| GAA | - | Unallocated/Not Assigned |
| GAB | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GAC | Illinois | Blue-Cross Blue-Shield of Illinois |
| GAD | California | Blue-Shield of California |
| GAE | California | Anthem Blue-Cross |
| GAF | Illinois | Blue-Cross Blue-Shield of Illinois |
| GAG | Texas | Blue-Cross Blue-Shield of Texas |
| GAH | New York | Excellus Blue-Cross Blue-Shield of New York |
| GAI | - | Unallocated/Not Assigned |
| GAJ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GAK | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GAL | - | Unallocated/Not Assigned |
| GAM | Texas | Blue-Cross Blue-Shield of Texas |
| GAN | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GAO | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GAP | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GAQ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GAR | - | Unallocated/Not Assigned |
| GAS | Arkansas | Arkansas Blue-Cross Blue-Shield |
| GAT | Alabama | Blue-Cross Blue-Shield of Alabama |
| GAU | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GAV | - | Unallocated/Not Assigned |
| GAW | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GAX | - | Unallocated/Not Assigned |
| GAY | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GAZ | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| GBA | Montana | Blue-Cross Blue-Shield of Montana |
| GBB | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GBC | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GBD | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| GBE | Michigan | Blue-Cross Blue-Shield of Michigan |
| GBF | Illinois | Blue-Cross Blue-Shield of Illinois |
| GBG | Michigan | Blue-Cross Blue-Shield of Michigan |
| GBH | Illinois | Blue-Cross Blue-Shield of Illinois |
| GBI | California | Blue-Shield of California |
| GBJ | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GBK | - | Unallocated/Not Assigned |
| GBL | - | Unallocated/Not Assigned |
| GBM | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GBN | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GBO | - | Unallocated/Not Assigned |
| GBP | - | Unallocated/Not Assigned |
| GBQ | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| GBR | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| GBS | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GBT | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GBU | California | Anthem Blue-Cross |
| GBV | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GBW | Illinois | Blue-Cross Blue-Shield of Illinois |
| GBX | Illinois | Blue-Cross Blue-Shield of Illinois |
| GBY | - | Unallocated/Not Assigned |
| GBZ | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| GCA | Alabama | Blue-Cross Blue-Shield of Alabama |
| GCB | - | Unallocated/Not Assigned |
| GCC | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GCD | California | Anthem Blue-Cross |
| GCE | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GCF | California | Anthem Blue-Cross |
| GCG | California | Blue-Shield of California |
| GCH | - | Unallocated/Not Assigned |
| GCI | California | Blue-Shield of California |
| GCJ | New York | Empire Blue-Cross Blue-Shield of New York |
| GCK | - | Unallocated/Not Assigned |
| GCL | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| GCM | - | Unallocated/Not Assigned |
| GCN | - | Unallocated/Not Assigned |
| GCO | - | Unallocated/Not Assigned |
| GCP | - | Unallocated/Not Assigned |
| GCQ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GCR | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GCS | - | Unallocated/Not Assigned |
| GCT | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GCU | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GCV | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| GCW | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GCX | Alabama | Blue-Cross Blue-Shield of Alabama |
| GCY | - | Unallocated/Not Assigned |
| GCZ | - | Unallocated/Not Assigned |
| GDA | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| GDB | California | Anthem Blue-Cross |
| GDC | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| GDD | California | Anthem Blue-Cross |
| GDE | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| GDF | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| GDG | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GDH | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GDI | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| GDJ | - | Unallocated/Not Assigned |
| GDK | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| GDL | Michigan | Blue-Cross Blue-Shield of Michigan |
| GDM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GDN | Michigan | Blue-Cross Blue-Shield of Michigan |
| GDO | - | Unallocated/Not Assigned |
| GDP | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GDQ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GDR | - | Unallocated/Not Assigned |
| GDS | New York | Empire Blue-Cross Blue-Shield of New York |
| GDT | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GDU | Illinois | Blue-Cross Blue-Shield of Illinois |
| GDV | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GDW | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GDX | - | Unallocated/Not Assigned |
| GDY | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| GDZ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GEA | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GEB | - | Unallocated/Not Assigned |
| GEC | Alabama | Blue-Cross Blue-Shield of Alabama |
| GED | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GEE | California | Blue-Shield of California |
| GEF | - | Unallocated/Not Assigned |
| GEG | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GEH | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GEI | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| GEJ | Arkansas | Arkansas Blue-Cross Blue-Shield |
| GEK | - | Unallocated/Not Assigned |
| GEL | - | Unallocated/Not Assigned |
| GEM | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GEN | Alabama | Blue-Cross Blue-Shield of Alabama |
| GEO | California | Anthem Blue-Cross |
| GEP | Alabama | Blue-Cross Blue-Shield of Alabama |
| GEQ | - | Unallocated/Not Assigned |
| GER | - | Unallocated/Not Assigned |
| GES | California | Anthem Blue-Cross |
| GET | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GEU | Illinois | Blue-Cross Blue-Shield of Illinois |
| GEV | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| GEW | - | Unallocated/Not Assigned |
| GEX | Alabama | Blue-Cross Blue-Shield of Alabama |
| GEY | - | Unallocated/Not Assigned |
| GEZ | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GFA | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GFB | California | Anthem Blue-Cross |
| GFC | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| GFD BCBS Prefix | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| GFE | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GFF | California | Anthem Blue-Cross |
| GFG | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GFH | - | Unallocated/Not Assigned |
| GFI | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GFJ | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| GFK | - | Unallocated/Not Assigned |
| GFL | Illinois | Blue-Cross Blue-Shield of Illinois |
| GFM BCBS Prefix | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GFN | - | Unallocated/Not Assigned |
| GFO | - | Unallocated/Not Assigned |
| GFP | Michigan | Blue-Cross Blue-Shield of Michigan |
| GFQ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GFR | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GFS | - | Unallocated/Not Assigned |
| GFT | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GFU | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| GFV | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GFW | - | Unallocated/Not Assigned |
| GFX | Texas | Blue-Cross Blue-Shield of Texas |
| GFY | - | Unallocated/Not Assigned |
| GFZ | New York | Empire Blue-Cross Blue-Shield of New York |
| GGA | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GGB | California | Blue-Shield of California |
| GGC | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GGD | California | Blue-Shield of California |
| GGE | - | Unallocated/Not Assigned |
| GGF | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GGG | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GGH | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GGI | Arizona | Blue-Cross Blue-Shield of Arizona |
| GGJ | - | Unallocated/Not Assigned |
| GGK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GGL | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GGM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GGN | New York | Empire Blue-Cross Blue-Shield of New York |
| GGO | Michigan | Blue-Cross Blue-Shield of Michigan |
| GGP | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GGQ | California | Anthem Blue-Cross |
| GGR | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| GGS BCBS Prefix | California | Anthem Blue-Cross |
| GGT | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GGU | - | Unallocated/Not Assigned |
| GGV | Arkansas | Arkansas Blue-Cross Blue-Shield |
| GGW | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GGX | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GGY | - | Unallocated/Not Assigned |
| GGZ | Illinois | Blue-Cross Blue-Shield of Illinois |
| GHA | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| GHB | - | Unallocated/Not Assigned |
| GHC | - | Unallocated/Not Assigned |
| GHD | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| GHE | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| GHF | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GHG | Texas | Blue-Cross Blue-Shield of Texas |
| GHH | - | Unallocated/Not Assigned |
| GHI | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| GHJ | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GHK | Florida | Florida-Blue |
| GHL | - | Unallocated/Not Assigned |
| GHM | Texas | Blue-Cross Blue-Shield of Texas |
| GHN | Illinois | Blue-Cross Blue-Shield of Illinois |
| GHO | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GHP BCBS Prefix | Michigan | Blue-Cross Blue-Shield of Michigan |
| GHQ | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| GHR | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GHS | New York | Excellus Blue-Cross Blue-Shield of New York |
| GHT | - | Unallocated/Not Assigned |
| GHU | Arizona | Blue-Cross Blue-Shield of Arizona |
| GHV | Texas | Blue-Cross Blue-Shield of Texas |
| GHW | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GHX | Illinois | Blue-Cross Blue-Shield of Illinois |
| GHY | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GHZ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GIA | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GIB | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| GIC | California | Anthem Blue-Cross |
| GID | Alabama | Blue-Cross Blue-Shield of Alabama |
| GIE | California | Anthem Blue-Cross |
| GIF | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| GIG | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| GIH | Michigan | Blue-Cross Blue-Shield of Michigan |
| GII | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GIJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| GIK | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| GIL | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GIM | Michigan | Blue-Cross Blue-Shield of Michigan |
| GIN | - | Unallocated/Not Assigned |
| GIO | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| GIP | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| GIQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| GIR | - | Unallocated/Not Assigned |
| GIS | Alabama | Blue-Cross Blue-Shield of Alabama |
| GIT | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GIU | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| GIV | - | Unallocated/Not Assigned |
| GIW | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| GIX | - | Unallocated/Not Assigned |
| GIY | - | Unallocated/Not Assigned |
| GIZ | - | Unallocated/Not Assigned |
| GJA | - | Unallocated/Not Assigned |
| GJB | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| GJC | Arkansas | Arkansas Blue-Cross Blue-Shield |
| GJD | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| GJE | - | Unallocated/Not Assigned |
| GJF | - | Unallocated/Not Assigned |
| GJG | - | Unallocated/Not Assigned |
| GJH | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| GJI | California | Anthem Blue-Cross |
| GJJ | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GJK | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GJL | - | Unallocated/Not Assigned |
| GJM | New York | Empire Blue-Cross Blue-Shield of New York |
| GJN | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GJO | California | Anthem Blue-Cross |
| GJP | Illinois | Blue-Cross Blue-Shield of Illinois |
| GJQ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GJR | - | Unallocated/Not Assigned |
| GJS | New York | Empire Blue-Cross Blue-Shield of New York |
| GJT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GJU | - | Unallocated/Not Assigned |
| GJV | Florida | Florida-Blue |
| GJW | - | Unallocated/Not Assigned |
| GJX | New Hampshire | Anthem Blue-Cross Blue-Shield of New Hampshire |
| GJY | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GJZ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GKA | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GKB | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GKC | - | Unallocated/Not Assigned |
| GKD | Alabama | Blue-Cross Blue-Shield of Alabama |
| GKE | - | Unallocated/Not Assigned |
| GKF | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| GKG | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GKH | - | Unallocated/Not Assigned |
| GKI | Michigan | Blue-Cross Blue-Shield of Michigan |
| GKJ | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GKK | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GKL | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GKM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GKN | Alabama | Blue-Cross Blue-Shield of Alabama |
| GKO | Michigan | Blue-Cross Blue-Shield of Michigan |
| GKP | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| GKQ | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GKR | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GKS | - | Unallocated/Not Assigned |
| GKT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GKU | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GKV | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| GKW | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GKX | Illinois | Blue-Cross Blue-Shield of Illinois |
| GKY | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GKZ | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| GLA | Florida | Florida-Blue |
| GLB | California | Anthem Blue-Cross |
| GLC | Michigan | Blue-Cross Blue-Shield of Michigan |
| GLD | - | Unallocated/Not Assigned |
| GLE | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GLF | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GLG | Michigan | Blue-Cross Blue-Shield of Michigan |
| GLH | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GLI | Idaho | Blue-Cross of Idaho |
| GLJ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GLK | Arizona | Blue-Cross Blue-Shield of Arizona |
| GLL | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GLM | - | Unallocated/Not Assigned |
| GLN | California | Anthem Blue-Cross |
| GLO | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GLP | - | Unallocated/Not Assigned |
| GLQ | California | Blue-Shield of California |
| GLR | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GLS | California | Anthem Blue-Cross |
| GLT | Michigan | Blue-Cross Blue-Shield of Michigan |
| GLU | - | Unallocated/Not Assigned |
| GLV | California | Blue-Shield of California |
| GLW | Illinois | Blue-Cross Blue-Shield of Illinois |
| GLX | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GLY | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GLZ | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GMA | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| GMB | Illinois | Blue-Cross Blue-Shield of Illinois |
| GMC | Michigan | Blue-Cross Blue-Shield of Michigan |
| GMD | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GME | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GMF | Idaho | Blue-Cross of Idaho |
| GMG | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GMH | Michigan | Blue-Cross Blue-Shield of Michigan |
| GMI | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GMJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| GMK | Illinois | Blue-Cross Blue-Shield of Illinois |
| GML | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GMM | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| GMN | Florida | Florida-Blue |
| GMO | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GMP | Florida | Florida-Blue |
| GMQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| GMR | - | Unallocated/Not Assigned |
| GMS | Illinois | Blue-Cross Blue-Shield of Illinois |
| GMT | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| GMU | Michigan | Blue-Cross Blue-Shield of Michigan |
| GMV | Michigan | Blue-Cross Blue-Shield of Michigan |
| GMW | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| GMX | Idaho | Blue-Cross of Idaho |
| GMY | Idaho | Blue-Cross of Idaho |
| GMZ | Texas | Blue-Cross Blue-Shield of Texas |
| GNA | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GNB | - | Unallocated/Not Assigned |
| GNC | Michigan | Blue-Cross Blue-Shield of Michigan |
| GND | - | Unallocated/Not Assigned |
| GNE | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| GNF | Oklahoma | Blue-Cross Blue-Shield of Oklahoma |
| GNG | - | Unallocated/Not Assigned |
| GNH | - | Unallocated/Not Assigned |
| GNI | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| GNJ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GNK | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GNL | - | Unallocated/Not Assigned |
| GNM | - | Unallocated/Not Assigned |
| GNN | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GNO | Michigan | Blue-Cross Blue-Shield of Michigan |
| GNP | - | Unallocated/Not Assigned |
| GNQ | New York | Empire Blue-Cross Blue-Shield of New York |
| GNR | Illinois | Blue-Cross Blue-Shield of Illinois |
| GNS | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| GNT | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GNU | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GNV | Illinois | Blue-Cross Blue-Shield of Illinois |
| GNW | Florida | Florida-Blue |
| GNX | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GNY | Michigan | Blue-Cross Blue-Shield of Michigan |
| GNZ | - | Unallocated/Not Assigned |
| GOA | Michigan | Blue-Cross Blue-Shield of Michigan |
| GOB | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GOC | - | Unallocated/Not Assigned |
| GOD | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| GOE | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| GOF | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GOG | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GOH | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GOI | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GOJ | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| GOK | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GOL | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GOM | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GON | - | Unallocated/Not Assigned |
| GOO | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| GOP | Florida | Florida-Blue |
| GOQ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GOR | California | Anthem Blue-Cross |
| GOS | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GOT | - | Unallocated/Not Assigned |
| GOU | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| GOV | - | Unallocated/Not Assigned |
| GOW | - | Unallocated/Not Assigned |
| GOX | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GOY | - | Unallocated/Not Assigned |
| GOZ | - | Unallocated/Not Assigned |
| GPA | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| GPB | Michigan | Blue-Cross Blue-Shield of Michigan |
| GPC | Florida | Florida-Blue |
| GPD | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GPE | California | Blue-Shield of California |
| GPF | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| GPG | California | Blue-Shield of California |
| GPH | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GPI | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GPJ | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| GPK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GPL | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GPM | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GPN | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| GPO | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GPP | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GPQ | - | Unallocated/Not Assigned |
| GPR | New York | Empire Blue-Cross Blue-Shield of New York |
| GPS | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| GPT | Alabama | Blue-Cross Blue-Shield of Alabama |
| GPU | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GPV | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GPW | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| GPX | - | Unallocated/Not Assigned |
| GPY | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GPZ | Florida | Florida-Blue |
| GQA | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| GQB | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| GQC | California | Anthem Blue-Cross |
| GQD | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GQE | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| GQF | California | Anthem Blue-Cross |
| GQG | - | Unallocated/Not Assigned |
| GQH | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GQI | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| GQJ | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| GQK | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GQL | - | Unallocated/Not Assigned |
| GQM | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GQN | - | Unallocated/Not Assigned |
| GQO | - | Unallocated/Not Assigned |
| GQP | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| GQQ | - | Unallocated/Not Assigned |
| GQR | - | Unallocated/Not Assigned |
| GQS | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| GQT | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| GQU | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GQV | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GQW | - | Unallocated/Not Assigned |
| GQX | New York (Northeastern) | Blue-Shield of Northeastern New York |
| GQY | - | Unallocated/Not Assigned |
| GQZ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GRA | California | Anthem Blue-Cross |
| GRB | California | Anthem Blue-Cross |
| GRC | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GRD | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GRE | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GRF | Illinois | Blue-Cross Blue-Shield of Illinois |
| GRG | - | Unallocated/Not Assigned |
| GRH | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GRI | California | Blue-Shield of California |
| GRJ | Alabama | Blue-Cross Blue-Shield of Alabama |
| GRK | Alabama | Blue-Cross Blue-Shield of Alabama |
| GRL | - | Unallocated/Not Assigned |
| GRM | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GRN | - | Unallocated/Not Assigned |
| GRO | - | Unallocated/Not Assigned |
| GRP | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GRQ | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| GRR | - | Unallocated/Not Assigned |
| GRS | - | Unallocated/Not Assigned |
| GRT | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GRU | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GRV | Michigan | Blue-Cross Blue-Shield of Michigan |
| GRW | Illinois | Blue-Cross Blue-Shield of Illinois |
| GRX | - | Unallocated/Not Assigned |
| GRY | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GRZ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GSA | Texas | Blue-Cross Blue-Shield of Texas |
| GSB | - | Unallocated/Not Assigned |
| GSC | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GSD | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| GSE | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| GSF | California | Blue-Shield of California |
| GSG | - | Unallocated/Not Assigned |
| GSH | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| GSI | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GSJ | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| GSK | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| GSL | Idaho | Blue-Cross of Idaho |
| GSM | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| GSN | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GSO | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GSP | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GSQ | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GSR | Texas | Blue-Cross Blue-Shield of Texas |
| GSS | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| GST | Texas | Blue-Cross Blue-Shield of Texas |
| GSU | California | Blue-Shield of California |
| GSV | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GSW | Alabama | Blue-Cross Blue-Shield of Alabama |
| GSX | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| GSY | Texas | Blue-Cross Blue-Shield of Texas |
| GSZ | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| GTA | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GTB | California | Anthem Blue-Cross |
| GTC | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GTD | Idaho | Blue-Cross of Idaho |
| GTE | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GTF | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GTG | - | Unallocated/Not Assigned |
| GTH | Illinois | Blue-Cross Blue-Shield of Illinois |
| GTI | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GTJ | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| GTK | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| GTL | - | Unallocated/Not Assigned |
| GTM | - | Unallocated/Not Assigned |
| GTN | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| GTO | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GTP | Michigan | Blue-Cross Blue-Shield of Michigan |
| GTQ | - | Unallocated/Not Assigned |
| GTR | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GTS | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GTT | - | Unallocated/Not Assigned |
| GTU | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| GTV | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GTW | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GTX | - | Unallocated/Not Assigned |
| GTY | - | Unallocated/Not Assigned |
| GTZ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GUA | Michigan | Blue-Cross Blue-Shield of Michigan |
| GUB | - | Unallocated/Not Assigned |
| GUC | Michigan | Blue-Cross Blue-Shield of Michigan |
| GUD | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GUE | - | Unallocated/Not Assigned |
| GUF | Illinois | Blue-Cross Blue-Shield of Illinois |
| GUG | Florida | Florida-Blue |
| GUH | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GUI | California | Anthem Blue-Cross |
| GUJ | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| GUK | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GUL | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| GUM | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| GUN | - | Unallocated/Not Assigned |
| GUO | - | Unallocated/Not Assigned |
| GUP | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| GUQ | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| GUR | Michigan | Blue-Cross Blue-Shield of Michigan |
| GUS | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| GUT | - | Unallocated/Not Assigned |
| GUU | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| GUV | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| GUW | Illinois | Blue-Cross Blue-Shield of Illinois |
| GUX | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| GUY | Illinois | Blue-Cross Blue-Shield of Illinois |
| GUZ | Michigan | Blue-Cross Blue-Shield of Michigan |
| GVA | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GVB | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| GVC | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| GVD | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GVE | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GVF | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GVG | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GVH | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GVI | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GVJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| GVK | - | Unallocated/Not Assigned |
| GVL | Michigan | Blue-Cross Blue-Shield of Michigan |
| GVM | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GVN | California | Anthem Blue-Cross |
| GVO | - | Unallocated/Not Assigned |
| GVP | - | Unallocated/Not Assigned |
| GVQ | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| GVR | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GVS | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GVT | - | Unallocated/Not Assigned |
| GVU | - | Unallocated/Not Assigned |
| GVV | - | Unallocated/Not Assigned |
| GVW | Alabama | Blue-Cross Blue-Shield of Alabama |
| GVX | Illinois | Blue-Cross Blue-Shield of Illinois |
| GVY | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| GVZ | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GWA | California | Blue-Shield of California |
| GWB | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| GWC | Florida | Florida-Blue |
| GWD | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| GWE | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| GWF | - | Unallocated/Not Assigned |
| GWG | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GWH | California | Blue-Shield of California |
| GWI | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| GWJ | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| GWK | Illinois | Blue-Cross Blue-Shield of Illinois |
| GWL | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GWM | Alabama | Blue-Cross Blue-Shield of Alabama |
| GWN | - | Unallocated/Not Assigned |
| GWO | Idaho | Blue-Cross of Idaho |
| GWP | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GWQ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GWR | Florida | Florida-Blue |
| GWS | California | Blue-Shield of California |
| GWT | - | Unallocated/Not Assigned |
| GWU | Idaho | Blue-Cross of Idaho |
| GWV | - | Unallocated/Not Assigned |
| GWW | - | Unallocated/Not Assigned |
| GWX | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GWY | Illinois | Blue-Cross Blue-Shield of Illinois |
| GWZ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GXA | Nevada | Anthem Blue-Cross Blue-Shield of Nevada |
| GXB | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GXC | Illinois | Blue-Cross Blue-Shield of Illinois |
| GXD | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GXE | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GXF | - | Unallocated/Not Assigned |
| GXG | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GXH | Arkansas | Arkansas Blue-Cross Blue-Shield |
| GXI | - | Unallocated/Not Assigned |
| GXJ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GXK | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GXL | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GXM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GXN | Michigan | Blue-Cross Blue-Shield of Michigan |
| GXO | - | Unallocated/Not Assigned |
| GXP | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| GXQ | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| GXR | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GXS | - | Unallocated/Not Assigned |
| GXT | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GXU | Michigan | Blue-Cross Blue-Shield of Michigan |
| GXV | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| GXW | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| GXX | Michigan | Blue-Cross Blue-Shield of Michigan |
| GXY | California | Blue-Shield of California |
| GXZ | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GYA | - | Unallocated/Not Assigned |
| GYB | - | Unallocated/Not Assigned |
| GYC | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GYD | - | Unallocated/Not Assigned |
| GYE | - | Unallocated/Not Assigned |
| GYF | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GYG | - | Unallocated/Not Assigned |
| GYH | Illinois | Blue-Cross Blue-Shield of Illinois |
| GYI | - | Unallocated/Not Assigned |
| GYJ | - | Unallocated/Not Assigned |
| GYK | Oklahoma | Blue-Cross Blue-Shield of Oklahoma |
| GYL | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| GYM | California | Blue-Shield of California |
| GYN | - | Unallocated/Not Assigned |
| GYO | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GYP | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GYQ | California | Anthem Blue-Cross |
| GYR | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| GYS | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GYT | Michigan | Blue-Cross Blue-Shield of Michigan |
| GYU | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| GYV | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| GYW | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| GYX | - | Unallocated/Not Assigned |
| GYY | Michigan | Blue-Cross Blue-Shield of Michigan |
| GYZ | Nevada | Anthem Blue-Cross Blue-Shield of Nevada |
| GZA | - | Unallocated/Not Assigned |
| GZB | California | Anthem Blue-Cross |
| GZC | - | Unallocated/Not Assigned |
| GZD | Michigan | Blue-Cross Blue-Shield of Michigan |
| GZE | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| GZF | Alabama | Blue-Cross Blue-Shield of Alabama |
| GZG | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| GZH | - | Unallocated/Not Assigned |
| GZI | Florida | Florida-Blue |
| GZJ | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GZK | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| GZL | Nevada | Anthem Blue-Cross Blue-Shield of Nevada |
| GZM | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| GZN | - | Unallocated/Not Assigned |
| GZO | Michigan | Blue-Cross Blue-Shield of Michigan |
| GZP | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| GZQ | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| GZR | Illinois | Blue-Cross Blue-Shield of Illinois |
| GZS | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| GZT | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GZU | - | Unallocated/Not Assigned |
| GZV | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| GZW | - | Unallocated/Not Assigned |
| GZX | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| GZY | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| GZZ | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |