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