Prefixes from NAB to OZL
| NAB | BLUE ADVANTAGE ADMINS OF ARKANSAS |
| NAC | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NAD | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NAG | HEALTHNOW NEW YORK INC – BUFFALO |
| NAH | EMPIRE BCBS – NEW YORK |
| NAI | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| NAJ | EMPIRE BCBS – NEW YORK |
| NAK | CAREFIRST BCBS – MARYLAND |
| NAM | BLUE CROSS – IDAHO – BOISE |
| NAS | HEALTHCARE ADMINISTRATORS – SEATTLE |
| NAW | BCBS OF MICHIGAN |
| NAY | PREMERA BLUE CROSS – SEATTLE WA |
| NBB | REGENCE BLUE SHIELD – SEATTLE WA |
| NBC | BLUE CROSS BLUE SHIELD OF DELAWARE |
| NBE | BLUE CROSS AND BLUE SHIELD-ARIZONA |
| NBG | ANTHEM BLUE CROSS – CALIFORNIA |
| NBR | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NBS | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| NBT | EXCELLUS BCBS – ROCHESTER – NY |
| NBU | BCBS OF MICHIGAN |
| NBX | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| NBY | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NCB | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NCD | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NCF | ANTHEM BLUE CROSS – CALIFORNIA |
| NCH | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NCI | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NCK | BCBS – NORTH CAROLINA |
| NCO | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NCS | BLUE ADVANTAGE ADMINS OF ARKANSAS |
| NCW | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NCY | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NCZ | ANTHEM BCBS – MISSOURI |
| NDA | BCBS OF MICHIGAN |
| NDE | BCBS OF MICHIGAN |
| NDH | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| NDI | CAREFIRST BCBS – WASHINGTON DC |
| NDL | ANTHEM BLUE CROSS – CALIFORNIA |
| NDN | ANTHEM BCBS – OHIO |
| NDQ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NDR | HIGHMARK INC |
| NDT | ANTHEM BCBS – OHIO |
| NDU | ANTHEM BLUE CROSS – CALIFORNIA |
| NDV | ANTHEM BLUE CROSS – CALIFORNIA |
| NDW | ANTHEM BCBS – MISSOURI |
| NDX | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NDY | WELLMARK OF IOWA/SOUTH DAKOTA |
| NDZ | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| NEA | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NEC | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NEG | ANTHEM BLUE CROSS – CALIFORNIA |
| NEH | ANTHEM BCBS – OHIO |
| NEJ | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| NEL | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| NEM | BLUE CROSS BLUE SHIELD OF DELAWARE |
| NEN | ANTHEM BCBS – MISSOURI |
| NEQ | BCBS – SOUTH CAROLINA |
| NER | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NET | HEALTHCARE ADMINISTRATORS – SEATTLE |
| NEU | BCBS – MINNESOTA |
| NEW | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| NEZ | BCBS – SOUTH CAROLINA |
| NFA | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NFH | CAREFIRST ADMINISTRATORS |
| NFL | HEALTHNOW NEW YORK INC – BUFFALO |
| NFM | HIGHMARK INC |
| NFO | WELLMARK OF IOWA/SOUTH DAKOTA |
| NFV | CAREFIRST BCBS – MARYLAND |
| NFZ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NGC | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NGF | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NGG | BLUE SHIELD OF CALIFORNIA |
| NGJ | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NGK | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NGL | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NGM | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NGN | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NGO | ANTHEM BLUE CROSS – CALIFORNIA |
| NGV | ANTHEM BLUE CROSS – CALIFORNIA |
| NGW | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NGZ | WELLMARK OF IOWA/SOUTH DAKOTA |
| NHA | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NHB | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| NHC | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NHE | ANTHEM BLUE CROSS – CALIFORNIA |
| NHF | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| NHG | CAPITAL BLUE CROSS – HARRISBURG PA |
| NHH | BLUE SHIELD OF CALIFORNIA |
| NHJ | HIGHMARK INC |
| NHK | HIGHMARK INC |
| NHM | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NHN | ANTHEM BCBS – CONNECTICUT |
| NHP | ANTHEM BCBS – CONNECTICUT |
| NHT | BCBS OF MICHIGAN |
| NHU | BLUE CROSS AND BLUE SHIELD-ARIZONA |
| NHY | BLUE CROSS AND BLUE SHIELD-ARIZONA |
| NIB | ANTHEM BCBS – COLORADO |
| NIJ | ANTHEM BCBS – OHIO |
| NIK | ANTHEM BLUE CROSS – CALIFORNIA |
| NIQ | ANTHEM BCBS – OHIO |
| NIU | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NIW | ANTHEM BCBS – OHIO |
| NJB | HIGHMARK INC |
| NJF | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NJL | BCBS OF MICHIGAN |
| NJM | ANTHEM BLUE CROSS – CALIFORNIA |
| NJO | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NJQ | BCBS – SOUTH CAROLINA |
| NJT | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NJU | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NJX | HORIZON BCBS – NEW JERSEY |
| NJY | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NJZ | WELLMARK OF IOWA/SOUTH DAKOTA |
| NKA | BCBS – MINNESOTA |
| NKB | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NKC | ANTHEM BLUE CROSS – CALIFORNIA |
| NKD | BLUE SHIELD OF CALIFORNIA |
| NKE | ANTHEM BCBS – OHIO |
| NKJ | BCBS OF MICHIGAN |
| NKK | BCBS OF MICHIGAN |
| NKM | ANTHEM BLUE CROSS – CALIFORNIA |
| NKP | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NKQ | BCBS OF MICHIGAN |
| NKS | BCBS OF MICHIGAN |
| NKV | PREMERA BLUE CROSS – SEATTLE WA |
| NKW | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NKX | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NKZ | ANTHEM BCBS – OHIO |
| NLA | BCBS OF MICHIGAN |
| NLH | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NLI | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| NLJ | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| NLK | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NLL | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NLM | HIGHMARK INC |
| NLN | HIGHMARK INC |
| NLP | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| NLQ | PREMERA BLUE CROSS – SEATTLE WA |
| NLU | WELLMARK OF IOWA/SOUTH DAKOTA |
| NLV | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NLX | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NLZ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NMF | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NMG | BCBS – SOUTH CAROLINA |
| NMJ | NEW MEXICO BCBS |
| NMK | NEW MEXICO BCBS |
| NML | BCBS – SOUTH CAROLINA |
| NMM | NEW MEXICO BCBS |
| NMN | BCBS – MINNESOTA |
| NMX | ANTHEM BCBS – COLORADO |
| NNB | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NND | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NNF | HEALTHNOW NEW YORK INC – BUFFALO |
| NNH | ANTHEM BCBS – VIRGINIA |
| NNL | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NNO | EMPIRE BCBS – NEW YORK |
| NNP | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NNQ | PREMERA BLUE CROSS – SEATTLE WA |
| NNR | HIGHMARK INC |
| NNS | ANTHEM BCBS – VIRGINIA |
| NNS | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NNU | BLUE CROSS – N E PENNSYLVANIA |
| NNY | PREMERA BLUE CROSS – SEATTLE WA |
| NNZ | ANTHEM BCBS – VIRGINIA |
| NOE | BLUE SHIELD OF CALIFORNIA |
| NOI | ANTHEM BCBS – OHIO |
| NOJ | ANTHEM BLUE CROSS – CALIFORNIA |
| NOM | HIGHMARK INC |
| NON | HIGHMARK INC |
| NOS | ANTHEM BLUE CROSS – CALIFORNIA |
| NOT | ANTHEM BCBS – OHIO |
| NOW | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NOZ | BLUE CROSS – IDAHO – BOISE |
| NPC | BCBS – SOUTH CAROLINA |
| NPE | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NPI | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| NPJ | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| NPP | INDEPENDENCE BLUE CROSS |
| NPQ | BLUE CROSS – IDAHO – BOISE |
| NPT | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| NPU | BCBS – SOUTH CAROLINA |
| NPV | REGENCE BCBS – OREGON |
| NPX | BCBS – RHODE ISLAND |
| NQB | BLUE CROSS – IDAHO – BOISE |
| NQC | BLUE CROSS BLUE SHIELD OF DELAWARE |
| NQE | EXCELLUS BCBS – ROCHESTER – NY |
| NQF | ANTHEM BCBS – OHIO |
| NQG | ANTHEM BCBS – COLORADO |
| NQH | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NQK | BLUE CROSS – IDAHO – BOISE |
| NQM | ANTHEM BCBS – COLORADO |
| NQN | PREMERA BLUE CROSS – SEATTLE WA |
| NQP | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NQQ | BCBS – MINNESOTA |
| NQS | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NQX | ANTHEM BCBS – OHIO |
| NQY | ANTHEM BLUE CROSS – CALIFORNIA |
| NQZ | ANTHEM BCBS – OHIO |
| NRD | CAREFIRST BCBS – MARYLAND |
| NRK | BCBS – RHODE ISLAND |
| NRL | PREMERA BLUE CROSS – SEATTLE WA |
| NRM | CAREFIRST BCBS – MARYLAND |
| NRN | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NRP | CAREFIRST BCBS – MARYLAND |
| NRV | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NSA | ANTHEM BLUE CROSS – CALIFORNIA |
| NSC | ANTHEM BCBS – VIRGINIA |
| NSL | BLUE SHIELD OF CALIFORNIA |
| NSO | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NSR | ANTHEM BCBS – VIRGINIA |
| NSU | ANTHEM BCBS – OHIO |
| NTB | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NTF | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NTH | BCBS – SOUTH CAROLINA |
| NTI | WELLMARK OF IOWA/SOUTH DAKOTA |
| NTJ | BLUE CROSS – N E PENNSYLVANIA |
| NTL | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| NTM | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NTN | ANTHEM BLUE CROSS – CALIFORNIA |
| NTP | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NTQ | BLUE CROSS – N E PENNSYLVANIA |
| NTU | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| NUA | ANTHEM BCBS – OHIO |
| NUC | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NUE | BCBS – KANSAS CITY – MO |
| NUG | ANTHEM BCBS – OHIO |
| NUJ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NUK | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| NUL | ANTHEM BCBS – OHIO |
| NUO | BCBS OF MICHIGAN |
| NUQ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NUR | ANTHEM BCBS – OHIO |
| NUS | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NUU | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NUV | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NUY | ANTHEM BCBS – OHIO |
| NVA | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| NVE | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NVK | BCBS – MASSACHUSETTS |
| NVN | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| NVQ | PREMERA BLUE CROSS – SEATTLE WA |
| NVS | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| NVT | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NVW | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| NWB | PREMERA BLUE CROSS – SEATTLE WA |
| NWC | BCBS – SOUTH CAROLINA |
| NWE | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NWF | CAPITAL BLUE CROSS – HARRISBURG PA |
| NWG | ANTHEM BLUE CROSS – CALIFORNIA |
| NWL | BCBS – SOUTH CAROLINA |
| NWM | ANTHEM BCBS – OHIO |
| NWN | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NWO | ANTHEM BCBS – OHIO |
| NWR | ANTHEM BCBS – OHIO |
| NWU | BCBS – RHODE ISLAND |
| NXB | ANTHEM BCBS – OHIO |
| NXI | BLUE SHIELD OF CALIFORNIA |
| NXJ | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| NXM | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| NXQ | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NXR | ANTHEM BCBS – OHIO |
| NXT | BLUE SHIELD OF CALIFORNIA |
| NXU | ANTHEM BCBS – OHIO |
| NXV | WELLPOINT HEALTH NETWORKS – NEVADA |
| NXW | PREMERA BLUE CROSS – SEATTLE WA |
| NXX | PREMERA BLUE CROSS – SEATTLE WA |
| NXY | ANTHEM BCBS – OHIO |
| NXZ | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| NYC | EMPIRE BCBS – NEW YORK |
| NYE | EXCELLUS BCBS – SYRACUSE – NY |
| NYF | HEALTHNOW NEW YORK INC – ALBANY |
| NYG | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| NYH | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NYI | EMPIRE BCBS – NEW YORK |
| NYJ | BLUECROSS BLUESHIELD OF TENNESSEE |
| NYN | EMPIRE BCBS – NEW YORK |
| NYP | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NYQ | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| NYS | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NYT | EMPIRE BCBS – NEW YORK |
| NYU | ANTHEM BCBS – MISSOURI |
| NYX | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| NYY | EMPIRE BCBS – NEW YORK |
| NYZ | ANTHEM BLUE CROSS – CALIFORNIA |
| NZB | ANTHEM BCBS – OHIO |
| NZC | HEALTHNOW NEW YORK INC – BUFFALO |
| NZD | ANTHEM BCBS – MISSOURI |
| NZE | HEALTHCARE ADMINISTRATORS – SEATTLE |
| NZF | ANTHEM BCBS – MISSOURI |
| NZH | BCBS OF MICHIGAN |
| NZI | BLUE CROSS AND BLUE SHIELD-ARIZONA |
| NZJ | ANTHEM BLUE CROSS – CALIFORNIA |
| NZK | INDEPENDENCE BLUE CROSS |
| NZN | ANTHEM BCBS – OHIO |
| NZP | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NZQ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| NZR | ANTHEM BCBS – MISSOURI |
| NZV | WELLMARK OF IOWA/SOUTH DAKOTA |
| NZY | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| OAB | ANTHEM BLUE CROSS – CALIFORNIA |
| OAC | ANTHEM BCBS – OHIO |
| OAE | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| OAL | MOUNTAIN STATE BCBS – WV |
| OAM | HIGHMARK INC |
| OAP | BLUE SHIELD OF CALIFORNIA |
| OAY | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| OBA | ANTHEM BLUE CROSS – CALIFORNIA |
| OBD | EMPIRE BCBS – NEW YORK |
| OBF | HIGHMARK INC |
| OBL | CAREFIRST BCBS – WASHINGTON DC |
| OBN | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| OBT | PREMERA BLUE CROSS – SEATTLE WA |
| OCB | BCBS OF MICHIGAN |
| OCC | ANTHEM BLUE CROSS – CALIFORNIA |
| OCE | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| OCK | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| OCM | ANTHEM BCBS – OHIO |
| OCO | BLUE SHIELD OF CALIFORNIA |
| OCS | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| OCT | ANTHEM BLUE CROSS – CALIFORNIA |
| OCV | CAREFIRST BCBS – MARYLAND |
| OCW | ANTHEM BLUE CROSS – CALIFORNIA |
| OCY | CAREFIRST BCBS – MARYLAND |
| ODA | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| ODN | BCBS – SOUTH CAROLINA |
| ODP | ANTHEM BCBS – OHIO |
| ODR | CAREFIRST BCBS – MARYLAND |
| ODS | BCBS – SOUTH CAROLINA |
| OED | WELLMARK OF IOWA/SOUTH DAKOTA |
| OEF | CAREFIRST BCBS – MARYLAND |
| OEG | BCBS – KANSAS CITY – MO |
| OEL | CAREFIRST BCBS – MARYLAND |
| OEM | HIGHMARK INC |
| OET | CAREFIRST BCBS – MARYLAND |
| OEU | BCBS OF MICHIGAN |
| OEX | ANTHEM BLUE CROSS – CALIFORNIA |
| OGE | BLUE CROSS AND BLUE SHIELD-OKLAHOMA |
| OGL | WELLMARK OF IOWA/SOUTH DAKOTA |
| OHB | ANTHEM BCBS – OHIO |
| OHC | BCBS OF MICHIGAN |
| OHD | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| OHF | ANTHEM BCBS – VIRGINIA |
| OHM | ANTHEM BCBS – OHIO |
| OHP | ANTHEM BCBS – OHIO |
| OHR | ANTHEM BCBS – COLORADO |
| OIB | HIGHMARK INC |
| OIL | HIGHMARK INC |
| OKC | BLUE CROSS AND BLUE SHIELD-OKLAHOMA |
| OKL | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| OKN | BCBS OF MICHIGAN |
| OKP | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| OKU | BLUE ADVANTAGE ADMINS OF ARKANSAS |
| OKV | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| OKW | ANTHEM BLUE CROSS – CALIFORNIA |
| OKY | BCBS OF MICHIGAN |
| OLA | BCBS – KANSAS CITY – MO |
| OLC | ANTHEM BCBS – OHIO |
| OLD | ANTHEM BCBS – OHIO |
| OLE | ANTHEM BCBS – OHIO |
| OLF | ANTHEM BLUE CROSS – CALIFORNIA |
| OLK | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| OLL | CAREFIRST BCBS – MARYLAND |
| OLM | BLUE ADVANTAGE ADMINS OF ARKANSAS |
| OLN | ANTHEM BCBS – OHIO |
| OLS | CAREFIRST BCBS – MARYLAND |
| OLT | WELLMARK OF IOWA/SOUTH DAKOTA |
| OLU | ANTHEM BCBS – COLORADO |
| OLV | BCBS OF MICHIGAN |
| OMB | BCBS OF MICHIGAN |
| OMC | ANTHEM BCBS – OHIO |
| OMD | HIGHMARK INC |
| OME | WELLMARK OF IOWA/SOUTH DAKOTA |
| OMF | ANTHEM BLUE CROSS – CALIFORNIA |
| OMG | BCBS OF MICHIGAN |
| OMK | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| OMM | ANTHEM BLUE CROSS – CALIFORNIA |
| OMN | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| OMO | BLUE SHIELD OF CALIFORNIA |
| OMP | BCBS OF MICHIGAN |
| OMR | ANTHEM BCBS – OHIO |
| OMS | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| OMV | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| OMX | ANTHEM BCBS – OHIO |
| ONA | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| ONB | ANTHEM BCBS – OHIO |
| ONC | EXCELLUS BCBS – ROCHESTER – NY |
| ONE | BCBS – SOUTH CAROLINA |
| ONL | ANTHEM BCBS – OHIO |
| ONP | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| ONS | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| ONZ | EXCELLUS BCBS – ROCHESTER – NY |
| OOA | EMPIRE BCBS – NEW YORK |
| OOC | ANTHEM BLUE CROSS – CALIFORNIA |
| OPC | BLUE CROSS AND BLUE SHIELD-OKLAHOMA |
| OPD | BCBS OF MICHIGAN |
| OPF | BLUE CROSS – IDAHO – BOISE |
| OPG | ANTHEM BLUE CROSS – CALIFORNIA |
| OPH | CAREFIRST BCBS – MARYLAND |
| OPK | ANTHEM BCBS – OHIO |
| OPN | BCBS OF MICHIGAN |
| OPR | WELLMARK OF IOWA/SOUTH DAKOTA |
| OPW | ANTHEM BLUE CROSS – CALIFORNIA |
| OPX | BLUE ADVANTAGE ADMINS OF ARKANSAS |
| ORB | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| ORF | ANTHEM BCBS – MISSOURI |
| ORL | ANTHEM BLUE CROSS – CALIFORNIA |
| ORM | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| ORP | ANTHEM BLUE CROSS – CALIFORNIA |
| ORR | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| ORS | BLUE CROSS AND BLUE SHIELD-OKLAHOMA |
| ORU | BLUECROSS BLUESHIELD OF TENNESSEE |
| OSA | BLUE CROSS BLUE SHIELD OF DELAWARE |
| OSE | BLUE CROSS AND BLUE SHIELD-ARIZONA |
| OSF | ANTHEM BLUE CROSS – CALIFORNIA |
| OSG | ANTHEM BCBS – MISSOURI |
| OSH | CAREFIRST BCBS – MARYLAND |
| OSK | ANTHEM BLUE CROSS – CALIFORNIA |
| OSM | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| OSN | ANTHEM BCBS – OHIO |
| OSO | BLUE SHIELD OF CALIFORNIA |
| OSP | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| OSQ | HIGHMARK INC |
| OSR | BLUE SHIELD OF CALIFORNIA |
| OSS | BCBS – SOUTH CAROLINA |
| OSU | BLUE SHIELD OF CALIFORNIA |
| OSV | ANTHEM BCBS – OHIO |
| OSX | ARKANSAS BLUE CROSS AND BLUE SHIELD |
| OTA | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| OTD | ANTHEM BLUE CROSS – CALIFORNIA |
| OTG | BCBS OF MICHIGAN |
| OTI | BLUE SHIELD OF CALIFORNIA |
| OTL | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| OTS | ANTHEM BLUE CROSS – CALIFORNIA |
| OUH | ANTHEM BCBS – OHIO |
| OUH | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| OUN | BLUE SHIELD OF CALIFORNIA |
| OVA | BLUE SHIELD OF CALIFORNIA |
| OVE | ANTHEM BLUE CROSS – CALIFORNIA |
| OVH | PREMERA BLUE CROSS – SEATTLE WA |
| OVR | ANTHEM BLUE CROSS – CALIFORNIA |
| OVS | ANTHEM BCBS – OHIO |
| OWC | REGENCE BCBS – OREGON |
| OWE | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| OWK | ANTHEM BCBS – OHIO |
| OWL | ANTHEM BLUE CROSS – CALIFORNIA |
| OWR | ANTHEM BCBS – OHIO |
| OWS | ANTHEM BLUE CROSS – CALIFORNIA |
| OWZ | WELLMARK OF IOWA/SOUTH DAKOTA |
| OXC | PREMERA BLUE CROSS – SEATTLE WA |
| OXE | EMPIRE BCBS – NEW YORK |
| OXO | HEALTHNOW NEW YORK INC – BUFFALO |
| OXP | ANTHEM BLUE CROSS – CALIFORNIA |
| OXS | BLUE SHIELD OF CALIFORNIA |
| OXT | ANTHEM BLUE CROSS – CALIFORNIA |
| OXX | EMPIRE BCBS – NEW YORK |
| OXY | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| OYM | REGENCE BLUE SHIELD – SEATTLE WA |
| OYZ | BLUECROSS BLUESHIELD OF TENNESSEE |
| OZL | BLUE CROSS BLUE SHIELD OF MICHIGAN |
