| BCBS Prefix List 2024 - Alpha | State Lookup | BCBS Company |
|---|---|---|
| EAA | - | Unallocated/Not Assigned |
| EAB | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| EAC | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| EAD | Illinois | Blue-Cross Blue-Shield of Illinois |
| EAE | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| EAF | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EAG | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| EAH | Alabama | Blue-Cross Blue-Shield of Alabama |
| EAI | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| EAJ | - | Unallocated/Not Assigned |
| EAK | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EAL | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| EAM | Alabama | Blue-Cross Blue-Shield of Alabama |
| EAN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EAO | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EAP | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EAQ | Florida | Florida-Blue |
| EAR | - | Unallocated/Not Assigned |
| EAS | California | Blue-Shield of California |
| EAT | Texas | Blue-Cross Blue-Shield of Texas |
| EAU | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| EAV | Texas | Blue-Cross Blue-Shield of Texas |
| EAW | - | Unallocated/Not Assigned |
| EAX | - | Unallocated/Not Assigned |
| EAY | Texas | Blue-Cross Blue-Shield of Texas |
| EAZ | Arizona | Blue-Cross Blue-Shield of Arizona |
| EBA | California | Anthem Blue-Cross |
| EBB | - | Unallocated/Not Assigned |
| EBC | Texas | Blue-Cross Blue-Shield of Texas |
| EBD | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EBE | - | Unallocated/Not Assigned |
| EBF | - | Unallocated/Not Assigned |
| EBG | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| EBH | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| EBI | Alabama | Blue-Cross Blue-Shield of Alabama |
| EBJ | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| EBK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EBL | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EBM | - | Unallocated/Not Assigned |
| EBN | New York | Empire Blue-Cross Blue-Shield of New York |
| EBO | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EBP | - | Unallocated/Not Assigned |
| EBQ | Illinois | Blue-Cross Blue-Shield of Illinois |
| EBR | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EBS | - | Unallocated/Not Assigned |
| EBT | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| EBU | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| EBV | California | Anthem Blue-Cross |
| EBW | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| EBX | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EBY | Illinois | Blue-Cross Blue-Shield of Illinois |
| EBZ | California | Blue-Shield of California |
| ECA | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ECB | Alabama | Blue-Cross Blue-Shield of Alabama |
| ECC | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| ECD | California | Anthem Blue-Cross |
| ECE | Mississippi | Blue-Cross Blue-Shield of Mississippi |
| ECF | - | Unallocated/Not Assigned |
| ECG | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| ECH | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ECI | - | Unallocated/Not Assigned |
| ECJ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ECK | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| ECL | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ECM | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ECN | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| ECO | Illinois | Blue-Cross Blue-Shield of Illinois |
| ECP | Texas | Blue-Cross Blue-Shield of Texas |
| ECQ | - | Unallocated/Not Assigned |
| ECR | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ECS | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ECT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ECU | Idaho | Blue-Cross of Idaho |
| ECV | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ECW | - | Unallocated/Not Assigned |
| ECX | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| ECY | Texas | Blue-Cross Blue-Shield of Texas |
| ECZ | Texas | Blue-Cross Blue-Shield of Texas |
| EDA | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EDB | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EDC | Florida | Florida-Blue |
| EDD | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EDE | - | Unallocated/Not Assigned |
| EDF | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| EDG | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| EDH | Idaho | Blue-Cross of Idaho |
| EDI | California | Blue-Shield of California |
| EDJ | Illinois | Blue-Cross Blue-Shield of Illinois |
| EDK | - | Unallocated/Not Assigned |
| EDL | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EDM | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| EDN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EDO | Arkansas | Arkansas Blue-Cross Blue-Shield |
| EDP | Michigan | Blue-Cross Blue-Shield of Michigan |
| EDQ | - | Unallocated/Not Assigned |
| EDR | - | Unallocated/Not Assigned |
| EDS | Florida | Florida-Blue |
| EDT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EDU | Alabama | Blue-Cross Blue-Shield of Alabama |
| EDV | Florida | Florida-Blue |
| EDW | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EDX | Texas | Blue-Cross Blue-Shield of Texas |
| EDY | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EDZ | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EEA | - | Unallocated/Not Assigned |
| EEB | Florida | Florida-Blue |
| EEC | Illinois | Blue-Cross Blue-Shield of Illinois |
| EED | Illinois | Blue-Cross Blue-Shield of Illinois |
| EEE | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EEF | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| EEG | Alabama | Blue-Cross Blue-Shield of Alabama |
| EEH | Ohio | Blue-Cross Blue-Shield of Ohio |
| EEI | - | Unallocated/Not Assigned |
| EEJ | Illinois | Blue-Cross Blue-Shield of Illinois |
| EEK | - | Unallocated/Not Assigned |
| EEL | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| EEM | - | Unallocated/Not Assigned |
| EEN | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| EEO | California | Blue-Shield of California |
| EEP | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EEQ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EER | California | Blue-Shield of California |
| EES | Florida | Florida-Blue |
| EET | - | Unallocated/Not Assigned |
| EEU | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EEV | - | Unallocated/Not Assigned |
| EEW | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| EEX | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| EEY | New York | Empire Blue-Cross Blue-Shield of New York |
| EEZ | Illinois | Blue-Cross Blue-Shield of Illinois |
| EFA | California | Anthem Blue-Cross |
| EFB | - | Unallocated/Not Assigned |
| EFC | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EFD | California | Blue-Shield of California |
| EFE | - | Unallocated/Not Assigned |
| EFF | - | Unallocated/Not Assigned |
| EFG | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| EFH | - | Unallocated/Not Assigned |
| EFI | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| EFJ | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EFK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EFL | Texas | Blue-Cross Blue-Shield of Texas |
| EFM | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| EFN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EFO | - | Unallocated/Not Assigned |
| EFP | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EFQ | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EFR | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EFS | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EFT | - | Unallocated/Not Assigned |
| EFU | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| EFV | - | Unallocated/Not Assigned |
| EFW | California | Anthem Blue-Cross |
| EFX | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EFY | - | Unallocated/Not Assigned |
| EFZ | Illinois | Blue-Cross Blue-Shield of Illinois |
| EGA | Illinois | Blue-Cross Blue-Shield of Illinois |
| EGB | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| EGC | - | Unallocated/Not Assigned |
| EGD | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| EGE | - | Unallocated/Not Assigned |
| EGF | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EGG | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EGH | - | Unallocated/Not Assigned |
| EGI | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EGJ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EGK | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EGL | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| EGM | Texas | Blue-Cross Blue-Shield of Texas |
| EGN | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| EGO | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| EGP | California | Blue-Shield of California |
| EGQ | - | Unallocated/Not Assigned |
| EGR | Texas | Blue-Cross Blue-Shield of Texas |
| EGS | - | Unallocated/Not Assigned |
| EGT | - | Unallocated/Not Assigned |
| EGU | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| EGV | - | Unallocated/Not Assigned |
| EGW | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EGX | - | Unallocated/Not Assigned |
| EGY | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EGZ | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| EHA | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EHB | - | Unallocated/Not Assigned |
| EHC | - | Unallocated/Not Assigned |
| EHD | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EHE | - | Unallocated/Not Assigned |
| EHF | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| EHG | Maine | Anthem Blue-Cross Blue-Shield of Maine |
| EHH | New Hampshire | Anthem Blue-Cross Blue-Shield of New Hampshire |
| EHI | Illinois | Blue-Cross Blue-Shield of Illinois |
| EHJ | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EHK | New Hampshire | Anthem Blue-Cross Blue-Shield of New Hampshire |
| EHL | - | Unallocated/Not Assigned |
| EHM | California | Blue-Shield of California |
| EHN | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| EHO | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| EHP | Illinois | Blue-Cross Blue-Shield of Illinois |
| EHQ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EHR | - | Unallocated/Not Assigned |
| EHS | California | Blue-Shield of California |
| EHT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EHU | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EHV | - | Unallocated/Not Assigned |
| EHW | - | Unallocated/Not Assigned |
| EHX | - | Unallocated/Not Assigned |
| EHY | Illinois | Blue-Cross Blue-Shield of Illinois |
| EHZ | - | Unallocated/Not Assigned |
| EIA | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EIB | Alabama | Blue-Cross Blue-Shield of Alabama |
| EIC | - | Unallocated/Not Assigned |
| EID | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EIE | - | Unallocated/Not Assigned |
| EIF | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EIG | - | Unallocated/Not Assigned |
| EIH | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EII | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EIJ | - | Unallocated/Not Assigned |
| EIK | - | Unallocated/Not Assigned |
| EIL | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| EIM | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| EIN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EIO | - | Unallocated/Not Assigned |
| EIP | - | Unallocated/Not Assigned |
| EIQ | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| EIR | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| EIS | California | Blue-Shield of California |
| EIT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EIU | Illinois | Blue-Cross Blue-Shield of Illinois |
| EIV | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EIW | Michigan | Blue-Cross Blue-Shield of Michigan |
| EIX | Alabama | Blue-Cross Blue-Shield of Alabama |
| EIY | California | Blue-Shield of California |
| EIZ | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| EJA | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| EJB | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| EJC | Texas | Blue-Cross Blue-Shield of Texas |
| EJD | - | Unallocated/Not Assigned |
| EJE | Michigan | Blue-Cross Blue-Shield of Michigan |
| EJF | - | Unallocated/Not Assigned |
| EJG | - | Unallocated/Not Assigned |
| EJH | - | Unallocated/Not Assigned |
| EJI | Michigan | Blue-Cross Blue-Shield of Michigan |
| EJJ | California | Anthem Blue-Cross |
| EJK | California | Anthem Blue-Cross |
| EJL | Mississippi | Blue-Cross Blue-Shield of Mississippi |
| EJM | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| EJN | California | Anthem Blue-Cross |
| EJO | - | Unallocated/Not Assigned |
| EJP | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| EJQ | California | Anthem Blue-Cross |
| EJR | - | Unallocated/Not Assigned |
| EJS | - | Unallocated/Not Assigned |
| EJT | Texas | Blue-Cross Blue-Shield of Texas |
| EJU | California | Anthem Blue-Cross |
| EJV | California | Anthem Blue-Cross |
| EJW | Michigan | Blue-Cross Blue-Shield of Michigan |
| EJX | Arizona | Blue-Cross Blue-Shield of Arizona |
| EJY | Arizona | Blue-Cross Blue-Shield of Arizona |
| EJZ | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| EKA | - | Unallocated/Not Assigned |
| EKB | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EKC | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EKD | - | Unallocated/Not Assigned |
| EKE | Texas | Blue-Cross Blue-Shield of Texas |
| EKF | Florida | Florida-Blue |
| EKG | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EKH | New Mexico | Blue-Cross Blue-Shield of New Mexico |
| EKI | - | Unallocated/Not Assigned |
| EKJ | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EKK | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| EKL | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| EKM | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EKN | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| EKO | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EKP | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EKQ | - | Unallocated/Not Assigned |
| EKR | - | Unallocated/Not Assigned |
| EKS | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| EKT | California | Blue-Shield of California |
| EKU | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EKV | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EKW | - | Unallocated/Not Assigned |
| EKX | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EKY | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EKZ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ELA | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| ELB | Texas | Blue-Cross Blue-Shield of Texas |
| ELC | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ELD | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ELE | Texas | Blue-Cross Blue-Shield of Texas |
| ELF | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| ELG | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| ELH | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| ELI | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| ELJ | - | Unallocated/Not Assigned |
| ELK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| ELL | - | Unallocated/Not Assigned |
| ELM | Illinois | Blue-Cross Blue-Shield of Illinois |
| ELN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ELO | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| ELP | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| ELQ | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| ELR | - | Unallocated/Not Assigned |
| ELS | - | Unallocated/Not Assigned |
| ELT | Illinois | Blue-Cross Blue-Shield of Illinois |
| ELU | - | Unallocated/Not Assigned |
| ELV | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| ELW | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| ELX | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| ELY | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ELZ | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| EMA | Florida | Florida-Blue |
| EMB | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EMC | - | Unallocated/Not Assigned |
| EMD | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EME | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EMF | California | Blue-Shield of California |
| EMG | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EMH | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| EMI | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| EMJ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EMK | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EML | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EMM | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EMN | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| EMO | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| EMP | Illinois | Blue-Cross Blue-Shield of Illinois |
| EMQ | Alabama | Blue-Cross Blue-Shield of Alabama |
| EMR | Alabama | Blue-Cross Blue-Shield of Alabama |
| EMS | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EMT | California | Anthem Blue-Cross |
| EMU | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EMV | Alabama | Blue-Cross Blue-Shield of Alabama |
| EMW | Michigan | Blue-Cross Blue-Shield of Michigan |
| EMX | - | Unallocated/Not Assigned |
| EMY | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| EMZ | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| ENA | California | Anthem Blue-Cross |
| ENB | Florida | Florida-Blue |
| ENC | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| END | Oklahoma | Blue-Cross Blue-Shield of Oklahoma |
| ENE | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| ENF | Texas | Blue-Cross Blue-Shield of Texas |
| ENG | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| ENH | - | Unallocated/Not Assigned |
| ENI | - | Unallocated/Not Assigned |
| ENJ | - | Unallocated/Not Assigned |
| ENK | - | Unallocated/Not Assigned |
| ENL | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| ENM | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ENN | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| ENO | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| ENP | - | Unallocated/Not Assigned |
| ENQ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| ENR | - | Unallocated/Not Assigned |
| ENS | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| ENT | Texas | Blue-Cross Blue-Shield of Texas |
| ENU | Alabama | Blue-Cross Blue-Shield of Alabama |
| ENV | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| ENW | - | Unallocated/Not Assigned |
| ENX | Idaho | Blue-Cross of Idaho |
| ENY | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| ENZ | Illinois | Blue-Cross Blue-Shield of Illinois |
| EOA | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EOB | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EOC | California | Blue-Shield of California |
| EOD | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| EOE | Idaho | Blue-Cross of Idaho |
| EOF | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| EOG | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| EOH | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EOI | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EOJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| EOK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EOL | - | Unallocated/Not Assigned |
| EOM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| EON | - | Unallocated/Not Assigned |
| EOO | - | Unallocated/Not Assigned |
| EOP | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EOQ | - | Unallocated/Not Assigned |
| EOR | - | Unallocated/Not Assigned |
| EOS | - | Unallocated/Not Assigned |
| EOT | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EOU | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EOV | Michigan | Blue-Cross Blue-Shield of Michigan |
| EOW | - | Unallocated/Not Assigned |
| EOX | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| EOY | Florida | Florida-Blue |
| EOZ | - | Unallocated/Not Assigned |
| EPA | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EPB | - | Unallocated/Not Assigned |
| EPC | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| EPD | Michigan | Blue-Cross Blue-Shield of Michigan |
| EPE | Idaho | Blue-Cross of Idaho |
| EPF | California | Blue-Shield of California |
| EPG | California | Blue-Shield of California |
| EPH | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EPI | - | Unallocated/Not Assigned |
| EPJ | - | Unallocated/Not Assigned |
| EPK | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| EPL | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| EPM | California | Anthem Blue-Cross |
| EPN | Texas | Blue-Cross Blue-Shield of Texas |
| EPO | California | Blue-Shield of California |
| EPP | - | Unallocated/Not Assigned |
| EPQ | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| EPR | - | Unallocated/Not Assigned |
| EPS | - | Unallocated/Not Assigned |
| EPT | Alabama | Blue-Cross Blue-Shield of Alabama |
| EPU | - | Unallocated/Not Assigned |
| EPV | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EPW | - | Unallocated/Not Assigned |
| EPX | - | Unallocated/Not Assigned |
| EPY | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EPZ | - | Unallocated/Not Assigned |
| EQA | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EQB | Alabama | Blue-Cross Blue-Shield of Alabama |
| EQC | California | Blue-Shield of California |
| EQD | - | Unallocated/Not Assigned |
| EQE | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| EQF | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| EQG | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| EQH | - | Unallocated/Not Assigned |
| EQI | - | Unallocated/Not Assigned |
| EQJ | - | Unallocated/Not Assigned |
| EQK | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| EQL | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| EQM | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EQN | Florida | Florida-Blue |
| EQO | Florida | Florida-Blue |
| EQP | New York | Empire Blue-Cross Blue-Shield of New York |
| EQQ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EQR | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| EQS | - | Unallocated/Not Assigned |
| EQT | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EQU | Texas | Blue-Cross Blue-Shield of Texas |
| EQV | New York | Empire Blue-Cross Blue-Shield of New York |
| EQW | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EQX | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| EQY | California | Anthem Blue-Cross |
| EQZ | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| ERA | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| ERB | - | Unallocated/Not Assigned |
| ERC | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| ERD | Florida | Florida-Blue |
| ERE | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| ERF | - | Unallocated/Not Assigned |
| ERG | Alabama | Blue-Cross Blue-Shield of Alabama |
| ERH | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| ERI | - | Unallocated/Not Assigned |
| ERJ | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| ERK | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| ERL | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ERM | - | Unallocated/Not Assigned |
| ERN | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ERO | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| ERP | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| ERQ | - | Unallocated/Not Assigned |
| ERR | Arkansas | Arkansas Blue-Cross Blue-Shield |
| ERS | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| ERT | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| ERU | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ERV | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| ERW | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| ERX | California | Blue-Shield of California |
| ERY | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ERZ | - | Unallocated/Not Assigned |
| ESA | - | Unallocated/Not Assigned |
| ESB | Michigan | Blue-Cross Blue-Shield of Michigan |
| ESC | - | Unallocated/Not Assigned |
| ESD | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| ESE | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ESF | California | Blue-Shield of California |
| ESG | Texas | Blue-Cross Blue-Shield of Texas |
| ESH | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ESI | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| ESJ | - | Unallocated/Not Assigned |
| ESK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| ESL | Florida | Florida-Blue |
| ESM | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| ESN | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| ESO | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| ESP | - | Unallocated/Not Assigned |
| ESQ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| ESR | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ESS | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EST | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| ESU | California | Blue-Shield of California |
| ESV | California | Blue-Shield of California |
| ESW | California | Blue-Shield of California |
| ESX | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| ESY | - | Unallocated/Not Assigned |
| ESZ | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| ETA | Illinois | Blue-Cross Blue-Shield of Illinois |
| ETB | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| ETC | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| ETD | - | Unallocated/Not Assigned |
| ETE | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| ETF | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| ETG | Illinois | Blue-Cross Blue-Shield of Illinois |
| ETH | - | Unallocated/Not Assigned |
| ETI | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| ETJ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| ETK | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| ETL | California | Anthem Blue-Cross |
| ETM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| ETN | - | Unallocated/Not Assigned |
| ETO | - | Unallocated/Not Assigned |
| ETP | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| ETQ | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| ETR | New York | Empire Blue-Cross Blue-Shield of New York |
| ETS | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| ETT | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| ETU | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| ETV | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| ETW | - | Unallocated/Not Assigned |
| ETX | Florida | Florida-Blue |
| ETY | - | Unallocated/Not Assigned |
| ETZ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EUA | California | Anthem Blue-Cross |
| EUB | - | Unallocated/Not Assigned |
| EUC | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EUD | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| EUE | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EUF | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| EUG | - | Unallocated/Not Assigned |
| EUH | Illinois | Blue-Cross Blue-Shield of Illinois |
| EUI | - | Unallocated/Not Assigned |
| EUJ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EUK | Illinois | Blue-Cross Blue-Shield of Illinois |
| EUL | - | Unallocated/Not Assigned |
| EUM | Vermont | Blue-Cross Blue-Shield of Vermont |
| EUN | California | Blue-Shield of California |
| EUO | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EUP | - | Unallocated/Not Assigned |
| EUQ | - | Unallocated/Not Assigned |
| EUR | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| EUS | Florida | Florida-Blue |
| EUT | - | Unallocated/Not Assigned |
| EUU | Florida | Florida-Blue |
| EUV | Michigan | Blue-Cross Blue-Shield of Michigan |
| EUW | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EUX | - | Unallocated/Not Assigned |
| EUY | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EUZ | - | Unallocated/Not Assigned |
| EVA | - | Unallocated/Not Assigned |
| EVB | - | Unallocated/Not Assigned |
| EVC | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EVD | - | Unallocated/Not Assigned |
| EVE | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| EVF | Alabama | Blue-Cross Blue-Shield of Alabama |
| EVG | - | Unallocated/Not Assigned |
| EVH | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EVI | Arkansas | Arkansas Blue-Cross Blue-Shield |
| EVJ | - | Unallocated/Not Assigned |
| EVK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EVL | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EVM | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| EVN | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| EVO | California | Blue-Shield of California |
| EVP | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EVQ | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| EVR | California | Anthem Blue-Cross |
| EVS | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EVT | Vermont | Blue-Cross Blue-Shield of Vermont |
| EVU | - | Unallocated/Not Assigned |
| EVV | - | Unallocated/Not Assigned |
| EVW | - | Unallocated/Not Assigned |
| EVX | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EVY | - | Unallocated/Not Assigned |
| EVZ | - | Unallocated/Not Assigned |
| EWA | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EWB | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EWC | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EWD | - | Unallocated/Not Assigned |
| EWE | - | Unallocated/Not Assigned |
| EWF | New York | Empire Blue-Cross Blue-Shield of New York |
| EWG | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EWH | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EWI | - | Unallocated/Not Assigned |
| EWJ | California | Anthem Blue-Cross |
| EWK | - | Unallocated/Not Assigned |
| EWL | - | Unallocated/Not Assigned |
| EWM | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EWN | - | Unallocated/Not Assigned |
| EWO | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EWP | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| EWQ | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| EWR | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| EWS | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| EWT | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EWU | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| EWV | - | Unallocated/Not Assigned |
| EWW | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EWX | Arizona | Blue-Cross Blue-Shield of Arizona |
| EWY | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EWZ | California | Anthem Blue-Cross |
| EXA | Arkansas | Arkansas Blue-Cross Blue-Shield |
| EXB | - | Unallocated/Not Assigned |
| EXC | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EXD | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| EXE | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EXF | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| EXG | - | Unallocated/Not Assigned |
| EXH | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EXI | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EXJ | New York | Empire Blue-Cross Blue-Shield of New York |
| EXK | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EXL | New York | Empire Blue-Cross Blue-Shield of New York |
| EXM | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| EXN | Texas | Blue-Cross Blue-Shield of Texas |
| EXO | - | Unallocated/Not Assigned |
| EXP | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EXQ | California | Anthem Blue-Cross |
| EXR | - | Unallocated/Not Assigned |
| EXS | Illinois | Blue-Cross Blue-Shield of Illinois |
| EXT | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| EXU | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EXV | - | Unallocated/Not Assigned |
| EXW | - | Unallocated/Not Assigned |
| EXX | Arkansas | Arkansas Blue-Cross Blue-Shield |
| EXY | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EXZ | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| EYA | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| EYB | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EYC | - | Unallocated/Not Assigned |
| EYD | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| EYE | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EYF | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EYG | - | Unallocated/Not Assigned |
| EYH | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EYI | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EYJ | Florida | Florida-Blue |
| EYK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EYL | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| EYM | - | Unallocated/Not Assigned |
| EYN | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| EYO | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EYP | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| EYQ | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EYR | Illinois | Blue-Cross Blue-Shield of Illinois |
| EYS | - | Unallocated/Not Assigned |
| EYT | - | Unallocated/Not Assigned |
| EYU | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EYV | Idaho | Blue-Cross of Idaho |
| EYW | - | Unallocated/Not Assigned |
| EYX | - | Unallocated/Not Assigned |
| EYY | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| EYZ | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| EZA | Oklahoma | Blue-Cross Blue-Shield of Oklahoma |
| EZB | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| EZC | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| EZD | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| EZE | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| EZF | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| EZG | Texas | Blue-Cross Blue-Shield of Texas |
| EZH | - | Unallocated/Not Assigned |
| EZI | - | Unallocated/Not Assigned |
| EZJ | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EZK | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| EZL | - | Unallocated/Not Assigned |
| EZM | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| EZN | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| EZO | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| EZP | - | Unallocated/Not Assigned |
| EZQ | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EZR | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| EZS | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| EZT | California | Anthem Blue-Cross |
| EZU | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| EZV | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| EZW | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| EZX | - | Unallocated/Not Assigned |
| EZY | Alabama | Blue-Cross Blue-Shield of Alabama |
| EZZ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
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