Health insurance is a vast and complex world, and one of the prominent players in the United States is Blue Cross Blue Shield (BCBS). To streamline their operations and facilitate efficient claims processing, BCBS uses a unique identification system involving three-letter prefixes. Among these, the BCBS Prefix EAA to EZZ holds particular significance as each prefix within this range corresponds to a specific region or plan type within the BCBS network.
| BCBS Prefix | BCBS Plan |
|---|---|
| E2A | BCBS of Texas |
| E2B | BCBS of Texas |
| E2C | Anthem BCBS Indiana |
| E2E | Regence BCBS of Oregon |
| E2F | Blue Cross of California |
| E2G | Blue Cross of California |
| E2K | BCBS of Illinois |
| E2L | BCBS of Massachusetts |
| E2M | BCBS of Texas |
| E2N | BCBS of Illinois |
| E2P | Blue Cross of California |
| E2Q | Blue Cross of California |
| E2R | Blue Cross of California |
| E2S | Regence BCBS of Oregon |
| E2T | BCBS of Massachusetts |
| E2U | Blue Cross of California |
| E2V | BCBS of Illinois |
| E2W | Blue Cross of California |
| E2X | Anthem Blue Cross of California |
| E2Y | Blue Cross of California |
| E2Z | Blue Cross of California |
| E3A | BCBS of Massachusetts |
| E3B | Blue Cross of California |
| E3D | Blue Cross of California |
| E3E | Anthem Blue Cross of California |
| E3G | BCBS of Illinois |
| E3M | Anthem BCBS Wisconsin |
| E3N | Premera Blue Cross |
| E3P | Anthem BCBS Wisconsin |
| E3S | BCBS of Illinois |
| E3U | Empire BCBS |
| E3V | BCBS of Illinois |
| E3X | Anthem BCBS Wisconsin |
| E3Y | BCBS of Georgia |
| E3Z | Anthem BCBS Wisconsin |
| E4A | BCBS of Massachusetts |
| E4B | BCBS of Massachusetts |
| E4C | BCBS of Massachusetts |
| E4D | BCBS of Massachusetts |
| E4E | BCBS of Massachusetts |
| E4L | Anthem BCBS Indiana |
| E4T | Blue Cross of California |
| E5A | BCBS of Texas |
| E5H | Premera Blue Cross |
| E5N | BCBS of Texas |
| E5S | BCBS of Texas |
| E5X | Premera Blue Cross |
| E6A | Anthem BCBS Ohio |
| E6D | Empire BCBS |
| E6T | Anthem BCBS Wisconsin |
| E8C | BCBS of Texas |
| E8E | BCBS of Texas |
| E8N | BCBS of Texas |
| E9A | Anthem BCBS Wisconsin |
| E9B | Anthem BCBS Wisconsin |
| EAA | BCBS of Rhode Island |
| EAB | BCBS of South Carolina |
| EAC | Anthem BCBS Virginia |
| EAD | BCBS of Illinois |
| EAE | Regence BCBS of Oregon |
| EAF | BCBS of Massachusetts |
| EAG | Capital Blue Cross |
| EAH | BCBS Alabama |
| EAI | Anthem BCBS Ohio |
| EAJ | CareFirst BCBS |
| EAK | Anthem BCBSf of Ohio |
| EAL | Anthem BCBS Connecticut |
| EAM | BCBS Alabama |
| EAN | CareFirst BCBS |
| EAO | CareFirst BCBS |
| EAP | CareFirst BCBS |
| EAQ | BCBS of South Carolina |
| EAR | BCBS of Texas |
| EAS | Blue Shield of California |
| EAT | BCBS of Texas |
| EAU | Unassigned |
| EAV | BCBS of Texas |
| EAW | Blue Cross of California |
| EAX | BCBS of Texas |
| EAY | BCBS of Texas |
| EAZ | BCBS of Arizona |
| EBA | Blue Cross of California |
| EBB | Independence Blue Cross |
| EBC | BCBS of Texas |
| EBD | Wellmark BCBS |
| EBE | CareFirst BCBS |
| EBF | Blue Shield of California |
| EBG | BCBS of Kansas City |
| EBH | Capital Blue Cross |
| EBI | BCBS Alabama |
| EBJ | Anthem BCBS Wisconsin |
| EBK | Wellmark BCBS |
| EBL | Wellmark BCBS |
| EBM | BCBS of Michigan |
| EBN | Empire BCBS |
| EBO | CareFirst BCBS |
| EBP | CareFirst BCBS |
| EBQ | BCBS of Illinois |
| EBR | Wellmark BCBS |
| EBS | Blue Cross of California |
| EBT | BCBS of Louisiana |
| EBU | Highmark BCBS Pennsylvania |
| EBV | Blue Cross of California |
| EBW | BCBS of Tennessee Commercial |
| EBX | Wellmark BCBS |
| EBY | BCBS of Illinois |
| EBZ | Blue Shield of California |
| ECA | CareFirst BCBS |
| ECB | BCBS Alabama |
| ECC | BCBS of Tennessee Commercial |
| ECD | Blue Shield of Northeastern New York |
| ECE | BCBS of Mississippi |
| ECF | Unassigned |
| ECG | Anthem BCBS Wisconsin |
| ECH | Anthem BCBS Ohio |
| ECI | CareFirst BCBS |
| ECJ | Anthem BCBS Ohio |
| ECK | BCBS of North Carolina |
| ECL | Anthem BCBS Ohio |
| ECM | CareFirst BCBS |
| ECN | Anthem BCBS Missouri |
| ECO | BCBS of Illinois |
| ECP | BCBS of Texas |
| ECQ | Highmark BCBS Pennsylvania |
| ECR | Anthem BCBS Ohio |
| ECS | Anthem BCBS Ohio |
| ECT | CareFirst BCBS |
| ECU | Blue Cross of Idaho |
| ECV | Anthem BCBS Ohio |
| ECW | Regence BCBS of Utah |
| ECX | BCBS of Minnesota |
| ECY | BCBS of Texas |
| ECZ | BCBS of Texas |
| EDA | BCBS of Georgia |
| EDB | Anthem BCBS Ohio |
| EDC | BCBS of South Carolina |
| EDD | BCBS of Georgia |
| EDE | Highmark BCBS Pennsylvania |
| EDF | Anthem BCBS Wisconsin |
| EDG | Capital Blue Cross |
| EDH | Blue Cross of Idaho |
| EDI | Blue Shield of California |
| EDJ | BCBS of Illinois |
| EDK | Empire BCBS |
| EDL | CareFirst BCBS |
| EDM | Premera Blue Cross |
| EDN | CareFirst BCBS |
| EDO | BCBS of Arkansas |
| EDP | BCBS of Michigan |
| EDQ | CareFirst BCBS |
| EDR | BCBS of Minnesota |
| EDS | BCBS of South Carolina |
| EDT | CareFirst BCBS |
| EDU | BCBS Alabama |
| EDV | BCBS of South Carolina |
| EDW | Anthem BCBS Ohio |
| EDX | BCBS of Texas |
| EDY | CareFirst BCBS |
| EDZ | BCBS of Massachusetts |
| EEA | Excellus BCBS |
| EEB | Florida Blue |
| EEC | BCBS of Illinois |
| EED | BCBS of Illinois |
| EEE | CareFirst BCBS |
| EEF | BCBS of Minnesota |
| EEG | BCBS Alabama |
| EEH | Unassigned |
| EEI | Blue Shield of Northeastern New York |
| EEJ | BCBS of Illinois |
| EEK | BCBS of Nebraska |
| EEL | Unassigned |
| EEM | Blue Cross of Idaho |
| EEN | Independence Blue Cross |
| EEO | Blue Shield of California |
| EEP | CareFirst BCBS |
| EEQ | Wellmark BCBS |
| EER | Blue Shield of California |
| EES | BCBS of South Carolina |
| EET | Excellus BCBS |
| EEU | BCBS of Nebraska |
| EEV | CareFirst BCBS |
| EEW | Anthem BCBS Wisconsin |
| EEX | Capital Blue Cross |
| EEY | Empire BCBS |
| EEZ | BCBS of Illinois |
| EFA | Blue Cross of California |
| EFB | CareFirst BCBS |
| EFC | Wellmark BCBS |
| EFD | Blue Shield of California |
| EFE | Unassigned |
| EFF | BCBS of Massachusetts |
| EFG | BCBS of Minnesota |
| EFH | Regence BCBS of Oregon |
| EFI | Highmark BCBS Pennsylvania |
| EFJ | BCBS of Massachusetts |
| EFK | Wellmark BCBS |
| EFL | BCBS of Texas |
| EFM | Anthem BCBS Colorado |
| EFN | CareFirst BCBS |
| EFO | Blue Shield of California |
| EFP | BCBS of Georgia |
| EFQ | BCBS of Massachusetts |
| EFR | CareFirst BCBS |
| EFS | BCBS of South Carolina |
| EFT | Unassigned |
| EFU | Anthem BCBS Virginia |
| EFV | BCBS of Illinois |
| EFW | Blue Cross of California |
| EFX | Wellmark BCBS |
| EFY | Blue Shield of California |
| EFZ | BCBS of Illinois |
| EGA | BCBS of Illinois |
| EGB | Highmark BCBS Pennsylvania |
| EGC | BCBS of Louisiana |
| EGD | Independence Blue Cross |
| EGE | Unassigned |
| EGF | Anthem BCBS Ohio |
| EGG | CareFirst BCBS |
| EGH | Blue Cross of California |
| EGI | Wellmark BCBS |
| EGJ | CareFirst BCBS |
| EGK | CareFirst BCBS |
| EGL | Anthem BCBS Missouri |
| EGM | BCBS of Texas |
| EGN | Premera Blue Cross |
| EGO | Independence Blue Cross |
| EGP | Blue Shield of California |
| EGQ | CareFirst BCBS |
| EGR | BCBS of Texas |
| EGS | Blue Cross of California |
| EGT | BCBS of Massachusetts |
| EGU | Regence BCBS of Oregon |
| EGV | BCBS of Arkansas |
| EGW | CareFirst BCBS |
| EGX | Blue Cross of California |
| EGY | CareFirst BCBS |
| EGZ | Premera Blue Cross |
| EHA | CareFirst BCBS |
| EHB | Unassigned |
| EHC | Unassigned |
| EHD | CareFirst BCBS |
| EHE | Unassigned |
| EHF | Anthem BCBS Connecticut |
| EHG | Anthem BCBS Maine |
| EHH | Anthem BCBS New Hampshire |
| EHI | BCBS Illinois |
| EHJ | BCBS of Massachusetts |
| EHK | Anthem BCBS New Hampshire |
| EHL | BCBS of Minnesota |
| EHM | Blue Shield of California |
| EHN | BCBS of Nebraska |
| EHO | Horizon BCBS of New Jersey |
| EHP | BCBS of Illinois |
| EHQ | CareFirst BCBS |
| EHR | Unassigned |
| EHS | Blue Shield of California |
| EHT | CareFirst BCBS |
| EHU | CareFirst BCBS |
| EHV | Unassigned |
| EHW | Unassigned |
| EHX | Unassigned |
| EHY | BCBS of Illinois |
| EHZ | BCBS of Georgia |
| EIA | CareFirst BCBS |
| EIB | BCBS Alabama |
| EIC | Blue Shield of California |
| EID | CareFirst BCBS |
| EIE | BCBS of South Carolina |
| EIF | CareFirst BCBS |
| EIG | Independence Blue Cross |
| EIH | CareFirst BCBS |
| EII | BCBS of South Carolina |
| EIJ | Blue Cross of California |
| EIK | CareFirst BCBS |
| EIL | BCBS of North Carolina |
| EIM | Independence Blue Cross |
| EIN | CareFirst BCBS |
| EIO | BCBS Alabama |
| EIP | Unassigned |
| EIQ | Premera Blue Cross |
| EIR | Highmark BCBS Pennsylvania |
| EIS | Blue Shield of California |
| EIT | Carefirst Administrators |
| EIU | BCBS of Illinois |
| EIV | BCBS of South Carolina |
| EIW | BCBS of Michigan |
| EIX | BCBS Alabama |
| EIY | Blue Shield of California |
| EIZ | Independence Blue Cross |
| EJA | Anthem BCBS Wisconsin |
| EJB | Anthem BCBS Colorado |
| EJC | BCBS of Texas |
| EJD | Blue Cross of California |
| EJE | BCBS of Michigan |
| EJF | CareFirst BCBS |
| EJG | Anthem BCBS Wisconsin |
| EJH | Highmark BCBS Pennsylvania |
| EJI | BCBS of Michigan |
| EJJ | Blue Cross of California |
| EJK | Blue Cross of California |
| EJL | BCBS of Mississippi |
| EJM | Anthem BCBS Missouri |
| EJN | Blue Cross of California |
| EJO | Blue Cross of California |
| EJP | BCBS of Minnesota |
| EJQ | Blue Cross of California |
| EJR | Highmark BCBS Pennsylvania |
| EJS | BCBS of Illinois |
| EJT | BCBS of Texas |
| EJU | Blue Cross of California |
| EJV | Blue Cross of California |
| EJW | BCBS of Michigan |
| EJX | BCBS of Arizona |
| EJY | BCBS of Arizona |
| EJZ | BCBS of Tennessee Commercial |
| EKA | BCBS of South Carolina |
| EKB | Wellmark BCBS |
| EKC | Anthem BCBS Ohio |
| EKD | Blue Cross of California |
| EKE | BCBS of Texas |
| EKF | BCBS of South Carolina |
| EKG | Wellmark BCBS |
| EKH | BCBS of New Mexico |
| EKI | CareFirst BCBS |
| EKJ | BCBS of South Carolina |
| EKK | BCBS of Minnesota |
| EKL | BCBS of Kansas City |
| EKM | Anthem BCBS Ohio |
| EKN | Premera Blue Cross |
| EKO | CareFirst BCBS |
| EKP | BCBS of South Carolina |
| EKQ | CareFirst BCBS |
| EKR | CareFirst BCBS |
| EKS | Highmark BCBS Pennsylvania |
| EKT | Blue Shield of California |
| EKU | Anthem BCBS Ohio |
| EKV | CareFirst BCBS |
| EKW | BCBS of Georgia |
| EKX | Wellmark BCBS |
| EKY | Anthem BCBS Ohio |
| EKZ | CareFirst BCBS |
| ELA | BCBS of Minnesota |
| ELB | BCBS of Texas |
| ELC | CareFirst BCBS |
| ELD | Anthem BCBS Ohio |
| ELE | BCBS of Texas |
| ELF | Anthem BCBS Wisconsin |
| ELG | BCBS of Minnesota |
| ELH | Anthem BCBS Connecticut |
| ELI | BCBS of Massachusetts |
| ELJ | Blue Cross of California |
| ELK | Wellmark BCBS |
| ELL | Blue Cross of California |
| ELM | BCBS of Illinois |
| ELN | CareFirst BCBS |
| ELO | BCBS of South Carolina |
| ELP | BCBS of Minnesota |
| ELQ | Anthem BCBS Missouri |
| ELR | BCBS Western New York |
| ELS | Unassigned |
| ELT | BCBS of Illinois |
| ELU | Unassigned |
| ELV | BCBS of South Carolina |
| ELW | Anthem BCBS Missouri |
| ELX | Wellmark BCBS |
| ELY | Anthem BCBS Ohio |
| ELZ | Anthem BCBS Kentucky |
| EM2 | Unassigned |
| EMA | BCBS of South Carolina |
| EMB | Anthem BCBS Ohio |
| EMC | BCBS of South Carolina |
| EMD | Wellmark BCBS |
| EME | Wellmark BCBS |
| EMF | Blue Shield of California |
| EMG | CareFirst BCBS |
| EMH | Independence Blue Cross |
| EMI | Anthem BCBS Indiana |
| EMJ | Anthem BCBS Ohio |
| EMK | BCBS of South Carolina |
| EML | CareFirst BCBS |
| EMM | CareFirst BCBS |
| EMN | Highmark BCBS Pennsylvania |
| EMO | BCBS of South Carolina |
| EMP | BCBS of Illinois |
| EMQ | BCBS Alabama |
| EMR | BCBS Alabama |
| EMS | BCBS of Georgia |
| EMT | Blue Cross of California |
| EMU | CareFirst BCBS |
| EMV | BCBS Alabama |
| EMW | BCBS of Michigan |
| EMX | BCBS of Georgia |
| EMY | Premera Blue Cross |
| EMZ | BCBS of Georgia |
| ENA | Blue Cross of California |
| ENB | Florida Blue |
| ENC | Anthem BCBS Virginia |
| END | BCBS of Oklahoma |
| ENE | Independence Blue Cross |
| ENF | BCBS of Texas |
| ENG | Wellmark BCBS |
| ENH | Unassigned |
| ENI | BCBS of Minnesota |
| ENJ | BCBS of Minnesota |
| ENK | Blue Cross of Idaho |
| ENL | BCBS of Massachusetts |
| ENM | CareFirst BCBS |
| ENN | BCBS of South Carolina |
| ENO | Anthem BCBS Kentucky |
| ENP | BCBS of Nebraska |
| ENQ | Wellmark BCBS |
| ENR | BCBS of Massachusetts |
| ENS | Capital Blue Cross |
| ENT | BCBS of Texas |
| ENU | BCBS Alabama |
| ENV | Independence Blue Cross |
| ENW | Blue Shield of California |
| ENX | Blue Cross of Idaho |
| ENY | Anthem BCBS Wisconsin |
| ENZ | BCBS of Illinois |
| EOA | Anthem BCBS Ohio |
| EOB | CareFirst BCBS |
| EOC | Blue Shield of California |
| EOD | Highmark BCBS Pennsylvania |
| EOE | Blue Cross of Idaho |
| EOF | Capital Blue Cross |
| EOG | Anthem BCBS Missouri |
| EOH | Blue Cross of California |
| EOI | CareFirst BCBS |
| EOJ | BCBS of Michigan |
| EOK | Wellmark BCBS |
| EOL | Unassigned |
| EOM | Highmark BCBS Pennsylvania |
| EON | Horizon BCBS of New Jersey |
| EOO | BCBS of South Carolina |
| EOP | Blue Cross of California |
| EOQ | BCBS of South Carolina |
| EOR | Unassigned |
| EOS | Independence Blue Cross |
| EOT | BCBS of South Carolina |
| EOU | Wellmark BCBS |
| EOV | BCBS of Michigan |
| EOW | Unassigned |
| EOX | Premera Blue Cross |
| EOY | BCBS of South Carolina |
| EOZ | BCBS of South Carolina |
| EPA | Anthem BCBS Ohio |
| EPB | Blue Shield of California |
| EPC | Anthem BCBS Missouri |
| EPD | BCBS of Michigan |
| EPE | Blue Cross of Idaho |
| EPF | Blue Shield of California |
| EPG | Blue Shield of California |
| EPH | BCBS of South Carolina |
| EPI | Wellmark BCBS |
| EPJ | BCBS of Rhode Island |
| EPK | BCBS of Tennessee Commercial |
| EPL | Anthem BCBS Missouri |
| EPM | Blue Shield of Northeastern New York |
| EPN | BCBS of Texas |
| EPO | Blue Shield of California |
| EPP | Empire BCBS |
| EPQ | Capital Blue Cross |
| EPR | Independence Blue Cross |
| EPS | BCBS of Illinois |
| EPT | BCBS Alabama |
| EPU | Blue Shield of California |
| EPV | BCBS of Massachusetts |
| EPW | Blue Cross of California |
| EPX | Independence Blue Cross |
| EPY | CareFirst BCBS |
| EPZ | BCBS of Minnesota |
| EQA | CareFirst BCBS |
| EQB | BCBS Alabama |
| EQC | Blue Shield of California |
| EQD | BCBS of Massachusetts |
| EQE | BCBS of Nebraska |
| EQF | BCBS Western New York |
| EQG | BCBS of Tennessee Commercial |
| EQH | BCBS of Tennessee Commercial |
| EQI | BCBS of South Carolina |
| EQJ | Independence Blue Cross |
| EQK | Anthem BCBS Indiana |
| EQL | BCBS Western New York |
| EQM | BCBS of Massachusetts |
| EQN | BCBS of South Carolina |
| EQO | BCBS of South Carolina |
| EQP | Empire BCBS |
| EQQ | CareFirst BCBS |
| EQR | BCBS Western New York |
| EQS | Independence Blue Cross |
| EQT | Anthem BCBS Ohio |
| EQU | BCBS of Texas |
| EQV | Empire BCBS |
| EQW | CareFirst BCBS |
| EQX | BCBS of South Carolina |
| EQY | Blue Cross of California |
| EQZ | BCBS of Minnesota |
| ERA | BCBS Western New York |
| ERB | Premera Blue Cross |
| ERC | Regence Blue Shield of Washington |
| ERD | BCBS of South Carolina |
| ERE | Premera Blue Cross |
| ERF | CareFirst BCBS |
| ERG | BCBS Alabama |
| ERH | BCBS of Massachusetts |
| ERI | BCBS of Rhode Island |
| ERJ | BCBS of South Carolina |
| ERK | BCBS of Massachusetts |
| ERL | CareFirst BCBS |
| ERM | BCBS of Massachusetts |
| ERN | Anthem BCBS Ohio |
| ERO | BCBS of South Carolina |
| ERP | Capital Blue Cross |
| ERQ | Unassigned |
| ERR | BCBS of Arkansas |
| ERS | Independence Blue Cross |
| ERT | Wellmark BCBS |
| ERU | CareFirst BCBS |
| ERV | BCBS of Rhode Island |
| ERW | Wellmark BCBS |
| ERX | Blue Shield of California |
| ERY | Anthem BCBS Ohio |
| ERZ | Unassigned |
| ESA | Wellmark BCBS |
| ESB | BCBS of Michigan |
| ESC | Unassigned |
| ESD | BCBS of Massachusetts |
| ESE | Anthem BCBS Ohio |
| ESF | Blue Shield of California |
| ESG | BCBS of Texas |
| ESH | CareFirst BCBS |
| ESI | Capital Blue Cross |
| ESJ | Capital Blue Cross |
| ESK | Wellmark BCBS |
| ESL | Unassigned |
| ESM | Anthem BCBS Missouri |
| ESN | Anthem BCBS Missouri |
| ESO | Regence BCBS of Oregon |
| ESP | Unassigned |
| ESQ | Wellmark BCBS |
| ESR | CareFirst BCBS |
| ESS | BCBS of Massachusetts |
| EST | BCBS Western New York |
| ESU | Blue Shield of California |
| ESV | BCBS Western New York |
| ESW | Blue Shield of California |
| ESX | Wellmark BCBS |
| ESY | BCBS of Georgia |
| ESZ | BCBS of Tennessee Commercial |
| ETA | BCBS of Illinois |
| ETB | BCBS of Minnesota |
| ETC | Anthem BCBS Virginia |
| ETD | Blue Cross of California |
| ETE | Premera Blue Cross |
| ETF | BCBS of Georgia |
| ETG | BCBS of Illinois |
| ETH | BCBS of Illinois |
| ETI | Anthem BCBS Missouri |
| ETJ | BCBS of Georgia |
| ETK | Anthem BCBS Wisconsin |
| ETL | Blue Shield of Northeastern New York |
| ETM | Highmark BCBS Pennsylvania |
| ETN | Unassigned |
| ETO | Unassigned |
| ETP | BCBS of Georgia |
| ETQ | BCBS of Kansas City |
| ETR | Empire BCBS |
| ETS | BCBS of Massachusetts |
| ETT | Highmark BCBS Pennsylvania |
| ETU | BCBS of Massachusetts |
| ETV | Anthem BCBS Missouri |
| ETW | CareFirst BCBS |
| ETX | BCBS of South Carolina |
| ETY | Unassigned |
| ETZ | BCBS of Georgia |
| EUA | Blue Cross of California |
| EUB | Unassigned |
| EUC | Anthem BCBS Ohio |
| EUD | BCBS of South Carolina |
| EUE | CareFirst BCBS |
| EUF | Regence BCBS of Utah |
| EUG | Regence Blue Shield of Washington |
| EUH | BCBS of Illinois |
| EUI | Anthem BCBS Ohio |
| EUJ | Wellmark BCBS |
| EUK | BCBS of Illinois |
| EUL | Anthem BCBS Ohio |
| EUM | BCBS of Vermont |
| EUN | Blue Shield of California |
| EUO | BCBS of South Carolina |
| EUP | BCBS of Georgia |
| EUQ | Unassigned |
| EUR | BCBS of Nebraska |
| EUS | Florida Blue |
| EUT | CareFirst BCBS |
| EUU | Florida Blue |
| EUV | BCBS of Michigan |
| EUW | CareFirst BCBS |
| EUX | CareFirst BCBS |
| EUY | BCBS of Georgia |
| EUZ | CareFirst BCBS |
| EVA | Wellmark BCBS |
| EVB | BCBS of Tennessee Commercial |
| EVC | BCBS of Massachusetts |
| EVD | Blue Shield of California |
| EVE | BCBS of North Carolina |
| EVF | BCBS Alabama |
| EVG | Regence Blue Shield of Washington |
| EVH | Wellmark BCBS |
| EVI | BCBS of Arkansas |
| EVJ | BCBS of Massachusetts |
| EVK | Wellmark BCBS |
| EVL | BCBS of Georgia |
| EVM | Anthem BCBS Missouri |
| EVN | Regence BCBS of Oregon |
| EVO | Blue Shield of California |
| EVP | BCBS of South Carolina |
| EVQ | Anthem BCBS Colorado |
| EVR | Blue Cross of California |
| EVS | BCBS of South Carolina |
| EVT | BCBS of Vermont |
| EVU | BCBS of South Carolina |
| EVV | Blue Shield of California |
| EVW | BCBS of Massachusetts |
| EVX | BCBS of Massachusetts |
| EVY | Anthem BCBS Ohio |
| EVZ | CareFirst BCBS |
| EWA | CareFirst BCBS |
| EWB | Anthem BCBS Ohio |
| EWC | CareFirst BCBS |
| EWD | BCBS of Minnesota |
| EWE | Unassigned |
| EWF | Empire BCBS |
| EWG | Anthem BCBS Ohio |
| EWH | Wellmark BCBS |
| EWI | BCBS of Michigan |
| EWJ | Blue Cross of California |
| EWK | Unassigned |
| EWL | Unassigned |
| EWM | Anthem BCBS Ohio |
| EWN | Unassigned |
| EWO | BCBS of South Carolina |
| EWP | Anthem BCBS Missouri |
| EWQ | Anthem BCBS Connecticut |
| EWR | Independence Blue Cross |
| EWS | Horizon BCBS of New Jersey |
| EWT | BCBS of Georgia |
| EWU | Anthem BCBS Connecticut |
| EWV | Anthem BCBS Virginia |
| EWW | Anthem BCBS Ohio |
| EWX | BCBS of Arizona |
| EWY | Wellmark BCBS |
| EWZ | Blue Cross of California |
| EXA | BCBS Arkansas |
| EXB | Unassigned |
| EXC | Anthem BCBS Ohio |
| EXD | Premera Blue Cross |
| EXE | BCBS of Georgia |
| EXF | Anthem BCBS Missouri |
| EXG | BCBS of Minnesota |
| EXH | Anthem BCBS Ohio |
| EXI | Anthem BCBS Ohio |
| EXJ | Empire BCBS |
| EXK | Anthem BCBS Ohio |
| EXL | Empire BCBS |
| EXM | Anthem BCBS Missouri |
| EXN | BCBS of Texas |
| EXO | Blue Shield of California |
| EXP | Premera Blue Cross |
| EXQ | Blue Cross of California |
| EXR | BCBS of Massachusetts |
| EXS | BCBS of Illinois |
| EXT | Anthem BCBS Virginia |
| EXU | BCBS of Massachusetts |
| EXV | BCBS of Texas |
| EXW | Unassigned |
| EXX | BCBS of Arkansas |
| EXY | BCBS of Massachusetts |
| EXZ | Premera Blue Cross |
| EYA | BCBS of Massachusetts |
| EYB | CareFirst BCBS |
| EYC | Horizon BCBS of New Jersey |
| EYD | Anthem BCBS Connecticut |
| EYE | Wellmark BCBS |
| EYF | Wellmark BCBS |
| EYG | Empire BCBS |
| EYH | Anthem BCBS Ohio |
| EYI | BCBS of Georgia |
| EYJ | BCBS of South Carolina |
| EYK | Wellmark BCBS |
| EYL | Horizon BCBS of New Jersey |
| EYM | Wellmark BCBS |
| EYN | BCBS of Minnesota |
| EYO | BCBS of Georgia |
| EYP | Wellmark BCBS |
| EYQ | BCBS of South Carolina |
| EYR | BCBS of Illinois |
| EYS | BCBS of Tennessee Commercial |
| EYT | Horizon BCBS of New Jersey |
| EYU | Anthem BCBS Ohio |
| EYV | Blue Cross of Idaho |
| EYW | CareFirst BCBS |
| EYX | Unassigned |
| EYY | Capital Blue Cross |
| EYZ | BCBS of Tennessee Commercial |
| EZA | BCBS of Oklahoma |
| EZB | Regence BCBS of Oregon |
| EZC | Anthem BCBS Wisconsin |
| EZD | Premera Blue Cross |
| EZE | Anthem BCBS Missouri |
| EZF | Capital Blue Cross |
| EZG | BCBS of Texas |
| EZH | BCBS of Massachusetts |
| EZI | BCBS of Massachusetts |
| EZJ | BCBS of Georgia |
| EZK | BCBS of Georgia |
| EZL | Empire BCBS |
| EZM | Anthem BCBS Ohio |
| EZN | BCBS of South Carolina |
| EZO | Capital Blue Cross |
| EZP | BCBS of Minnesota |
| EZQ | BCBS of South Carolina |
| EZR | Anthem BCBS Missouri |
| EZS | CareFirst BCBS |
| EZT | Blue Cross of California |
| EZU | BCBS of South Carolina |
| EZV | Anthem BCBS Ohio |
| EZW | BCBS of Louisiana |
| EZX | BCBS of Massachusetts |
| EZY | BCBS Alabama |
| EZZ | Wellmark BCBS |