| FAA | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| FAB | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FAC | Vermont | Blue-Cross Blue-Shield of Vermont |
| FAD | Illinois | Blue-Cross Blue-Shield of Illinois |
| FAE | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FAF | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FAG | - | Unallocated/Not Assigned |
| FAH | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FAI | - | Unallocated/Not Assigned |
| FAJ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FAK | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FAL | California | Anthem Blue-Cross |
| FAM | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FAN | - | Unallocated/Not Assigned |
| FAO | Vermont | Blue-Cross Blue-Shield of Vermont |
| FAP | - | Unallocated/Not Assigned |
| FAQ | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| FAR | California | Anthem Blue-Cross |
| FAS | California | Anthem Blue-Cross |
| FAT | - | Unallocated/Not Assigned |
| FAU | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FAV | - | Unallocated/Not Assigned |
| FAW | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FAX | Illinois | Blue-Cross Blue-Shield of Illinois |
| FAY | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FAZ | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FBA | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| FBB | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| FBC | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FBD | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FBE | - | Unallocated/Not Assigned |
| FBF | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FBG | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FBH | Florida | Florida-Blue |
| FBI | - | Unallocated/Not Assigned |
| FBJ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FBK | - | Unallocated/Not Assigned |
| FBL | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| FBM | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| FBN | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FBO | - | Unallocated/Not Assigned |
| FBP | Michigan | Blue-Cross Blue-Shield of Michigan |
| FBQ | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| FBR | Illinois | Blue-Cross Blue-Shield of Illinois |
| FBS | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FBT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FBU | - | Unallocated/Not Assigned |
| FBV | - | Unallocated/Not Assigned |
| FBW | - | Unallocated/Not Assigned |
| FBX | - | Unallocated/Not Assigned |
| FBY | Arkansas | Arkansas Blue-Cross Blue-Shield |
| FBZ | Michigan | Blue-Cross Blue-Shield of Michigan |
| FCA | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| FCB | - | Unallocated/Not Assigned |
| FCC | Illinois | Blue-Cross Blue-Shield of Illinois |
| FCD | Illinois | Blue-Cross Blue-Shield of Illinois |
| FCE | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| FCF | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FCG | California | Anthem Blue-Cross |
| FCH | - | Unallocated/Not Assigned |
| FCI | - | Unallocated/Not Assigned |
| FCJ | Idaho | Blue-Cross of Idaho |
| FCK | - | Unallocated/Not Assigned |
| FCL | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| FCM | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FCN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FCO | California | Blue-Shield of California |
| FCP | - | Unallocated/Not Assigned |
| FCQ | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FCR | - | Unallocated/Not Assigned |
| FCS | Illinois | Blue-Cross Blue-Shield of Illinois |
| FCT | Nevada | Anthem Blue-Cross Blue-Shield of Nevada |
| FCU | Illinois | Blue-Cross Blue-Shield of Illinois |
| FCV | - | Unallocated/Not Assigned |
| FCW | Michigan | Blue-Cross Blue-Shield of Michigan |
| FCX | California | Anthem Blue-Cross |
| FCY | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FCZ | California | Blue-Shield of California |
| FDA | Michigan | Blue-Cross Blue-Shield of Michigan |
| FDB | Michigan | Blue-Cross Blue-Shield of Michigan |
| FDC | Illinois | Blue-Cross Blue-Shield of Illinois |
| FDD | New York | Empire Blue-Cross Blue-Shield of New York |
| FDE | - | Unallocated/Not Assigned |
| FDF | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FDG | Illinois | Blue-Cross Blue-Shield of Illinois |
| FDH | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FDI | California | Blue-Shield of California |
| FDJ | Florida | Florida-Blue |
| FDK | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FDL | Florida | Florida-Blue |
| FDM | New York | Empire Blue-Cross Blue-Shield of New York |
| FDN | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FDO | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| FDP | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FDQ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FDR | - | Unallocated/Not Assigned |
| FDS | California | Anthem Blue-Cross |
| FDT | New York | Empire Blue-Cross Blue-Shield of New York |
| FDU | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FDV | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FDW | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| FDX | - | Unallocated/Not Assigned |
| FDY | - | Unallocated/Not Assigned |
| FDZ | California | Blue-Shield of California |
| FEA | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FEB | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| FEC | - | Unallocated/Not Assigned |
| FED | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FEE | Florida | Florida-Blue |
| FEF | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| FEG | - | Unallocated/Not Assigned |
| FEH | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FEI | - | Unallocated/Not Assigned |
| FEJ | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| FEK | Alabama | Blue-Cross Blue-Shield of Alabama |
| FEL | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FEM | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FEN | - | Unallocated/Not Assigned |
| FEO | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| FEP | - | Unallocated/Not Assigned |
| FEQ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FER | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FES | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FET | Michigan | Blue-Cross Blue-Shield of Michigan |
| FEU | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FEV | - | Unallocated/Not Assigned |
| FEW | California | Anthem Blue-Cross |
| FEX | California | Anthem Blue-Cross |
| FEY | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FEZ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FFA | Michigan | Blue-Cross Blue-Shield of Michigan |
| FFB | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| FFC | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FFD | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FFE | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FFF | - | Unallocated/Not Assigned |
| FFG | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FFH | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FFI | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| FFJ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FFK | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FFL | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FFM | Texas | Blue-Cross Blue-Shield of Texas |
| FFN | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| FFO | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FFP | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| FFQ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FFR | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FFS | California | Anthem Blue-Cross |
| FFT | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| FFU | Florida | Florida-Blue |
| FFV | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| FFW | - | Unallocated/Not Assigned |
| FFX | - | Unallocated/Not Assigned |
| FFY | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FFZ | Texas | Blue-Cross Blue-Shield of Texas |
| FGA | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FGB | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| FGC | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FGD | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FGE | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FGF | - | Unallocated/Not Assigned |
| FGG | Florida | Florida-Blue |
| FGH | - | Unallocated/Not Assigned |
| FGI | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FGJ | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| FGK | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FGL | Texas | Blue-Cross Blue-Shield of Texas |
| FGM | California | Anthem Blue-Cross |
| FGN | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FGO | - | Unallocated/Not Assigned |
| FGP | Michigan | Blue-Cross Blue-Shield of Michigan |
| FGQ | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| FGR | Alabama | Blue-Cross Blue-Shield of Alabama |
| FGS | Michigan | Blue-Cross Blue-Shield of Michigan |
| FGT | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FGU | Michigan | Blue-Cross Blue-Shield of Michigan |
| FGV | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FGW | California | Anthem Blue-Cross |
| FGX | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FGY | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FGZ | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| FHA | Illinois | Blue-Cross Blue-Shield of Illinois |
| FHB | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FHC | Michigan | Blue-Cross Blue-Shield of Michigan |
| FHD | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| FHE | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| FHF | - | Unallocated/Not Assigned |
| FHG | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FHH | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FHI | Michigan | Blue-Cross Blue-Shield of Michigan |
| FHJ | Florida | Florida-Blue |
| FHK | - | Unallocated/Not Assigned |
| FHL | Illinois | Blue-Cross Blue-Shield of Illinois |
| FHM | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FHN | Michigan | Blue-Cross Blue-Shield of Michigan |
| FHO | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FHP | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FHQ | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| FHR | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FHS | Idaho | Blue-Cross of Idaho |
| FHT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FHU | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| FHV | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FHW | Florida | Florida-Blue |
| FHX | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FHY | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FHZ | - | Unallocated/Not Assigned |
| FIA | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| FIB | - | Unallocated/Not Assigned |
| FIC | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FID | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| FIE | Michigan | Blue-Cross Blue-Shield of Michigan |
| FIF | - | Unallocated/Not Assigned |
| FIG | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| FIH | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| FII | - | Unallocated/Not Assigned |
| FIJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| FIK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FIL | Michigan | Blue-Cross Blue-Shield of Michigan |
| FIM | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FIN | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FIO | Michigan | Blue-Cross Blue-Shield of Michigan |
| FIP | Idaho | Blue-Cross of Idaho |
| FIQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| FIR | Florida | Florida-Blue |
| FIS | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| FIT | Alaska | Premera Blue-Cross of Alaska |
| FIU | Michigan | Blue-Cross Blue-Shield of Michigan |
| FIV | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| FIW | - | Unallocated/Not Assigned |
| FIX | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FIY | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| FIZ BCBS Prefix | Florida | Florida-Blue |
| FJA | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FJB BCBS Prefix | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FJC | Illinois | Blue-Cross Blue-Shield of Illinois |
| FJD | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FJE | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FJF BCBS Prefix | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FJG | - | Unallocated/Not Assigned |
| FJH | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FJI | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FJJ | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FJK | - | Unallocated/Not Assigned |
| FJL | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| FJM | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| FJN | Illinois | Blue-Cross Blue-Shield of Illinois |
| FJO | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| FJP | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FJQ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FJR | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FJS | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FJT | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| FJU | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FJV | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FJW | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| FJX | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FJY | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FJZ | California | Anthem Blue-Cross |
| FKA | Illinois | Blue-Cross Blue-Shield of Illinois |
| FKB | - | Unallocated/Not Assigned |
| FKC | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FKD | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FKE | Michigan | Blue-Cross Blue-Shield of Michigan |
| FKF | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| FKG | - | Unallocated/Not Assigned |
| FKH | - | Unallocated/Not Assigned |
| FKI | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FKJ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FKK | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| FKL | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FKM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FKN | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FKO | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FKP | California | Anthem Blue-Cross |
| FKQ | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| FKR | - | Unallocated/Not Assigned |
| FKS | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FKT | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FKU | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| FKV | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FKW | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| FKX | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FKY | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| FKZ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FLA | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FLB | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FLC | - | Unallocated/Not Assigned |
| FLD | - | Unallocated/Not Assigned |
| FLE | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FLF | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| FLG | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| FLH | Arizona | Blue-Cross Blue-Shield of Arizona |
| FLI | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FLJ | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| FLK | Illinois | Blue-Cross Blue-Shield of Illinois |
| FLL | California | Anthem Blue-Cross |
| FLM | - | Unallocated/Not Assigned |
| FLN | New York (Northeastern) | Blue-Shield of Northeastern New York |
| FLO | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FLP | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| FLQ | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FLR | - | Unallocated/Not Assigned |
| FLS | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FLT | Florida | Florida-Blue |
| FLU | - | Unallocated/Not Assigned |
| FLV | Texas | Blue-Cross Blue-Shield of Texas |
| FLW | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| FLX | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FLY | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FLZ | California | Anthem Blue-Cross |
| FMA | Michigan | Blue-Cross Blue-Shield of Michigan |
| FMB | Illinois | Blue-Cross Blue-Shield of Illinois |
| FMC | - | Unallocated/Not Assigned |
| FMD | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FME | Idaho | Blue-Cross of Idaho |
| FMF | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FMG | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FMH | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FMI | California | Blue-Shield of California |
| FMJ | New York | Empire Blue-Cross Blue-Shield of New York |
| FMK | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FML | Michigan | Blue-Cross Blue-Shield of Michigan |
| FMM | Michigan | Blue-Cross Blue-Shield of Michigan |
| FMN | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FMO | Alabama | Blue-Cross Blue-Shield of Alabama |
| FMP | - | Unallocated/Not Assigned |
| FMQ | - | Unallocated/Not Assigned |
| FMR | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| FMS | Texas | Blue-Cross Blue-Shield of Texas |
| FMT | Illinois | Blue-Cross Blue-Shield of Illinois |
| FMU | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FMV | Michigan | Blue-Cross Blue-Shield of Michigan |
| FMW | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FMX | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FMY | - | Unallocated/Not Assigned |
| FMZ | - | Unallocated/Not Assigned |
| FNA | Texas | Blue-Cross Blue-Shield of Texas |
| FNB | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FNC | - | Unallocated/Not Assigned |
| FND | Michigan | Blue-Cross Blue-Shield of Michigan |
| FNE | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FNF | - | Unallocated/Not Assigned |
| FNG | Illinois | Blue-Cross Blue-Shield of Illinois |
| FNH | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FNI | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FNJ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FNK | - | Unallocated/Not Assigned |
| FNL | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FNM | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FNN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FNO | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| FNP | - | Unallocated/Not Assigned |
| FNQ | California | Anthem Blue-Cross |
| FNR | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| FNS | California | Anthem Blue-Cross |
| FNT | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| FNU | Michigan | Blue-Cross Blue-Shield of Michigan |
| FNV | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FNW | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FNX | - | Unallocated/Not Assigned |
| FNY | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| FNZ | Illinois | Blue-Cross Blue-Shield of Illinois |
| FOA | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| FOB | Florida | Florida-Blue |
| FOC | California | Blue-Shield of California |
| FOD | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FOE | - | Unallocated/Not Assigned |
| FOF | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FOG | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FOH | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| FOI | - | Unallocated/Not Assigned |
| FOJ | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| FOK | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FOL | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FOM | - | Unallocated/Not Assigned |
| FON | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FOO | California | Blue-Shield of California |
| FOP | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FOQ | - | Unallocated/Not Assigned |
| FOR | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FOS | - | Unallocated/Not Assigned |
| FOT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FOU | Alabama | Blue-Cross Blue-Shield of Alabama |
| FOV | - | Unallocated/Not Assigned |
| FOW | - | Unallocated/Not Assigned |
| FOX | Illinois | Blue-Cross Blue-Shield of Illinois |
| FOY | - | Unallocated/Not Assigned |
| FOZ | - | Unallocated/Not Assigned |
| FPA | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FPB | - | Unallocated/Not Assigned |
| FPC | Illinois | Blue-Cross Blue-Shield of Illinois |
| FPD | California | Anthem Blue-Cross |
| FPE | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FPF | California | Anthem Blue-Cross |
| FPG | - | Unallocated/Not Assigned |
| FPH | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FPI | - | Unallocated/Not Assigned |
| FPJ | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FPK | California | Blue-Shield of California |
| FPL | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FPM | Michigan | Blue-Cross Blue-Shield of Michigan |
| FPN | - | Unallocated/Not Assigned |
| FPO | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FPP | - | Unallocated/Not Assigned |
| FPQ | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FPR | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FPS | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FPT | - | Unallocated/Not Assigned |
| FPU | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FPV | California | Blue-Shield of California |
| FPW | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FPX | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FPY | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| FPZ | California | Anthem Blue-Cross |
| FQA | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| FQB | - | Unallocated/Not Assigned |
| FQC | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FQD | - | Unallocated/Not Assigned |
| FQE | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| FQF | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FQG | - | Unallocated/Not Assigned |
| FQH | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FQI | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FQJ | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| FQK | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FQL | Arizona | Blue-Cross Blue-Shield of Arizona |
| FQM | - | Unallocated/Not Assigned |
| FQN | Illinois | Blue-Cross Blue-Shield of Illinois |
| FQO | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FQP | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FQQ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FQR | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FQS | - | Unallocated/Not Assigned |
| FQT | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| FQU | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| FQV | California | Blue-Shield of California |
| FQW | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| FQX | - | Unallocated/Not Assigned |
| FQY | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FQZ | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FRA | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FRB | Illinois | Blue-Cross Blue-Shield of Illinois |
| FRC | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FRD | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FRE | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FRF | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FRG | Texas | Blue-Cross Blue-Shield of Texas |
| FRH | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| FRI | California | Blue-Shield of California |
| FRJ | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| FRK | - | Unallocated/Not Assigned |
| FRL | - | Unallocated/Not Assigned |
| FRM | - | Unallocated/Not Assigned |
| FRN | Texas | Blue-Cross Blue-Shield of Texas |
| FRO | Michigan | Blue-Cross Blue-Shield of Michigan |
| FRP | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FRQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| FRR | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FRS | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FRT | - | Unallocated/Not Assigned |
| FRU | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FRV | Alabama | Blue-Cross Blue-Shield of Alabama |
| FRW | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| FRX | California | Anthem Blue-Cross |
| FRY | - | Unallocated/Not Assigned |
| FRZ | - | Unallocated/Not Assigned |
| FSA | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FSB | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| FSC | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| FSD | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| FSE | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FSF | New York | Empire Blue-Cross Blue-Shield of New York |
| FSG | Illinois | Blue-Cross Blue-Shield of Illinois |
| FSH | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| FSI | - | Unallocated/Not Assigned |
| FSJ | Arizona | Blue-Cross Blue-Shield of Arizona |
| FSK | - | Unallocated/Not Assigned |
| FSL | Illinois | Blue-Cross Blue-Shield of Illinois |
| FSM | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FSN | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FSO | Florida | Florida-Blue |
| FSP | Michigan | Blue-Cross Blue-Shield of Michigan |
| FSQ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FSR | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| FSS | - | Unallocated/Not Assigned |
| FST | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| FSU | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FSV | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| FSW | Illinois | Blue-Cross Blue-Shield of Illinois |
| FSX | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| FSY | - | Unallocated/Not Assigned |
| FSZ | - | Unallocated/Not Assigned |
| FTA | California | Anthem Blue-Cross |
| FTB | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FTC | Oklahoma | Blue-Cross Blue-Shield of Oklahoma |
| FTD | Illinois | Blue-Cross Blue-Shield of Illinois |
| FTE | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FTF | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FTG | California | Blue-Shield of California |
| FTH | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FTI | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| FTJ | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FTK | - | Unallocated/Not Assigned |
| FTL | - | Unallocated/Not Assigned |
| FTM | - | Unallocated/Not Assigned |
| FTN | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FTO | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| FTP | - | Unallocated/Not Assigned |
| FTQ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FTR | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| FTS | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| FTT | California | Blue-Shield of California |
| FTU | - | Unallocated/Not Assigned |
| FTV | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FTW | - | Unallocated/Not Assigned |
| FTX | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FTY | Illinois | Blue-Cross Blue-Shield of Illinois |
| FTZ | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FUA | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FUB | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FUC | - | Unallocated/Not Assigned |
| FUD | - | Unallocated/Not Assigned |
| FUE | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| FUF | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FUG | Texas | Blue-Cross Blue-Shield of Texas |
| FUH | - | Unallocated/Not Assigned |
| FUI | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| FUJ | - | Unallocated/Not Assigned |
| FUK | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FUL | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| FUM | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FUN | Illinois | Blue-Cross Blue-Shield of Illinois |
| FUO | Florida | Florida-Blue |
| FUP | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FUQ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FUR | - | Unallocated/Not Assigned |
| FUS | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FUT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FUU | - | Unallocated/Not Assigned |
| FUV | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FUW | California | Anthem Blue-Cross |
| FUX | - | Unallocated/Not Assigned |
| FUY | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| FUZ | - | Unallocated/Not Assigned |
| FVA | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FVB | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| FVC | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| FVD | - | Unallocated/Not Assigned |
| FVE | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FVF | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FVG | - | Unallocated/Not Assigned |
| FVH | - | Unallocated/Not Assigned |
| FVI BCBS Prefix | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FVJ | - | Unallocated/Not Assigned |
| FVK | - | Unallocated/Not Assigned |
| FVL | Illinois | Blue-Cross Blue-Shield of Illinois |
| FVM | California | Anthem Blue-Cross |
| FVN | Michigan | Blue-Cross Blue-Shield of Michigan |
| FVO | - | Unallocated/Not Assigned |
| FVP | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FVQ | - | Unallocated/Not Assigned |
| FVR | - | Unallocated/Not Assigned |
| FVS | California | Blue-Shield of California |
| FVT | Vermont | Blue-Cross Blue-Shield of Vermont |
| FVU | Texas | Blue-Cross Blue-Shield of Texas |
| FVV | Michigan | Blue-Cross Blue-Shield of Michigan |
| FVW | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FVX | Illinois | Blue-Cross Blue-Shield of Illinois |
| FVY | - | Unallocated/Not Assigned |
| FVZ | - | Unallocated/Not Assigned |
| FWA | Illinois | Blue-Cross Blue-Shield of Illinois |
| FWB | Illinois | Blue-Cross Blue-Shield of Illinois |
| FWC | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| FWD | Illinois | Blue-Cross Blue-Shield of Illinois |
| FWE | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FWF | Illinois | Blue-Cross Blue-Shield of Illinois |
| FWG | - | Unallocated/Not Assigned |
| FWH | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FWI | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FWJ | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FWK | - | Unallocated/Not Assigned |
| FWL | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FWM | Illinois | Blue-Cross Blue-Shield of Illinois |
| FWN | Florida | Florida-Blue |
| FWO | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FWP | - | Unallocated/Not Assigned |
| FWQ | - | Unallocated/Not Assigned |
| FWR | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FWS | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FWT | Arkansas | Arkansas Blue-Cross Blue-Shield |
| FWU | - | Unallocated/Not Assigned |
| FWV | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FWW | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FWX | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FWY | Illinois | Blue-Cross Blue-Shield of Illinois |
| FWZ | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FXA | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| FXB | California | Anthem Blue-Cross |
| FXC | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FXD | California | Anthem Blue-Cross |
| FXE | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FXF | California | Anthem Blue-Cross |
| FXG | California | Anthem Blue-Cross |
| FXH | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| FXI | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| FXJ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FXK | California | Anthem Blue-Cross |
| FXL | California | Anthem Blue-Cross |
| FXM | California | Anthem Blue-Cross |
| FXN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FXO | - | Unallocated/Not Assigned |
| FXP | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FXQ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FXR | Illinois | Blue-Cross Blue-Shield of Illinois |
| FXS | Texas | Blue-Cross Blue-Shield of Texas |
| FXT | - | Unallocated/Not Assigned |
| FXU | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FXV | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FXW | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FXX | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FXY | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| FXZ BCBS Prefix | California | Anthem Blue-Cross |
| FYA | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FYB | - | Unallocated/Not Assigned |
| FYC | - | Unallocated/Not Assigned |
| FYD | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| FYE | - | Unallocated/Not Assigned |
| FYF | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FYG | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FYH | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| FYI | - | Unallocated/Not Assigned |
| FYJ | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FYK | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| FYL | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FYM | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| FYN | Florida | Florida-Blue |
| FYO | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FYP | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| FYQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| FYR | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FYS | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FYT | - | Unallocated/Not Assigned |
| FYU | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| FYV | - | Unallocated/Not Assigned |
| FYW | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| FYX | - | Unallocated/Not Assigned |
| FYY | Idaho | Blue-Cross of Idaho |
| FYZ | Florida | Florida-Blue |
| FZA | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| FZB | Idaho | Blue-Cross of Idaho |
| FZC | New York | Empire Blue-Cross Blue-Shield of New York |
| FZD | Michigan | Blue-Cross Blue-Shield of Michigan |
| FZE | California | Anthem Blue-Cross |
| FZF | Idaho | Blue-Cross of Idaho |
| FZG | - | Unallocated/Not Assigned |
| FZH | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FZI | - | Unallocated/Not Assigned |
| FZJ | New York | Empire Blue-Cross Blue-Shield of New York |
| FZK | - | Unallocated/Not Assigned |
| FZL | - | Unallocated/Not Assigned |
| FZM | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| FZN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| FZO | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| FZP | Michigan | Blue-Cross Blue-Shield of Michigan |
| FZQ | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| FZR | Arizona | Blue-Cross Blue-Shield of Arizona |
| FZS | - | Unallocated/Not Assigned |
| FZT | Illinois | Blue-Cross Blue-Shield of Illinois |
| FZU | Florida | Florida-Blue |
| FZV | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| FZW | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| FZX | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| FZY | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| FZZ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |