |
| URS | Blueshield of California |
| URT | Blueshield of California |
| URU | BCBS of Michigan |
| URV | BCBS of Illinois |
| URW | Wellmark BCBS of South Dakota/Iowa |
| URX | BCBS of Minnesota |
| URY | Anthem BCBS of Georgia |
| URZ | Alpha Prefix not assigned or unallocated |
| USA | Anthem Bluecross of California |
| USB | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| USC | Alpha Prefix not assigned or unallocated |
| USD | Alpha Prefix not assigned or unallocated |
| USE | BCBS of Texas |
| USF | Alpha Prefix not assigned or unallocated |
| USG | BCBS of Tennessee |
| USH | BCBS of Alabama |
| USI | Alpha Prefix not assigned or unallocated |
| USJ | Empire BCBS of New York |
| USK | BCBS of South Carolina |
| USL | Alpha Prefix not assigned or unallocated |
| USM | Blueshield of California |
| USN | BCBS of Tennessee |
| USO | Florida Blue |
| USP | Anthem BCBS of Ohio |
| USQ | Anthem BCBS of Ohio |
| USR | Excellus BCBS of New York |
| USS | BCBS of North Carolina |
| UST | BCBS of Illinois |
| USU | Empire BCBS of New York |
| USV | Anthem BCBS of Ohio |
| USW | Highmark BCBS of Pennsylvania |
| USX | Empire BCBS of New York |
| USY | BCBS of South Carolina |
| USZ | Alpha Prefix not assigned or unallocated |
| UTA | Anthem BCBS of Ohio |
| UTB | Anthem BCBS of Virginia |
| UTC | Bluecross of Idaho |
| UTD | BCBS of Illinois |
| UTE | Alpha Prefix not assigned or unallocated |
| UTF | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UTG | Anthem BCBS of Ohio |
| UTH | Alpha Prefix not assigned or unallocated |
| UTI | Alpha Prefix not assigned or unallocated |
| UTJ | Alpha Prefix not assigned or unallocated |
| UTK | BCBS of Arizona |
| UTL | BCBS of Illinois |
| UTM | Anthem Bluecross of California |
| UTN | BCBS of Illinois |
| UTO | Blueshield of California |
| UTP | Alpha Prefix not assigned or unallocated |
| UTQ | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UTR | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UTS | BCBS of Texas |
| UTT | Anthem BCBS of Ohio |
| UTU | Anthem BCBS of Georgia |
| UTV | BCBS of Illinois |
| UTW | Alpha Prefix not assigned or unallocated |
| UTX | Anthem BCBS of Connecticut |
| UTY | BCBS of Texas |
| UTZ | BCBS of Tennessee |
| UUA | Anthem BCBS of Georgia |
| UUB | Alpha Prefix not assigned or unallocated |
| UUC | BCBS of Oklahoma |
| UUD | Alpha Prefix not assigned or unallocated |
| UUE | Blueshield of California |
| UUF | BCBS of Illinois |
| UUG | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| UUH | Anthem BCBS of Missouri |
| UUI | BCBS of North Carolina |
| UUJ | Alpha Prefix not assigned or unallocated |
| UUK | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| UUL | BCBS of Tennessee |
| UUM | Alpha Prefix not assigned or unallocated |
| UUN | Alpha Prefix not assigned or unallocated |
| UUO | BCBS of Michigan |
| UUP | Anthem BCBS of Virginia |
| UUQ | Alpha Prefix not assigned or unallocated |
| UUR | Alpha Prefix not assigned or unallocated |
| UUS | Blueshield of California |
| UUT | Alpha Prefix not assigned or unallocated |
| UUU | Alpha Prefix not assigned or unallocated |
| UUV | Alpha Prefix not assigned or unallocated |
| UUW | Alpha Prefix not assigned or unallocated |
| UUX | BCBS of Illinois |
| UUY | Alpha Prefix not assigned or unallocated |
| UUZ | BCBS of Michigan |
| UVA | Anthem BCBS of Virginia |
| UVB | Anthem BCBS of Indiana |
| UVC | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UVD | Anthem BCBS of Virginia |
| UVE | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UVF | BCBS of Kansas City |
| UVG | Wellmark BCBS of South Dakota/Iowa |
| UVH | Alpha Prefix not assigned or unallocated |
| UVI | BCBS of Michigan |
| UVJ | Alpha Prefix not assigned or unallocated |
| UVK | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UVL | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| UVM | Alpha Prefix not assigned or unallocated |
| UVN | Alpha Prefix not assigned or unallocated |
| UVO | Alpha Prefix not assigned or unallocated |
| UVP | BCBS of Illinois |
| UVQ | Alpha Prefix not assigned or unallocated |
| UVR | Alpha Prefix not assigned or unallocated |
| UVS | BCBS of Illinois |
| UVT | Anthem BCBS of Virginia |
| UVU | BCBS of Alabama |
| UVV | Wellmark BCBS of South Dakota/Iowa |
| UVW | Empire BCBS of New York |
| UVX | Alpha Prefix not assigned or unallocated |
| UVY | Anthem Bluecross of California |
| UVZ | BCBS of Texas |
| UWA | BCBS of Michigan |
| UWB | Alpha Prefix not assigned or unallocated |
| UWC | Anthem BCBS of Wisconsin |
| UWD | Anthem Bluecross of California |
| UWE | Anthem BCBS of Ohio |
| UWF | BCBS of Michigan |
| UWG | BCBS of Michigan |
| UWH | Anthem BCBS of Ohio |
| UWI | Alpha Prefix not assigned or unallocated |
| UWJ | Alpha Prefix not assigned or unallocated |
| UWK | Alpha Prefix not assigned or unallocated |
| UWL | Alpha Prefix not assigned or unallocated |
| UWM | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UWN | BCBS of Illinois |
| UWO | Alpha Prefix not assigned or unallocated |
| UWP | BCBS of Rhode Island |
| UWQ | Empire BCBS of New York |
| UWR | Alpha Prefix not assigned or unallocated |
| UWS | Anthem BCBS of Connecticut |
| UWT | Horizon BCBS of New Jersey |
| UWU | BCBS of Tennessee |
| UWV | Alpha Prefix not assigned or unallocated |
| UWW | BCBS of Michigan |
| UWX | BCBS of Rhode Island |
| UWY | Alpha Prefix not assigned or unallocated |
| UWZ | Alpha Prefix not assigned or unallocated |
| UXA | Alpha Prefix not assigned or unallocated |
| UXB | BCBS of Alabama |
| UXC | Anthem Bluecross of California |
| UXD | BCBS of South Carolina |
| UXE | BCBS of Tennessee |
| UXF | Anthem Bluecross of California |
| UXG | BCBS of Michigan |
| UXH | Wellmark BCBS of South Dakota/Iowa |
| UXI | Horizon BCBS of New Jersey |
| UXJ | BCBS of Illinois |
| UXK | Alpha Prefix not assigned or unallocated |
| UXL | Highmark BCBS of Pennsylvania |
| UXM | BCBS of Illinois |
| UXN | Blueshield of California |
| UXO | BCBS of Michigan |
| UXP | Alpha Prefix not assigned or unallocated |
| UXQ | Anthem BCBS of Missouri |
| UXR | Wellmark BCBS of South Dakota/Iowa |
| UXS | Premera BCBS of Alaska |
| UXT | Anthem BCBS of Georgia |
| UXU | BCBS of Illinois |
| UXV | Anthem BCBS of Missouri |
| UXW | Horizon BCBS of New Jersey |
| UXX | BCBS of Michigan |
| UXY | Anthem BCBS of Missouri |
| UXZ | Anthem BCBS of Missouri |
| UYA | BCBS of Illinois |
| UYB | Anthem BCBS of Indiana |
| UYC | Empire BCBS of New York |
| UYD | Alpha Prefix not assigned or unallocated |
| UYE | BCBS of Massachusetts |
| UYF | Anthem Bluecross of California |
| UYG | Anthem BCBS of Virginia |
| UYH | Anthem BCBS of Indiana |
| UYI | BCBS of Michigan |
| UYJ | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| UYK | Anthem BCBS of Georgia |
| UYL | BCBS of Illinois |
| UYM | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UYN | Alpha Prefix not assigned or unallocated |
| UYO | Anthem BCBS of Georgia |
| UYP | Alpha Prefix not assigned or unallocated |
| UYQ | BCBS of Louisiana |
| UYR | Alpha Prefix not assigned or unallocated |
| UYS | Alpha Prefix not assigned or unallocated |
| UYT | Alpha Prefix not assigned or unallocated |
| UYU | BCBS of Arizona |
| UYV | Wellmark BCBS of South Dakota/Iowa |
| UYW | BCBS of Michigan |
| UYX | Alpha Prefix not assigned or unallocated |
| UYY | Anthem BCBS of Kentucky |
| UYZ | Bluecross of Idaho |
| UZA | Alpha Prefix not assigned or unallocated |
| UZB | Wellmark BCBS of South Dakota/Iowa |
| UZC | Anthem Bluecross of California |
| UZD | Blueshield of California |
| UZE | Highmark BCBS of Pennsylvania |
| UZF | Alpha Prefix not assigned or unallocated |
| UZG | BCBS of Michigan |
| UZH | Wellmark BCBS of South Dakota/Iowa |
| UZI | Alpha Prefix not assigned or unallocated |
| UZJ | Alpha Prefix not assigned or unallocated |
| UZK | Wellmark BCBS of South Dakota/Iowa |
| UZL | Alpha Prefix not assigned or unallocated |
| UZM | BCBS of Louisiana |
| UZN | Florida Blue |
| UZO | Anthem BCBS of Georgia |
| UZP | Anthem Bluecross of California |
| UZQ | Anthem BCBS of Connecticut |
| UZR | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| UZS | BCBS of Texas |
| UZT | Anthem BCBS of Colorado |
| UZU | Alpha Prefix not assigned or unallocated |
| UZV | BCBS of Michigan |
| UZW | BCBS of Michigan |
| UZX | Alpha Prefix not assigned or unallocated |
| UZY | BCBS of Michigan |
| UZZ | BCBS of Texas |