Today you will find The BCBS Alpha Prefix List from OAA to OZZ. The alpha prefix is very important to the identification number. The prefix acts as a key element in confirming the members’ eligibility and coverage information. Prefixes are also used to identify and correctly route claims to the appropriate Blue Cross Blue Shield Plan for processing. Most members with coverage through a Blue Cross Blue Shield Plan are assigned a Three Letter alpha prefix as a part of their unique identification number. The alpha prefix can easily be identified as it is the first three characters.
| BCBS Prefix | State Lookup | BCBS Company |
|---|---|---|
| OAA | – | Unallocated/Not Assigned |
| OAB | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| OAC | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OAD | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OAE | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OAF | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OAG | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| OAH | New York | Empire Blue-Cross Blue-Shield of New York |
| OAI | California | Blue-Shield of California |
| OAJ | – | Unallocated/Not Assigned |
| OAK | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OAL | California | Blue-Shield of California |
| OAM | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OAN | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OAO | – | Unallocated/Not Assigned |
| OAP | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| OAQ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OAR | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OAS | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| OAT | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| OAU | Michigan | Blue-Cross Blue-Shield of Michigan |
| OAV | – | Unallocated/Not Assigned |
| OAW | – | Unallocated/Not Assigned |
| OAX | – | Unallocated/Not Assigned |
| OAY | – | Unallocated/Not Assigned |
| OAZ | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| OBA | California | Anthem Blue-Cross |
| OBB | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OBC | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| OBD | Florida | Florida-Blue |
| OBE | Michigan | Blue-Cross Blue-Shield of Michigan |
| OBF | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OBG | – | Unallocated/Not Assigned |
| OBH | – | Unallocated/Not Assigned |
| OBI | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| OBJ | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| OBK | – | Unallocated/Not Assigned |
| OBL | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OBM | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OBN | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| OBO | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OBP | California | Blue-Shield of California |
| OBQ | California | Anthem Blue-Cross |
| OBR | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OBS | – | Unallocated/Not Assigned |
| OBT | Arizona | Blue-Cross Blue-Shield of Arizona |
| OBU | Alabama | Blue-Cross Blue-Shield of Alabama |
| OBV | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| OBW | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OBX | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| OBY | – | Unallocated/Not Assigned |
| OBZ | – | Unallocated/Not Assigned |
| OCA | California | Anthem Blue-Cross |
| OCB | – | Unallocated/Not Assigned |
| OCC | – | Unallocated/Not Assigned |
| OCD | California | Blue-Shield of California |
| OCE | – | Unallocated/Not Assigned |
| OCF | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| OCG | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OCH | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OCI | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| OCJ | – | Unallocated/Not Assigned |
| OCK | Florida | Florida-Blue |
| OCL | – | Unallocated/Not Assigned |
| OCM | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OCN | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| OCO | California | Blue-Shield of California |
| OCP | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OCQ | – | Unallocated/Not Assigned |
| OCR | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OCS | – | Unallocated/Not Assigned |
| OCT | Idaho | Blue-Cross of Idaho |
| OCU | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OCV | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OCW | California | Anthem Blue-Cross |
| OCX | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OCY | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OCZ | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| ODA | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ODB | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ODC | – | Unallocated/Not Assigned |
| ODD | – | Unallocated/Not Assigned |
| ODE | – | Unallocated/Not Assigned |
| ODF | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| ODG | – | Unallocated/Not Assigned |
| ODH | – | Unallocated/Not Assigned |
| ODI | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| ODJ | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| ODK | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ODL | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| ODM | Arizona | Blue-Cross Blue-Shield of Arizona |
| ODN | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| ODO | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ODP | – | Unallocated/Not Assigned |
| ODQ | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| ODR | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ODS | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| ODT | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| ODU | – | Unallocated/Not Assigned |
| ODV | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| ODW | Michigan | Blue-Cross Blue-Shield of Michigan |
| ODX | Alabama | Blue-Cross Blue-Shield of Alabama |
| ODY | Michigan | Blue-Cross Blue-Shield of Michigan |
| ODZ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OEA | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OEB | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OEC | – | Unallocated/Not Assigned |
| OED | – | Unallocated/Not Assigned |
| OEE | Florida | Florida-Blue |
| OEF | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OEG | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| OEH | California | Anthem Blue-Cross |
| OEI | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| OEJ | California | Blue-Shield of California |
| OEK | Michigan | Blue-Cross Blue-Shield of Michigan |
| OEL | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OEM | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OEN | – | Unallocated/Not Assigned |
| OEO | – | Unallocated/Not Assigned |
| OEP | – | Unallocated/Not Assigned |
| OEQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OER | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| OES | California | Anthem Blue-Cross |
| OET | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OEU | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OEV | Pennsylvania | Highmark Blue-Shield of Pennsylvania |
| OEW | North Dakota | Blue-Cross Blue-Shield of North Dakota |
| OEX | – | Unallocated/Not Assigned |
| OEY | Michigan | Blue-Cross Blue-Shield of Michigan |
| OEZ | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| OFA | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| OFB | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| OFC | Michigan | Blue-Cross Blue-Shield of Michigan |
| OFD | – | Unallocated/Not Assigned |
| OFE | – | Unallocated/Not Assigned |
| OFF | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OFG | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| OFH | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OFI | – | Unallocated/Not Assigned |
| OFJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OFK | – | Unallocated/Not Assigned |
| OFL | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OFM | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OFN | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| OFO | California | Anthem Blue-Cross |
| OFP | California | Anthem Blue-Cross |
| OFQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OFR | – | Unallocated/Not Assigned |
| OFS | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OFT | California | Blue-Shield of California |
| OFU | Michigan | Blue-Cross Blue-Shield of Michigan |
| OFV | Michigan | Blue-Cross Blue-Shield of Michigan |
| OFW | Michigan | Blue-Cross Blue-Shield of Michigan |
| OFX | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| OFY | California | Blue-Shield of California |
| OFZ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OGA | – | Unallocated/Not Assigned |
| OGB | – | Unallocated/Not Assigned |
| OGC | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OGD | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OGE | – | Unallocated/Not Assigned |
| OGF | Michigan | Blue-Cross Blue-Shield of Michigan |
| OGG | – | Unallocated/Not Assigned |
| OGH | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| OGI | – | Unallocated/Not Assigned |
| OGJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OGK | Michigan | Blue-Cross Blue-Shield of Michigan |
| OGL | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OGM | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| OGN | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| OGO | Michigan | Blue-Cross Blue-Shield of Michigan |
| OGP | – | Unallocated/Not Assigned |
| OGQ | – | Unallocated/Not Assigned |
| OGR | – | Unallocated/Not Assigned |
| OGS BCBS Prefix | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| OGT | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OGU | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OGV | – | Unallocated/Not Assigned |
| OGW | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| OGX | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OGY | – | Unallocated/Not Assigned |
| OGZ | – | Unallocated/Not Assigned |
| OHA | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| OHB | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OHC | Michigan | Blue-Cross Blue-Shield of Michigan |
| OHD | Texas | Blue-Cross Blue-Shield of Texas |
| OHE | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| OHF | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OHG | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OHH | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| OHI | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| OHJ | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| OHK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OHL | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OHM | New York (Northeastern) | Blue-Shield of Northeastern New York |
| OHN | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OHO | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OHP | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OHQ | – | Unallocated/Not Assigned |
| OHR | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| OHS | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OHT | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OHU | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OHV | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| OHW | – | Unallocated/Not Assigned |
| OHX | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| OHY | Michigan | Blue-Cross Blue-Shield of Michigan |
| OHZ | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| OIA | – | Unallocated/Not Assigned |
| OIB | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OIC | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OID | Idaho | Blue-Cross of Idaho |
| OIE | – | Unallocated/Not Assigned |
| OIF | – | Unallocated/Not Assigned |
| OIG | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OIH | – | Unallocated/Not Assigned |
| OII | Michigan | Blue-Cross Blue-Shield of Michigan |
| OIJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OIK | Michigan | Blue-Cross Blue-Shield of Michigan |
| OIL | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OIM | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OIN | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OIO | Michigan | Blue-Cross Blue-Shield of Michigan |
| OIP | California | Blue-Shield of California |
| OIQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OIR | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OIS | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OIT | Michigan | Blue-Cross Blue-Shield of Michigan |
| OIU | Michigan | Blue-Cross Blue-Shield of Michigan |
| OIV | Michigan | Blue-Cross Blue-Shield of Michigan |
| OIW | Michigan | Blue-Cross Blue-Shield of Michigan |
| OIX | Michigan | Blue-Cross Blue-Shield of Michigan |
| OIY | Michigan | Blue-Cross Blue-Shield of Michigan |
| OIZ | California | Anthem Blue-Cross |
| OJA | – | Unallocated/Not Assigned |
| OJB | – | Unallocated/Not Assigned |
| OJC | – | Unallocated/Not Assigned |
| OJD | – | Unallocated/Not Assigned |
| OJE | Michigan | Blue-Cross Blue-Shield of Michigan |
| OJF | Michigan | Blue-Cross Blue-Shield of Michigan |
| OJG | – | Unallocated/Not Assigned |
| OJH | – | Unallocated/Not Assigned |
| OJI | Michigan | Blue-Cross Blue-Shield of Michigan |
| OJJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OJK | Michigan | Blue-Cross Blue-Shield of Michigan |
| OJL | Michigan | Blue-Cross Blue-Shield of Michigan |
| OJM | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| OJN | Michigan | Blue-Cross Blue-Shield of Michigan |
| OJO | Michigan | Blue-Cross Blue-Shield of Michigan |
| OJP | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| OJQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OJR | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OJS | – | Unallocated/Not Assigned |
| OJT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OJU | – | Unallocated/Not Assigned |
| OJV | Michigan | Blue-Cross Blue-Shield of Michigan |
| OJW | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| OJX | Michigan | Blue-Cross Blue-Shield of Michigan |
| OJY | Michigan | Blue-Cross Blue-Shield of Michigan |
| OJZ | – | Unallocated/Not Assigned |
| OKA | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| OKB | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OKC | Oklahoma | Blue-Cross Blue-Shield of Oklahoma |
| OKD | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OKE | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OKF | Michigan | Blue-Cross Blue-Shield of Michigan |
| OKG | Michigan | Blue-Cross Blue-Shield of Michigan |
| OKH | California | Anthem Blue-Cross |
| OKI | Michigan | Blue-Cross Blue-Shield of Michigan |
| OKJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OKK | Michigan | Blue-Cross Blue-Shield of Michigan |
| OKL | Arkansas | Arkansas Blue-Cross Blue-Shield |
| OKM | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OKN | Michigan | Blue-Cross Blue-Shield of Michigan |
| OKO | Michigan | Blue-Cross Blue-Shield of Michigan |
| OKP | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OKQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OKR | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| OKS | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OKT | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OKU | – | Unallocated/Not Assigned |
| OKV | Michigan | Blue-Cross Blue-Shield of Michigan |
| OKW | California | Anthem Blue-Cross |
| OKX | Michigan | Blue-Cross Blue-Shield of Michigan |
| OKY | Michigan | Blue-Cross Blue-Shield of Michigan |
| OKZ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OLA | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| OLB | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OLC | – | Unallocated/Not Assigned |
| OLD | California | Blue-Shield of California |
| OLE | – | Unallocated/Not Assigned |
| OLF | – | Unallocated/Not Assigned |
| OLG | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| OLH | Arizona | Blue-Cross Blue-Shield of Arizona |
| OLI | Michigan | Blue-Cross Blue-Shield of Michigan |
| OLJ | – | Unallocated/Not Assigned |
| OLK | – | Unallocated/Not Assigned |
| OLL | – | Unallocated/Not Assigned |
| OLM | Arkansas | Arkansas Blue-Cross Blue-Shield |
| OLN | Alabama | Blue-Cross Blue-Shield of Alabama |
| OLO | – | Unallocated/Not Assigned |
| OLP | – | Unallocated/Not Assigned |
| OLQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OLR | – | Unallocated/Not Assigned |
| OLS | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OLT | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OLU | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| OLV | Michigan | Blue-Cross Blue-Shield of Michigan |
| OLW | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OLX | Michigan | Blue-Cross Blue-Shield of Michigan |
| OLY | Michigan | Blue-Cross Blue-Shield of Michigan |
| OLZ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OMA | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OMB | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OMC | – | Unallocated/Not Assigned |
| OMD | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OME | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OMF | – | Unallocated/Not Assigned |
| OMG | Michigan | Blue-Cross Blue-Shield of Michigan |
| OMH | California | Blue-Shield of California |
| OMI | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| OMJ | – | Unallocated/Not Assigned |
| OMK | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| OML | Florida | Florida-Blue |
| OMM | – | Unallocated/Not Assigned |
| OMN | – | Unallocated/Not Assigned |
| OMO | – | Unallocated/Not Assigned |
| OMP | Michigan | Blue-Cross Blue-Shield of Michigan |
| OMQ | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| OMR | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| OMS | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| OMT | Michigan | Blue-Cross Blue-Shield of Michigan |
| OMU | – | Unallocated/Not Assigned |
| OMV | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OMW | – | Unallocated/Not Assigned |
| OMX | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| OMY | – | Unallocated/Not Assigned |
| OMZ | California | Blue-Shield of California |
| ONA | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| ONB | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ONC | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| OND | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| ONE | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| ONF | – | Unallocated/Not Assigned |
| ONG | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| ONH | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| ONI | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| ONJ | – | Unallocated/Not Assigned |
| ONK | – | Unallocated/Not Assigned |
| ONL | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ONM | – | Unallocated/Not Assigned |
| ONN | – | Unallocated/Not Assigned |
| ONO | California | Blue-Shield of California |
| ONP | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| ONQ | Alabama | Blue-Cross Blue-Shield of Alabama |
| ONR | – | Unallocated/Not Assigned |
| ONS | Alabama | Blue-Cross Blue-Shield of Alabama |
| ONT | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| ONU | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ONV | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| ONW | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| ONX | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| ONY | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| ONZ | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| OOA | California | Blue-Shield of California |
| OOB | California | Blue-Shield of California |
| OOC | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| OOD | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOE | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOF | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOG | California | Blue-Shield of California |
| OOH | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OOI | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOK | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOL | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| OOM | California | Anthem Blue-Cross |
| OON | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOO | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOP | California | Blue-Shield of California |
| OOQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOR | North Carolina | Blue-Cross Blue-Shield of North Carolina |
| OOS | California | Blue-Shield of California |
| OOT | California | Blue-Shield of California |
| OOU | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOV | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOW | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOX | Michigan | Blue-Cross Blue-Shield of Michigan |
| OOY | – | Unallocated/Not Assigned |
| OOZ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OPA | Louisiana | Blue-Cross Blue-Shield of Louisiana |
| OPB | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OPC | – | Unallocated/Not Assigned |
| OPD | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| OPE | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| OPF | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| OPG | California | Anthem Blue-Cross |
| OPH | – | Unallocated/Not Assigned |
| OPI | North Carolina | Blue-Cross of North Carolina |
| OPJ | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| OPK | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| OPL | – | Unallocated/Not Assigned |
| OPM | – | Unallocated/Not Assigned |
| OPN | – | Unallocated/Not Assigned |
| OPO | – | Unallocated/Not Assigned |
| OPP | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OPQ | – | Unallocated/Not Assigned |
| OPR | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OPS | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| OPT | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OPU | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| OPV | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| OPW | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| OPX | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| OPY | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OPZ | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| OQA | – | Unallocated/Not Assigned |
| OQB | California | Anthem Blue-Cross |
| OQC | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OQD | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQE | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQF | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQG | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQH | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQI | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQK | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQL | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQM | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQN | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQO | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQP | California | Anthem Blue-Cross |
| OQQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQR | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQS | California | Anthem Blue-Cross |
| OQT | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQU | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQV | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQW | Michigan | Blue-Cross Blue-Shield of Michigan |
| OQX | – | Unallocated/Not Assigned |
| OQY | – | Unallocated/Not Assigned |
| OQZ | – | Unallocated/Not Assigned |
| ORA | – | Unallocated/Not Assigned |
| ORB | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| ORC | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| ORD | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| ORE | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| ORF | Michigan | Blue-Cross Blue-Shield of Michigan |
| ORG | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| ORH | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| ORI | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| ORJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| ORK | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| ORL | California | Anthem Blue-Cross |
| ORM | New York (Northeastern) | Blue-Shield of Northeastern New York |
| ORN | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| ORO | Michigan | Blue-Cross Blue-Shield of Michigan |
| ORP | – | Unallocated/Not Assigned |
| ORQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| ORR | – | Unallocated/Not Assigned |
| ORS | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| ORT | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| ORU | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| ORV | Michigan | Blue-Cross Blue-Shield of Michigan |
| ORW | – | Unallocated/Not Assigned |
| ORX | Idaho | Blue-Cross of Idaho |
| ORY | California | Blue-Shield of California |
| ORZ | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| OSA | – | Unallocated/Not Assigned |
| OSB | Alabama | Blue-Cross Blue-Shield of Alabama |
| OSC | – | Unallocated/Not Assigned |
| OSD | – | Unallocated/Not Assigned |
| OSE | Arizona | Blue-Cross Blue-Shield of Arizona |
| OSF | – | Unallocated/Not Assigned |
| OSG | – | Unallocated/Not Assigned |
| OSH | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OSI | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OSJ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OSK | – | Unallocated/Not Assigned |
| OSL | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| OSM | Illinois | Blue-Cross Blue-Shield of Illinois |
| OSN | – | Unallocated/Not Assigned |
| OSO | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OSP | – | Unallocated/Not Assigned |
| OSQ | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| OSR | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OSS | California | Blue-Shield of California |
| OST | Delaware | Highmark Blue-Cross Blue-Shield of Delaware |
| OSU | – | Unallocated/Not Assigned |
| OSV | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OSW | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OSX | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OSY | Kansas City | Blue-Cross Blue-Shield of Kansas City |
| OSZ | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OTA | Florida | Florida-Blue |
| OTB | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OTC | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| OTD | California | Anthem Blue-Cross |
| OTE | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| OTF | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| OTG | Michigan | Blue-Cross Blue-Shield of Michigan |
| OTH | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| OTI | North Dakota | Blue-Cross Blue-Shield of North Dakota |
| OTJ | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OTK | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OTL | Alabama | Blue-Cross Blue-Shield of Alabama |
| OTM | California | Blue-Shield of California |
| OTN | North Dakota | Blue-Cross Blue-Shield of North Dakota |
| OTO BCBS Prefix | – | Unallocated/Not Assigned |
| OTP | California | Blue-Shield of California |
| OTQ | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| OTR | – | Unallocated/Not Assigned |
| OTS | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OTT | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OTU | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OTV | – | Unallocated/Not Assigned |
| OTW | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| OTX | California | Blue-Shield of California |
| OTY | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| OTZ | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OUA | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| OUB | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| OUC | South Carolina | Blue-Cross Blue-Shield of South Carolina |
| OUD | Michigan | Blue-Cross Blue-Shield of Michigan |
| OUE | Rhode Island | Blue-Cross Blue-Shield of Rhode Island |
| OUF | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| OUG | – | Unallocated/Not Assigned |
| OUH | New York | Empire Blue-Cross Blue-Shield of New York |
| OUI | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| OUJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OUK | Michigan | Blue-Cross Blue-Shield of Michigan |
| OUL | Michigan | Blue-Cross Blue-Shield of Michigan |
| OUM | Michigan | Blue-Cross Blue-Shield of Michigan |
| OUN | Michigan | Blue-Cross Blue-Shield of Michigan |
| OUO | Michigan | Blue-Cross Blue-Shield of Michigan |
| OUP | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OUQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OUR | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| OUS | – | Unallocated/Not Assigned |
| OUT | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| OUU | Michigan | Blue-Cross Blue-Shield of Michigan |
| OUV | Michigan | Blue-Cross Blue-Shield of Michigan |
| OUW | West Virginia | Highmark Blue-Cross Blue-Shield of West Virginia |
| OUX | Michigan | Blue-Cross Blue-Shield of Michigan |
| OUY | Michigan | Blue-Cross Blue-Shield of Michigan |
| OUZ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OVA | – | Unallocated/Not Assigned |
| OVB | – | Unallocated/Not Assigned |
| OVC | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OVD | Michigan | Blue-Cross Blue-Shield of Michigan |
| OVE | – | Unallocated/Not Assigned |
| OVF | – | Unallocated/Not Assigned |
| OVG | Michigan | Blue-Cross Blue-Shield of Michigan |
| OVH | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| OVI | Michigan | Blue-Cross Blue-Shield of Michigan |
| OVJ | – | Unallocated/Not Assigned |
| OVK | – | Unallocated/Not Assigned |
| OVL | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OVM | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OVN | Michigan | Blue-Cross Blue-Shield of Michigan |
| OVO | Michigan | Blue-Cross Blue-Shield of Michigan |
| OVP | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| OVQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OVR | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OVS | – | Unallocated/Not Assigned |
| OVT | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OVU | Michigan | Blue-Cross Blue-Shield of Michigan |
| OVV | Michigan | Blue-Cross Blue-Shield of Michigan |
| OVW | West Virginia | Highmark Blue-Cross Blue-Shield of West Virginia |
| OVX | Michigan | Blue-Cross Blue-Shield of Michigan |
| OVY | Michigan | Blue-Cross Blue-Shield of Michigan |
| OVZ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OWA | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OWB | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OWC | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| OWD | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| OWE | Florida | Florida-Blue |
| OWF | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OWG | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OWH | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| OWI | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OWJ | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OWK | Michigan | Blue-Cross Blue-Shield of Michigan |
| OWL | California | Blue-Shield of California |
| OWM | – | Unallocated/Not Assigned |
| OWN | – | Unallocated/Not Assigned |
| OWO | Michigan | Blue-Cross Blue-Shield of Michigan |
| OWP | – | Unallocated/Not Assigned |
| OWQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OWR | Michigan | Blue-Cross Blue-Shield of Michigan |
| OWS | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OWT | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| OWU | Michigan | Blue-Cross Blue-Shield of Michigan |
| OWV | – | Unallocated/Not Assigned |
| OWW | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OWX | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OWY | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OWZ | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OXA | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OXB | – | Unallocated/Not Assigned |
| OXC | – | Unallocated/Not Assigned |
| OXD | California | Anthem Blue-Cross |
| OXE | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXF | – | Unallocated/Not Assigned |
| OXG | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXH | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXI | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXK | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXL | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXM | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| OXN | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| OXO | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OXP | California | Anthem Blue-Cross |
| OXQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXR | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXS | – | Unallocated/Not Assigned |
| OXT | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXU | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXV | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXW | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXX | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXY | Michigan | Blue-Cross Blue-Shield of Michigan |
| OXZ | – | Unallocated/Not Assigned |
| OYA | South Dakota/Iowa | Wellmark Blue-Cross Blue-Shield |
| OYB | California | Anthem Blue-Cross |
| OYC | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| OYD | Idaho | Blue-Cross of Idaho |
| OYE | – | Unallocated/Not Assigned |
| OYF | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYG | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYH | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| OYI | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYK | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYL | California | Blue-Shield of California |
| OYM | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| OYN | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYO | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYP | – | Unallocated/Not Assigned |
| OYQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYR | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYS | California | Blue-Shield of California |
| OYT | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYU | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYV | – | Unallocated/Not Assigned |
| OYW | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYX | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYY | Michigan | Blue-Cross Blue-Shield of Michigan |
| OYZ | – | Unallocated/Not Assigned |
| OZA | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| OZB | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| OZC | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| OZD | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OZE | Michigan | Blue-Cross Blue-Shield of Michigan |
| OZF | Michigan | Blue-Cross Blue-Shield of Michigan |
| OZG | California | Blue-Shield of California |
| OZH | – | Unallocated/Not Assigned |
| OZI | Michigan | Blue-Cross Blue-Shield of Michigan |
| OZJ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OZK | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| OZL | Michigan | Blue-Cross Blue-Shield of Michigan |
| OZM | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| OZN | Michigan | Blue-Cross Blue-Shield of Michigan |
| OZO | – | Unallocated/Not Assigned |
| OZP | California | Anthem Blue-Cross |
| OZQ | Michigan | Blue-Cross Blue-Shield of Michigan |
| OZR | Michigan | Blue-Cross Blue-Shield of Michigan |
| OZS | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| OZT | Michigan | Blue-Cross Blue-Shield of Michigan |
| OZU | Michigan | Blue-Cross Blue-Shield of Michigan |
| OZV | Michigan | Blue-Cross Blue-Shield of Michigan |
| OZW | – | Unallocated/Not Assigned |
| OZX | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| OZY | Michigan | Blue-Cross Blue-Shield of Michigan |
| OZZ | Michigan | Blue-Cross Blue-Shield of Michigan |
Some identification cards may not include an alpha prefix, which may indicate that the claim filing instructions for these type policies are different. We suggest that you verify claim filing instructions during the time eligibility information is obtained. If not, please follow the instructions on the back of the member’s ID card or contact the plan directly. Member eligibility can be obtained at 1 (800) 676-BLUE (2583). Once connected, you will then simply provide the alpha prefix and the operator will then route you to the member’s plan. Helpful Tips Related to the Alpha Prefix:
- Do not omit or randomly select an alpha prefix.
- Do not substitute another Blue Cross Blue Shield Member’s prefix.
- Include the alpha prefix and all alpha characters preceding the alpha prefix on all correspondence and claims submitted to Blue Cross Blue Shield of Texas.
- The alpha prefix is always three letters followed by the member’s ID number which can be from 6 up to 14 characters total.
- If possible, make copies of the member’s ID card (front and back) for your records.
- We recommend that you obtain a copy of the ID card any time there has been a coverage or policy change. If there are no changes, we suggest that you obtain card copies annually.
About us
Billing Executive – a Medical Billing and Coding Knowledge Base for Physicians, Office staff, Medical Billers and Coders, including resources pertaining to HCPCS Codes, CPT Codes, ICD-10 billing codes, Modifiers, POS Codes, Revenue Codes, Billing Errors, Denials and Rejections.
Read More:
BCBS Alpha Prefix List – NAA to NZZ
BCBS Alpha Prefix List – DAA to DZZ
Medical Billing guide for Administration of Infusion
Tips to increase patient payments by follow-up
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