| GAA | Highmark Blue Cross Blue Shield of Pennsylvania |
| GAB | BCBS of Massachusetts |
| GAC | BCBS of Illinois |
| GAD | Blue Shield of California |
| GAE | Anthem Blue Cross of California |
| GAF | BCBS of Illinois |
| GAG | BCBS of Texas |
| GAH | Excellus Blue Cross Blue Shield |
| GAI | BCBS of Michigan |
| GAJ | Wellmark Blue Cross Blue Shield |
| GAK | BCBS of Massachusetts |
| GAL | BCBS of South Carolina |
| GAM | BCBS of Texas |
| GAN | Anthem Blue Cross Blue Shield of Georgia |
| GAO | BCBS of Massachusetts |
| GAP | BCBS of Georgia |
| GAQ | Anthem Blue Cross Blue Shield of Georgia |
| GAR | Anthem Blue Cross Blue Shield of Virginia |
| GAS | BCBS of Arkansas |
| GAT | Blue Cross Blue Shield of Alabama |
| GAU | CareFirst Blue Cross Blue Shield |
| GAV | BCBS of Georgia |
| GAW | BCBS of Massachusetts |
| GAX | BCBS of Illinois |
| GAY | Anthem Blue Cross Blue Shield of Ohio |
| GAZ | Anthem Blue Cross Blue Shield of Virginia |
| GBA | BCBS of Montana |
| GBB | Anthem Blue Cross of California |
| GBC | Wellmark Blue Cross Blue Shield |
| GBD | BCBS of Rhode Island |
| GBE | BCBS of Michigan |
| GBF | BCBS of Illinois |
| GBG | BCBS of Michigan |
| GBH | BCBS of Illinois |
| GBI | Blue Shield of California |
| GBJ | Highmark Blue Cross Blue Shield of Pennsylvania |
| GBK | Blue Shield of California |
| GBL | BCBS of Massachusetts |
| GBM | Anthem Blue Cross of California |
| GBN | Highmark Blue Cross Blue Shield of Pennsylvania |
| GBO | BCBS of Kansas City |
| GBP | BCBS of South Carolina |
| GBQ | Anthem Blue Cross Blue Shield of Missouri |
| GBR | Anthem Blue Cross Blue Shield of Missouri |
| GBS | BCBS of Minnesota |
| GBT | Anthem Blue Cross Blue Shield of Ohio |
| GBU | Anthem Blue Cross of California |
| GBV | Wellmark Blue Cross Blue Shield |
| GBW | BCBS of Illinois |
| GBX | BCBS of Illinois |
| GBY | CareFirst Blue Cross Blue Shield |
| GBZ | BCBS of South Carolina |
| GCA | Blue Cross Blue Shield of Alabama |
| GCB | BCBS of Texas |
| GCC | CareFirst Blue Cross Blue Shield |
| GCD | Anthem Blue Cross of California |
| GCE | CareFirst Blue Cross Blue Shield |
| GCF | Anthem Blue Cross of California |
| GCG | Blue Shield of California |
| GCH | Capital BlueCross |
| GCI | Blue Shield of California |
| GCJ | Empire BCBS |
| GCK | BCBS of Michigan |
| GCL | BCBS of South Carolina |
| GCM | Highmark Blue Cross Blue Shield of Pennsylvania |
| GCN | Anthem Blue Cross Blue Shield of Virginia |
| GCO | Capital BlueCross |
| GCP | BCBS of Illinois |
| GCQ | Anthem Blue Cross Blue Shield of Ohio |
| GCR | Wellmark Blue Cross Blue Shield |
| GCS | BCBS of Minnesota |
| GCT | Anthem Blue Cross of California |
| GCU | Anthem Blue Cross Blue Shield of Ohio |
| GCV | Blue Cross Blue Shield of Western New York |
| GCW | Wellmark Blue Cross Blue Shield |
| GCX | Blue Cross Blue Shield of Alabama |
| GCY | Unassigned |
| GCZ | BCBS of Illinois |
| GDA | Blue Cross Blue Shield of Western New York |
| GDB | Anthem Blue Cross of California |
| GDC | Anthem Blue Cross Blue Shield of Virginia |
| GDD | Anthem Blue Cross of California |
| GDE | Anthem Blue Cross Blue Shield of Ohio |
| GDF | Premera Blue Cross |
| GDG | CareFirst Blue Cross Blue Shield |
| GDH | BCBS of Georgia |
| GDI | Blue Cross Blue Shield of Western New York |
| GDJ | Independence Blue Cross |
| GDK | BCBS of North Carolina |
| GDL | BCBS of Michigan |
| GDM | Highmark Blue Cross Blue Shield of Pennsylvania |
| GDN | BCBS of Michigan |
| GDO | Wellmark Blue Cross Blue Shield |
| GDP | CareFirst Blue Cross Blue Shield |
| GDQ | Anthem Blue Cross Blue Shield of Ohio |
| GDR | BCBS of Minnesota |
| GDS | Empire BCBS |
| GDT | Wellmark Blue Cross Blue Shield |
| GDU | BCBS of Illinois |
| GDV | Anthem Blue Cross Blue Shield of Ohio |
| GDW | Wellmark Blue Cross Blue Shield |
| GDX | BCBS of Texas |
| GDY | Blue Cross Blue Shield of Western New York |
| GDZ | CareFirst Blue Cross Blue Shield |
| GEA | Independence Blue Cross |
| GEB | Highmark Blue Cross Blue Shield of Pennsylvania |
| GEC | Blue Cross Blue Shield of Alabama |
| GED | Independence Blue Cross |
| GEE | Blue Shield of California |
| GEF | Anthem Blue Cross of California |
| GEG | Anthem Blue Cross Blue Shield of Ohio |
| GEH | Anthem Blue Cross of California |
| GEI | Anthem Blue Cross Blue Shield of Kentucky |
| GEJ | BCBS of Arkansas |
| GEK | Empire BCBS |
| GEL | Unassigned |
| GEM | CareFirst Blue Cross Blue Shield |
| GEN | Blue Cross Blue Shield of Alabama |
| GEO | Anthem Blue Cross of California |
| GEP | Blue Cross Blue Shield of Alabama |
| GEQ | BCBS of Georgia |
| GER | Unassigned |
| GES | Anthem Blue Cross of California |
| GET | Wellmark Blue Cross Blue Shield |
| GEU | BCBS of Illinois |
| GEV | Anthem Blue Cross Blue Shield of Virginia |
| GEW | Unassigned |
| GEX | Blue Cross Blue Shield of Alabama |
| GEY | Unassigned |
| GEZ | BCBS of Minnesota |
| GFA | Anthem Blue Cross Blue Shield of Georgia |
| GFB | Anthem Blue Cross of California |
| GFC | BCBS of South Carolina |
| GFD | Capital BlueCross |
| GFE | Anthem Blue Cross Blue Shield of Ohio |
| GFF | Anthem Blue Cross of California |
| GFG | Wellmark Blue Cross Blue Shield |
| GFH | Anthem Blue Cross Blue Shield of Nevada |
| GFI | CareFirst Blue Cross Blue Shield |
| GFJ | BCBS of North Carolina |
| GFK | Regence BCBS of Utah |
| GFL | BCBS of Illinois |
| GFM | BCBS of Georgia |
| GFN | Anthem Blue Cross of California |
| GFO | Unassigned |
| GFP | BCBS of Michigan |
| GFQ | Anthem Blue Cross of California |
| GFR | Anthem Blue Cross Blue Shield of Ohio |
| GFS | Empire BCBS |
| GFT | Wellmark Blue Cross Blue Shield |
| GFU | Premera Blue Cross |
| GFV | CareFirst Blue Cross Blue Shield |
| GFW | BCBS of Massachusetts |
| GFX | BCBS of Texas |
| GFY | Unassigned |
| GFZ | Empire BCBS |
| GGA | Highmark Blue Cross Blue Shield of Pennsylvania |
| GGB | Blue Shield of California |
| GGC | BCBS of Georgia |
| GGD | Blue Shield of California |
| GGE | Premera Blue Cross |
| GGF | Anthem Blue Cross Blue Shield of Georgia |
| GGG | BCBS of Georgia |
| GGH | Wellmark Blue Cross Blue Shield |
| GGI | BCBS of Arizona |
| GGJ | BCBS of Illinois |
| GGK | Wellmark Blue Cross Blue Shield |
| GGL | Anthem Blue Cross Blue Shield of Ohio |
| GGM | Highmark Blue Cross Blue Shield of Pennsylvania |
| GGN | Empire BCBS |
| GGO | BCBS of Michigan |
| GGP | BCBS of Minnesota |
| GGQ | Anthem Blue Cross of California |
| GGR | Capital BlueCross |
| GGS | Anthem Blue Cross of California |
| GGT | Highmark Blue Cross Blue Shield of Pennsylvania |
| GGU | Florida Blue |
| GGV | BCBS of Arkansas |
| GGW | BCBS of Georgia |
| GGX | Wellmark Blue Cross Blue Shield |
| GGY | Blue Shield of California |
| GGZ | BCBS of Illinois |
| GHA | Anthem Blue Cross Blue Shield of Wisconsin |
| GHB | BCBS of Michigan |
| GHC | Anthem Blue Cross Blue Shield of Ohio |
| GHD | Premera Blue Cross |
| GHE | Regence Blue Shield of Washington |
| GHF | Anthem Blue Cross Blue Shield of Ohio |
| GHG | BCBS of Texas |
| GHH | Unassigned |
| GHI | Anthem Blue Cross Blue Shield of Kentucky |
| GHJ | BCBS of Minnesota |
| GHK | BCBS of South Carolina |
| GHL | Blue Cross Blue Shield of Tennessee |
| GHM | BCBS of Texas |
| GHN | BCBS of Illinois |
| GHO | Independence Blue Cross |
| GHP | BCBS of Michigan |
| GHQ | Blue Cross Blue Shield of Western New York |
| GHR | BCBS of Massachusetts |
| GHS | Excellus Blue Cross Blue Shield |
| GHT | Unassigned |
| GHU | BCBS of Arizona |
| GHV | BCBS of Texas |
| GHW | Anthem Blue Cross Blue Shield of Georgia |
| GHX | BCBS of Illinois |
| GHY | Wellmark Blue Cross Blue Shield |
| GHZ | CareFirst Blue Cross Blue Shield |
| GIA | BCBS of Massachusetts |
| GIB | Blue Cross Blue Shield of Tennessee |
| GIC | Anthem Blue Cross of California |
| GID | Blue Cross Blue Shield of Alabama |
| GIE | Anthem Blue Cross of California |
| GIF | Blue Cross Blue Shield of Western New York |
| GIG | BCBS of Louisiana |
| GIH | BCBS of Michigan |
| GII | Independence Blue Cross |
| GIJ | BCBS of Michigan |
| GIK | Blue Cross Blue Shield of Western New York |
| GIL | Anthem Blue Cross Blue Shield of Ohio |
| GIM | BCBS of Michigan |
| GIN | Unassigned |
| GIO | Blue Cross Blue Shield of Tennessee |
| GIP | BCBS of South Carolina |
| GIQ | BCBS of Michigan |
| GIR | Highmark Blue Cross Blue Shield of Pennsylvania |
| GIS | Blue Cross Blue Shield of Alabama |
| GIT | BCBS of Georgia |
| GIU | BCBS of Nebraska |
| GIV | BCBS of Massachusetts |
| GIW | Blue Cross Blue Shield of Western New York |
| GIX | Wellmark Blue Cross Blue Shield |
| GIY | Anthem Blue Cross of California |
| GIZ | Anthem Blue Cross of California |
| GJA | Blue Shield of California |
| GJB | Anthem Blue Cross Blue Shield of Ohio |
| GJC | BCBS of Arkansas |
| GJD | Anthem Blue Cross Blue Shield of Virginia |
| GJE | BCBS of South Carolina |
| GJF | Independence Blue Cross |
| GJG | Blue Cross Blue Shield of Alabama |
| GJH | BCBS of Nebraska |
| GJI | Anthem Blue Cross of California |
| GJJ | Independence Blue Cross |
| GJK | CareFirst Blue Cross Blue Shield |
| GJL | Highmark Blue Cross Blue Shield of Pennsylvania |
| GJM | Empire BCBS |
| GJN | Anthem Blue Cross Blue Shield of Georgia |
| GJO | Anthem Blue Cross of California |
| GJP | BCBS of Illinois |
| GJQ | Anthem Blue Cross Blue Shield of Ohio |
| GJR | Blue Shield of California |
| GJS | Empire BCBS |
| GJT | CareFirst Blue Cross Blue Shield |
| GJU | BCBS of Massachusetts |
| GJV | BCBS of South Carolina |
| GJW | Horizon BCBS of New Jersey |
| GJX | Anthem Blue Cross Blue Shield of New Hampshire |
| GJY | CareFirst Blue Cross Blue Shield |
| GJZ | CareFirst Blue Cross Blue Shield |
| GKA | Anthem Blue Cross of California |
| GKB | CareFirst Blue Cross Blue Shield |
| GKC | BCBS of Georgia |
| GKD | Blue Cross Blue Shield of Alabama |
| GKE | CareFirst Blue Cross Blue Shield |
| GKF | BCBS of Kansas City |
| GKG | BCBS of Minnesota |
| GKH | BCBS of Georgia |
| GKI | BCBS of Michigan |
| GKJ | Independence Blue Cross |
| GKK | Independence Blue Cross |
| GKL | Wellmark Blue Cross Blue Shield |
| GKM | Highmark Blue Cross Blue Shield of Pennsylvania |
| GKN | Blue Cross Blue Shield of Alabama |
| GKO | BCBS of Michigan |
| GKP | Anthem Blue Cross Blue Shield of Connecticut |
| GKQ | BCBS of Minnesota |
| GKR | BCBS of Minnesota |
| GKS | BCBS of Minnesota |
| GKT | CareFirst Blue Cross Blue Shield |
| GKU | BCBS of Georgia |
| GKV | Anthem Blue Cross Blue Shield of Indiana |
| GKW | Wellmark Blue Cross Blue Shield |
| GKX | BCBS of Illinois |
| GKY | Anthem Blue Cross Blue Shield of Ohio |
| GKZ | Regence BCBS of Utah |
| GLA | BCBS of South Carolina |
| GLB | Anthem Blue Cross of California |
| GLC | BCBS of Michigan |
| GLD | Blue Cross Blue Shield of Alabama |
| GLE | BCBS of Georgia |
| GLF | CareFirst Blue Cross Blue Shield |
| GLG | BCBS of Michigan |
| GLH | Anthem Blue Cross of California |
| GLI | Blue Cross of Idaho |
| GLJ | BCBS of Georgia |
| GLK | BCBS of Arizona |
| GLL | BCBS of Georgia |
| GLM | Anthem Blue Cross of California |
| GLN | Anthem Blue Cross of California |
| GLO | Independence Blue Cross |
| GLP | Blue Shield of California |
| GLQ | Blue Shield of California |
| GLR | BCBS of Minnesota |
| GLS | Anthem Blue Cross of California |
| GLT | BCBS of Michigan |
| GLU | Independence Blue Cross |
| GLV | Blue Shield of California |
| GLW | BCBS of Illinois |
| GLX | Anthem Blue Cross Blue Shield of Ohio |
| GLY | BCBS of Georgia |
| GLZ | BCBS of Massachusetts |
| GMA | Anthem Blue Cross Blue Shield of Virginia |
| GMB | BCBS of Illinois |
| GMC | BCBS of Michigan |
| GMD | Anthem Blue Cross Blue Shield of Ohio |
| GME | BCBS of Massachusetts |
| GMF | Blue Cross of Idaho |
| GMG | Anthem Blue Cross of California |
| GMH | BCBS of Michigan |
| GMI | BCBS of Minnesota |
| GMJ | BCBS of Michigan |
| GMK | BCBS of Illinois |
| GML | Anthem Blue Cross Blue Shield of Ohio |
| GMM | Anthem Blue Cross Blue Shield of Kentucky |
| GMN | BCBS of South Carolina |
| GMO | Anthem Blue Cross of California |
| GMP | BCBS of South Carolina |
| GMQ | BCBS of Michigan |
| GMR | Anthem Blue Cross of California |
| GMS | BCBS of Illinois |
| GMT | Unassigned |
| GMU | BCBS of Michigan |
| GMV | BCBS of Michigan |
| GMW | Anthem Blue Cross Blue Shield of Ohio |
| GMX | Blue Cross of Idaho |
| GMY | Blue Cross of Idaho |
| GMZ | BCBS of Texas |
| GNA | Wellmark Blue Cross Blue Shield |
| GNB | Anthem Blue Cross of California |
| GNC | BCBS of Michigan |
| GND | Anthem Blue Cross Blue Shield of Virginia |
| GNE | BCBS of North Carolina |
| GNF | BCBS of Oklahoma |
| GNG | CareFirst Blue Cross Blue Shield |
| GNH | Anthem Blue Cross of California |
| GNI | Regence BCBS of Oregon |
| GNJ | CareFirst Blue Cross Blue Shield |
| GNK | BCBS of Massachusetts |
| GNL | CareFirst Blue Cross Blue Shield |
| GNM | BCBS of Georgia |
| GNN | Anthem Blue Cross of California |
| GNO | BCBS of Michigan |
| GNP | BCBS of South Carolina |
| GNQ | Empire BCBS |
| GNR | BCBS of Illinois |
| GNS | BCBS of South Carolina |
| GNT | BCBS of Georgia |
| GNU | Wellmark Blue Cross Blue Shield |
| GNV | BCBS of Illinois |
| GNW | Florida Blue |
| GNX | BCBS of Minnesota |
| GNY | BCBS of Michigan |
| GNZ | Blue Cross of Idaho |
| GOA | BCBS of Michigan |
| GOB | BCBS of Massachusetts |
| GOC | BCBS of Massachusetts |
| GOD | BCBS of North Carolina |
| GOE | Regence BCBS of Oregon |
| GOF | Independence Blue Cross |
| GOG | CareFirst Blue Cross Blue Shield |
| GOH | BCBS of Georgia |
| GOI | Wellmark Blue Cross Blue Shield |
| GOJ | Capital BlueCross |
| GOK | CareFirst Blue Cross Blue Shield |
| GOL | Independence Blue Cross |
| GOM | CareFirst Blue Cross Blue Shield |
| GON | Independence Blue Cross |
| GOO | BCBS of South Carolina |
| GOP | BCBS of South Carolina |
| GOQ | CareFirst Blue Cross Blue Shield |
| GOR | Anthem Blue Cross of California |
| GOS | Wellmark Blue Cross Blue Shield |
| GOT | Regence BCBS of Oregon |
| GOU | Premera Blue Cross |
| GOV | BCBS of South Carolina |
| GOW | Independence Blue Cross |
| GOX | Wellmark Blue Cross Blue Shield |
| GOY | BCBS of Massachusetts |
| GOZ | Unassigned |
| GPA | BCBS of North Carolina |
| GPB | BCBS of Michigan |
| GPC | Florida Blue |
| GPD | Wellmark Blue Cross Blue Shield |
| GPE | Blue Shield of California |
| GPF | BCBS of Nebraska |
| GPG | Blue Shield of California |
| GPH | Wellmark Blue Cross Blue Shield |
| GPI | Independence Blue Cross |
| GPJ | Anthem Blue Cross Blue Shield of Wisconsin |
| GPK | Wellmark Blue Cross Blue Shield |
| GPL | BCBS of Massachusetts |
| GPM | Anthem Blue Cross Blue Shield of Ohio |
| GPN | Anthem Blue Cross Blue Shield of Ohio |
| GPO | CareFirst Blue Cross Blue Shield |
| GPP | Wellmark Blue Cross Blue Shield |
| GPQ | Anthem Blue Cross of California |
| GPR | Empire BCBS |
| GPS | BCBS of Kansas City |
| GPT | Blue Cross Blue Shield of Alabama |
| GPU | Independence Blue Cross |
| GPV | CareFirst Blue Cross Blue Shield |
| GPW | Anthem Blue Cross Blue Shield of Ohio |
| GPX | BCBS of Illinois |
| GPY | CareFirst Blue Cross Blue Shield |
| GPZ | BCBS of South Carolina |
| GQA | Regence BCBS of Oregon |
| GQB | BCBS of South Carolina |
| GQC | Anthem Blue Cross of California |
| GQD | BCBS of Georgia |
| GQE | Anthem Blue Cross Blue Shield of Virginia |
| GQF | Anthem Blue Cross of California |
| GQG | BCBS of South Carolina |
| GQH | Anthem Blue Cross Blue Shield of Ohio |
| GQI | BCBS of South Carolina |
| GQJ | Premera Blue Cross |
| GQK | BCBS of Massachusetts |
| GQL | Premera Blue Cross |
| GQM | CareFirst Blue Cross Blue Shield |
| GQN | Premera Blue Cross |
| GQO | Unassigned |
| GQP | Anthem Blue Cross Blue Shield of Wisconsin |
| GQQ | Unassigned |
| GQR | BCBS of South Carolina |
| GQS | Regence BCBS of Oregon |
| GQT | BCBS of South Carolina |
| GQU | Anthem Blue Cross of California |
| GQV | Anthem Blue Cross of California |
| GQW | Highmark Blue Cross Blue Shield of Pennsylvania |
| GQX | Blue Shield of Northeastern New York |
| GQY | CareFirst Blue Cross Blue Shield |
| GQZ | Anthem Blue Cross Blue Shield of Ohio |
| GRA | Anthem Blue Cross of California |
| GRB | Anthem Blue Cross of California |
| GRC | BCBS of Minnesota |
| GRD | Anthem Blue Cross Blue Shield of Ohio |
| GRE | Wellmark Blue Cross Blue Shield |
| GRF | BCBS of Illinois |
| GRG | CareFirst Blue Cross Blue Shield |
| GRH | BCBS of Massachusetts |
| GRI | Blue Cross Blue Shield of Tennessee |
| GRJ | Blue Cross Blue Shield of Alabama |
| GRK | Blue Cross Blue Shield of Alabama |
| GRL | Unassigned |
| GRM | Wellmark Blue Cross Blue Shield |
| GRN | BCBS of Illinois |
| GRO | BCBS of Nebraska |
| GRP | BCBS of Minnesota |
| GRQ | Blue Cross Blue Shield of Tennessee |
| GRR | Highmark Blue Cross Blue Shield of Pennsylvania |
| GRS | BCBS of Massachusetts |
| GRT | Anthem Blue Cross Blue Shield of Ohio |
| GRU | Anthem Blue Cross Blue Shield of Ohio |
| GRV | BCBS of Michigan |
| GRW | BCBS of Illinois |
| GRX | Wellmark Blue Cross Blue Shield |
| GRY | Anthem Blue Cross Blue Shield of Ohio |
| GRZ | Wellmark Blue Cross Blue Shield |
| GSA | BCBS of Texas |
| GSB | Blue Cross Blue Shield of Western New York |
| GSC | Highmark Blue Cross Blue Shield of Pennsylvania |
| GSD | BCBS of South Carolina |
| GSE | Blue Cross Blue Shield of Western New York |
| GSF | Blue Cross Blue Shield of Alabama |
| GSG | Anthem Blue Cross of California |
| GSH | Anthem Blue Cross Blue Shield of Indiana |
| GSI | CareFirst Blue Cross Blue Shield |
| GSJ | Anthem Blue Cross Blue Shield of Indiana |
| GSK | BCBS of North Carolina |
| GSL | Blue Cross of Idaho |
| GSM | BCBS of South Carolina |
| GSN | Independence Blue Cross |
| GSO | CareFirst Blue Cross Blue Shield |
| GSP | Anthem Blue Cross of California |
| GSQ | Highmark Blue Cross Blue Shield of Pennsylvania |
| GSR | BCBS of Texas |
| GSS | BCBS of South Carolina |
| GST | BCBS of Texas |
| GSU | Blue Shield of California |
| GSV | Anthem Blue Cross Blue Shield of Ohio |
| GSW | Blue Cross Blue Shield of Alabama |
| GSX | Anthem Blue Cross Blue Shield of Missouri |
| GSY | BCBS of Texas |
| GSZ | Capital BlueCross |
| GTA | CareFirst Blue Cross Blue Shield |
| GTB | Anthem Blue Cross of California |
| GTC | BCBS of Massachusetts |
| GTD | Blue Cross of Idaho |
| GTE | BCBS of Massachusetts |
| GTF | Anthem Blue Cross Blue Shield of Ohio |
| GTG | Anthem Blue Cross of California |
| GTH | BCBS of Illinois |
| GTI | BCBS of Massachusetts |
| GTJ | Anthem Blue Cross Blue Shield of Virginia |
| GTK | BCBS of South Carolina |
| GTL | Blue Cross Blue Shield of Alabama |
| GTM | CareFirst Blue Cross Blue Shield |
| GTN | Premera Blue Cross |
| GTO | Independence Blue Cross |
| GTP | BCBS of Michigan |
| GTQ | Blue Shield of California |
| GTR | Wellmark Blue Cross Blue Shield |
| GTS | Anthem Blue Cross Blue Shield of Georgia |
| GTT | Regence Blue Shield of Washington |
| GTU | CareFirst Blue Cross Blue Shield |
| GTV | BCBS of Georgia |
| GTW | BCBS of Georgia |
| GTX | Anthem Blue Cross of California |
| GTY | BCBS of South Carolina |
| GTZ | CareFirst Blue Cross Blue Shield |
| GUA | BCBS of Michigan |
| GUB | Empire BCBS |
| GUC | BCBS of Michigan |
| GUD | Wellmark Blue Cross Blue Shield |
| GUE | BCBS of Massachusetts |
| GUF | BCBS of Illinois |
| GUG | Florida Blue |
| GUH | CareFirst Blue Cross Blue Shield |
| GUI | Anthem Blue Cross of California |
| GUJ | Premera Blue Cross |
| GUK | BCBS of Georgia |
| GUL | Horizon BCBS of New Jersey |
| GUM | BCBS of North Carolina |
| GUN | Unassigned |
| GUO | Premera Blue Cross |
| GUP | BCBS of Nebraska |
| GUQ | BCBS of South Carolina |
| GUR | BCBS of Michigan |
| GUS | Anthem Blue Cross Blue Shield of Wisconsin |
| GUT | Wellmark Blue Cross Blue Shield |
| GUU | Anthem Blue Cross Blue Shield of Ohio |
| GUV | Anthem Blue Cross Blue Shield of Ohio |
| GUW | BCBS of Illinois |
| GUX | Anthem Blue Cross Blue Shield of Ohio |
| GUY | BCBS of Illinois |
| GUZ | BCBS of Michigan |
| GVA | BCBS of Georgia |
| GVB | Anthem Blue Cross Blue Shield of Indiana |
| GVC | Anthem Blue Cross Blue Shield of Ohio |
| GVD | Anthem Blue Cross Blue Shield of Ohio |
| GVE | Highmark Blue Cross Blue Shield of Pennsylvania |
| GVF | Independence Blue Cross |
| GVG | BCBS of Georgia |
| GVH | BCBS of Georgia |
| GVI | Independence Blue Cross |
| GVJ | BCBS of Michigan |
| GVK | Regence Blue Shield of Washington |
| GVL | BCBS of Michigan |
| GVM | Wellmark Blue Cross Blue Shield |
| GVN | Anthem Blue Cross of California |
| GVO | BCBS of Georgia |
| GVP | BCBS of Oklahoma |
| GVQ | Premera Blue Cross |
| GVR | BCBS of Georgia |
| GVS | BCBS of Massachusetts |
| GVT | BCBS of South Carolina |
| GVU | BCBS of Georgia |
| GVV | BCBS of South Carolina |
| GVW | Blue Cross Blue Shield of Alabama |
| GVX | BCBS of Illinois |
| GVY | Premera Blue Cross |
| GVZ | BCBS of Massachusetts |
| GWA | Blue Shield of California |
| GWB | Horizon BCBS of New Jersey |
| GWC | BCBS of South Carolina |
| GWD | Blue Cross Blue Shield of Tennessee |
| GWE | Anthem Blue Cross Blue Shield of Virginia |
| GWF | Anthem Blue Cross of California |
| GWG | Highmark Blue Cross Blue Shield of Pennsylvania |
| GWH | Blue Shield of Northeastern New York |
| GWI | Anthem Blue Cross Blue Shield of Wisconsin |
| GWJ | Premera Blue Cross |
| GWK | BCBS of Illinois |
| GWL | Wellmark Blue Cross Blue Shield |
| GWM | Blue Cross Blue Shield of Alabama |
| GWN | BCBS of Rhode Island |
| GWO | Blue Cross of Idaho |
| GWP | Anthem Blue Cross Blue Shield of Wisconsin |
| GWQ | Anthem Blue Cross of California |
| GWR | BCBS of South Carolina |
| GWS | Blue Shield of California |
| GWT | Anthem Blue Cross Blue Shield of Virginia |
| GWU | Blue Cross of Idaho |
| GWV | Anthem Blue Cross of California |
| GWW | BCBS of Texas |
| GWX | BCBS of Minnesota |
| GWY | BCBS of Illinois |
| GWZ | Wellmark Blue Cross Blue Shield |
| GXA | Anthem Blue Cross Blue Shield of Nevada |
| GXB | BCBS of Massachusetts |
| GXC | BCBS of Illinois |
| GXD | Wellmark Blue Cross Blue Shield |
| GXE | Wellmark Blue Cross Blue Shield |
| GXF | BCBS of Illinois |
| GXG | Highmark Blue Cross Blue Shield of Pennsylvania |
| GXH | BCBS of Minnesota |
| GXI | BCBS of Georgia |
| GXJ | BCBS of Georgia |
| GXK | CareFirst Blue Cross Blue Shield |
| GXL | Wellmark Blue Cross Blue Shield |
| GXM | Highmark Blue Cross Blue Shield of Pennsylvania |
| GXN | BCBS of Michigan |
| GXO | CareFirst Blue Cross Blue Shield |
| GXP | BCBS of Nebraska |
| GXQ | Regence BCBS of Utah |
| GXR | BCBS of Massachusetts |
| GXS | Assigned |
| GXT | Anthem Blue Cross Blue Shield of Georgia |
| GXU | BCBS of Michigan |
| GXV | BCBS of South Carolina |
| GXW | Blue Cross Blue Shield of Western New York |
| GXX | BCBS of Michigan |
| GXY | Blue Shield of California |
| GXZ | BCBS of Minnesota |
| GYA | BCBS of Texas |
| GYB | BCBS of Texas |
| GYC | Anthem Blue Cross Blue Shield of Ohio |
| GYD | BCBS of Texas |
| GYE | BCBS of Texas |
| GYF | BCBS of Minnesota |
| GYG | BCBS of Texas |
| GYH | BCBS of Illinois |
| GYI | BCBS of Georgia |
| GYJ | Anthem Blue Cross of California |
| GYK | BCBS of Oklahoma |
| GYL | BCBS of Wisconsin |
| GYM | Blue Shield of California |
| GYN | BCBS of Georgia |
| GYO | Anthem Blue Cross of California |
| GYP | BCBS of Minnesota |
| GYQ | Anthem Blue Cross of California |
| GYR | Anthem Blue Cross Blue Shield of Ohio |
| GYS | BCBS of Massachusetts |
| GYT | BCBS of Michigan |
| GYU | Highmark Blue Cross Blue Shield of Pennsylvania |
| GYV | Anthem Blue Cross Blue Shield of Virginia |
| GYW | BCBS of Georgia |
| GYX | BCBS of Minnesota |
| GYY | BCBS of Michigan |
| GYZ | Anthem Blue Cross Blue Shield of Nevada |
| GZA | BCBS of New Mexico |
| GZB | Anthem Blue Cross of California |
| GZC | Anthem Blue Cross Blue Shield of Virginia |
| GZD | BCBS of Michigan |
| GZE | CareFirst Blue Cross Blue Shield |
| GZF | Blue Cross Blue Shield of Alabama |
| GZG | Blue Cross Blue Shield of Western New York |
| GZH | Anthem Blue Cross Blue Shield of Connecticut |
| GZI | BCBS of South Carolina |
| GZJ | BCBS of Massachusetts |
| GZK | Anthem Blue Cross Blue Shield of Missouri |
| GZL | Anthem Blue Cross Blue Shield of Nevada |
| GZM | Independence Blue Cross |
| GZN | Regence Blue Shield of Washington |
| GZO | BCBS of Michigan |
| GZP | BCBS of Massachusetts |
| GZQ | Blue Cross Blue Shield of Western New York |
| GZR | BCBS of Illinois |
| GZS | Regence BCBS of Oregon |
| GZT | BCBS of Minnesota |
| GZU | BCBS of Illinois |
| GZV | Wellmark Blue Cross Blue Shield |
| GZW | Blue Cross of California |
| GZX | BCBS of Minnesota |
| GZY | Anthem Blue Cross Blue Shield of Wisconsin |
| GZZ | Regence Blue Shield of Washington |
| G2A | Regence BCBS of Oregon |
| G2E | BCBS of Illinois |
| G2F | BCBS of Illinois |
| G2G | Anthem Blue Cross Blue Shield of Virginia |
| G2H | Highmark Blue Cross Blue Shield of Pennsylvania |
| G2K | BCBS of Illinois |
| G2L | Anthem Blue Cross of California |
| G2N | Independence Blue Cross |
| G2P | Regence BCBS of Oregon |
| G2R | BCBS of Illinois |
| G2T | Independence Blue Cross |
| G2V | Independence Blue Cross |
| G2W | BCBS of Montana |
| G2X | BCBS of Texas |
| G2Y | Anthem Blue Cross Blue Shield of Connecticut |
| G3A | Regence BCBS of Oregon |
| G3C | Regence BCBS of Oregon |
| G3F | Anthem Blue Cross Blue Shield of Virginia |
| G3K | BCBS of Minnesota |
| G3N | Anthem Blue Cross Blue Shield of Virginia |
| G3P | Anthem Blue Cross Blue Shield of Virginia |
| G3T | Blue Shield of Northeastern New York |
| G3V | Regence BCBS of Oregon |
| G3W | Anthem Blue Cross Blue Shield of Virginia |
| G3Y | Horizon BCBS of New Jersey |
| G3Z | Anthem Blue Cross Blue Shield of Virginia |
| G4C | BCBS of Illinois |
| G4F | Regence Blue Shield of Washington |
| G4H | BCBS of Texas |
| G4N | Anthem Blue Cross Blue Shield of Virginia |
| G4T | BCBS of Illinois |
| G5A | BCBS of Minnesota |
| G5D | BCBS of Texas |
| G5E | BCBS of Texas |
| G5F | BCBS of Texas |
| G5G | BCBS of Texas |
| G5H | BCBS of Texas |
| G5K | BCBS of Texas |
| G5M | BCBS of Texas |
| G5N | Blue Cross Blue Shield of Western New York |
| G5T | BCBS of Illinois |
| G6A | Anthem Blue Cross Blue Shield of Virginia |
| G6T | BCBS of Illinois |
| G6W | Horizon BCBS of New Jersey |
| G7A | BCBS of Massachusetts |
| G7C | Anthem Blue Cross Blue Shield of Virginia |
| G7E | Regence Blue Shield of Washington |
| G7P | Blue Cross Blue Shield of Western New York |
| G7T | BCBS of Illinois |
| G8A | Blue Cross Blue Shield of Montana |
| G8C | BCBS of Illinois |
| G8H | BCBS of Texas |
| G8T | BCBS of Illinois |
