Prefixes from BAA to BZZ
| BAA | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BAB | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BAF | BLUE CROSS AND BLUE SHIELD-OKLAHOMA |
| BAG | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BAI | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BAK | ANTHEM BCBS – MISSOURI |
| BAM | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BAQ | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BAT | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| BAU | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BAV | ANTHEM BCBS – VIRGINIA |
| BAW | EMPIRE BCBS – NEW YORK |
| BAY | ANTHEM BLUE CROSS – CALIFORNIA |
| BBA | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BBB | CAPITAL BLUE CROSS – HARRISBURG PA |
| BBC | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BBE | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BBH | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BBI | INDEPENDENCE BLUE CROSS |
| BBJ | PREMERA BLUE CROSS – SEATTLE WA |
| BBL | ANTHEM BLUE CROSS – CALIFORNIA |
| BBM | HIGHMARK INC |
| BBP | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| BBR | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BBS | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BBT | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BBU | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BBW | BCBS – MINNESOTA |
| BCB | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BCI | ANTHEM BLUE CROSS – CALIFORNIA |
| BCL | ANTHEM BLUE CROSS – CALIFORNIA |
| BCM | HIGHMARK INC |
| BCN | REGENCE BLUE SHIELD – SEATTLE WA |
| BCO | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BCS | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BCW | REGENCE BLUE SHIELD – SEATTLE WA |
| BDC | BCBS OF MICHIGAN |
| BDD | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BDG | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BDJ | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| BDL | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BDM | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BDO | ANTHEM BCBS – OHIO |
| BDP | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BDQ | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| BDR | BLUE ADVANTAGE ADMINS OF ARKANSAS |
| BDT | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BDU | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BDV | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| BDY | ANTHEM BCBS – OHIO |
| BEB | BCBS – KANSAS CITY – MO |
| BEC | BCBS OF MICHIGAN |
| BEF | BCBS OF MICHIGAN |
| BEG | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BEI | BCBS OF MICHIGAN |
| BEJ | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| BEO | ANTHEM BLUE CROSS – CALIFORNIA |
| BER | ANTHEM BCBS – OHIO |
| BES | EXCELLUS BCBS – ROCHESTER – NY |
| BEU | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| BEV | ANTHEM BLUE CROSS – CALIFORNIA |
| BFB | BCBS – LOUISIANA |
| BFC | ANTHEM BCBS – OHIO |
| BFD | ANTHEM BCBS – OHIO |
| BFE | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BFF | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BFG | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| BFK | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BFL | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| BFM | HIGHMARK INC |
| BFO | BCBS OF MICHIGAN |
| BFP | CAREFIRST BCBS – MARYLAND |
| BFQ | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| BFS | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| BFU | ANTHEM BCBS – VIRGINIA |
| BFZ | HEALTHNOW NEW YORK INC – BUFFALO |
| BGC | BCBS OF MICHIGAN |
| BGF | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BGH | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BGI | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BGJ | BLUE SHIELD OF CALIFORNIA |
| BGM | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BGN | EXCELLUS BCBS – ROCHESTER – NY |
| BGO | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BGP | BCBS OF MICHIGAN |
| BGQ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BGT | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BGU | ANTHEM BCBS – VIRGINIA |
| BGX | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BGZ | ANTHEM BCBS – OHIO |
| BHE | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| BHG | WELLMARK OF IOWA/SOUTH DAKOTA |
| BHI | HIGHMARK INC |
| BHM | HIGHMARK INC |
| BHN | HIGHMARK INC |
| BHO | EMPIRE BCBS – NEW YORK |
| BHQ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BHS | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BHT | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| BHU | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| BHW | CAPITAL BLUE CROSS – HARRISBURG PA |
| BHX | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BHY | EMPIRE BCBS – NEW YORK |
| BIA | ANTHEM BCBS – OHIO |
| BIC | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BIE | BCBS OF MICHIGAN |
| BIH | WELLPOINT HEALTH NETWORKS – INDIANA |
| BIL | BCBS – SOUTH CAROLINA |
| BIM | BCBS OF MICHIGAN |
| BIU | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BIW | WELLPOINT HEALTH NETWORKS – INDIANA |
| BIX | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BJA | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| BJB | EMPIRE BCBS – NEW YORK |
| BJD | ANTHEM BCBS – OHIO |
| BJE | ANTHEM BLUE CROSS – CALIFORNIA |
| BJF | EMPIRE BCBS – NEW YORK |
| BJG | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BJH | WELLMARK OF IOWA/SOUTH DAKOTA |
| BJI | BCBS – SOUTH CAROLINA |
| BJJ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BJN | HIGHMARK INC |
| BJP | BCBS – MINNESOTA |
| BJQ | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BJS | ANTHEM BLUE CROSS – CALIFORNIA |
| BJT | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BJU | HEALTHCARE ADMINISTRATORS – SEATTLE |
| BJX | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| BJY | EMPIRE BCBS – NEW YORK |
| BJZ | WELLPOINT HEALTH NETWORKS – NEVADA |
| BKA | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BKC | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BKD | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BKH | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BKI | ANTHEM BLUE CROSS – CALIFORNIA |
| BKJ | EMPIRE BCBS – NEW YORK |
| BKK | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BKL | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BKN | ANTHEM BCBS – OHIO |
| BKO | ANTHEM BCBS – OHIO |
| BKP | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BKQ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BKR | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BKS | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BKU | WELLMARK OF IOWA/SOUTH DAKOTA |
| BKV | WELLMARK OF IOWA/SOUTH DAKOTA |
| BKW | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BKY | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BKZ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BLB | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BLC | HEALTHNOW NEW YORK INC – BUFFALO |
| BLE | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BLF | CAREFIRST BCBS – MARYLAND |
| BLG | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| BLI | BCBS – SOUTH CAROLINA |
| BLM | EMPIRE BCBS – NEW YORK |
| BLO | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BLQ | ANTHEM BCBS – OHIO |
| BLR | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BLS | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BLU | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BLV | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BLW | HEALTHNOW NEW YORK INC – BUFFALO |
| BLX | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BLZ | BCBS – RHODE ISLAND |
| BMC | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BMD | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BMJ | ANTHEM BCBS – MISSOURI |
| BML | BCBS OF MICHIGAN |
| BMO | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BMQ | BCBS – KANSAS CITY – MO |
| BMR | CAREFIRST BCBS – MARYLAND |
| BNC | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BNF | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BNI | HIGHMARK INC |
| BNJ | ANTHEM BCBS – OHIO |
| BNL | CAREFIRST ADMINISTRATORS |
| BNP | WELLMARK OF IOWA/SOUTH DAKOTA |
| BNR | HIGHMARK INC |
| BNT | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BNY | EMPIRE BCBS – NEW YORK |
| BOA | BCBS – SOUTH CAROLINA |
| BOB | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| BOG | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BOH | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BOI | WELLMARK OF IOWA/SOUTH DAKOTA |
| BOK | BLUE CROSS AND BLUE SHIELD-OKLAHOMA |
| BOL | WELLMARK OF IOWA/SOUTH DAKOTA |
| BOP | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BOU | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BOV | HIGHMARK INC |
| BOY | ANTHEM BCBS – MISSOURI |
| BPA | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BPB | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BPD | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BPE | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BPF | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BPI | WELLMARK OF IOWA/SOUTH DAKOTA |
| BPJ | ANTHEM BCBS – MISSOURI |
| BPM | EXCELLUS BCBS – ROCHESTER – NY |
| BPO | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BPT | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BPU | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BPZ | CAREFIRST BCBS – MARYLAND |
| BQA | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BQB | HEALTHCARE ADMINISTRATORS – SEATTLE |
| BQC | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BQG | BCBS OF MICHIGAN |
| BQI | ANTHEM BCBS – VIRGINIA |
| BQK | WELLMARK OF IOWA/SOUTH DAKOTA |
| BQL | ANTHEM BCBS – OHIO |
| BQM | ANTHEM BCBS – OHIO |
| BQN | ANTHEM BLUE CROSS – CALIFORNIA |
| BQO | BCBS – NORTH CAROLINA |
| BQP | ANTHEM BCBS – MISSOURI |
| BQQ | HEALTHNOW NEW YORK INC – BUFFALO |
| BQR | ANTHEM BCBS – OHIO |
| BQT | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BQU | ANTHEM BCBS – OHIO |
| BQV | WELLMARK OF IOWA/SOUTH DAKOTA |
| BQW | BCBS OF MICHIGAN |
| BQX | BLUE CROSS – IDAHO – BOISE |
| BQX | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BQY | BLUE SHIELD OF CALIFORNIA |
| BRB | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BRC | BLUE SHIELD OF CALIFORNIA |
| BRD | INDEPENDENCE BLUE CROSS |
| BRF | BCBS – MINNESOTA |
| BRI | ANTHEM BCBS – OHIO |
| BRJ | EXCELLUS BCBS – ROCHESTER – NY |
| BRL | ANTHEM BCBS – OHIO |
| BRQ | BLUE CROSS AND BLUE SHIELD-OKLAHOMA |
| BRS | WELLMARK OF IOWA/SOUTH DAKOTA |
| BRT | ANTHEM BCBS – OHIO |
| BRV | BCBS OF MICHIGAN |
| BRW | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BRX | ANTHEM BLUE CROSS – CALIFORNIA |
| BRY | BLUE SHIELD OF CALIFORNIA |
| BSC | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BSE | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| BSG | ANTHEM BCBS – VIRGINIA |
| BSH | ANTHEM BLUE CROSS – CALIFORNIA |
| BSI | BCBS OF MICHIGAN |
| BSJ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BSL | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BSM | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BSP | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BSQ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BSS | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BST | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BTC | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BTJ | ANTHEM BCBS – OHIO |
| BTK | ANTHEM BCBS – OHIO |
| BTN | BLUE CROSS – IDAHO – BOISE |
| BTO | BLUE SHIELD OF CALIFORNIA |
| BTP | EMPIRE BCBS – NEW YORK |
| BTQ | HEALTHCARE ADMINISTRATORS – SEATTLE |
| BTR | COMPREHENSIVE CARE SERVICES INC-MN |
| BTS | WELLMARK OF IOWA/SOUTH DAKOTA |
| BTV | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BTW | ANTHEM BLUE CROSS – CALIFORNIA |
| BTY | EMPIRE BCBS – NEW YORK |
| BUD | BCBS OF MICHIGAN |
| BUE | ANTHEM BCBS – OHIO |
| BUH | HIGHMARK INC |
| BUJ | BLUE CROSS BLUE SHIELD OF DELAWARE |
| BUK | ANTHEM BCBS – OHIO |
| BUM | BLUE SHIELD OF CALIFORNIA |
| BUO | HIGHMARK INC |
| BUQ | BCBS – SOUTH CAROLINA |
| BUT | CAREFIRST BCBS – MARYLAND |
| BUU | BCBS – NORTH CAROLINA |
| BUW | WELLMARK OF IOWA/SOUTH DAKOTA |
| BUY | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BVA | ANTHEM BCBS – VIRGINIA |
| BVB | HIGHMARK INC |
| BVC | CAREFIRST BCBS – MARYLAND |
| BVE | PREMERA BLUE CROSS – SEATTLE WA |
| BVF | WELLMARK OF IOWA/SOUTH DAKOTA |
| BVH | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BVI | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BVK | ANTHEM BCBS – OHIO |
| BVO | BLUE CROSS – IDAHO – BOISE |
| BVR | PREMERA BLUE CROSS – SEATTLE WA |
| BVS | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BVT | HEALTHNOW NEW YORK INC – BUFFALO |
| BVU | ANTHEM BCBS – OHIO |
| BVX | ANTHEM BCBS – OHIO |
| BVY | EMPIRE BCBS – NEW YORK |
| BWA | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BWC | BLUE CROSS AND BLUE SHIELD OF TEXAS |
| BWF | BCBS – SOUTH CAROLINA |
| BWH | WELLMARK OF IOWA/SOUTH DAKOTA |
| BWK | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BWL | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BWN | BCBS OF MICHIGAN |
| BWP | ANTHEM BCBS – OHIO |
| BWR | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BWU | BCBS – RHODE ISLAND |
| BWV | ANTHEM BCBS – OHIO |
| BWW | INDEPENDENCE BLUE CROSS |
| BWX | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BWY | ANTHEM BCBS – OHIO |
| BWZ | ANTHEM BLUE CROSS – CALIFORNIA |
| BXC | ANTHEM BLUE CROSS – CALIFORNIA |
| BXD | ANTHEM BCBS – MISSOURI |
| BXE | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BXF | ANTHEM BCBS – OHIO |
| BXG | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BXH | ANTHEM BCBS – OHIO |
| BXK | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BXL | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BXN | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| BXO | CAREFIRST BCBS – WASHINGTON DC |
| BXP | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BXQ | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BXR | ANTHEM BCBS – OHIO |
| BXS | ANTHEM BLUE CROSS – CALIFORNIA |
| BXT | COMPREHENSIVE CARE SERVICES INC-MN |
| BXU | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BXV | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BXX | BLUE CROSS AND BLUE SHIELD-ILLINOIS |
| BXY | CAREFIRST BCBS – MARYLAND |
| BXZ | ANTHEM BCBS – OHIO |
| BYB | ANTHEM BCBS – OHIO |
| BYC | ANTHEM BCBS – OHIO |
| BYD | BLUE CROSS AND BLUE SHIELD-ALABAMA |
| BYE | BCBS – SOUTH CAROLINA |
| BYG | CAREFIRST BCBS – MARYLAND |
| BYH | BLUE CROSS AND BLUE SHIELD-GEORGIA |
| BYJ | ANTHEM BLUE CROSS – CALIFORNIA |
| BYJ | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BYL | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BYP | ANTHEM BCBS – OHIO |
| BYQ | EMPIRE BCBS – NEW YORK |
| BYT | BLUE CROSS BLUE SHIELD OF MICHIGAN |
| BYU | EMPIRE BCBS – NEW YORK |
| BYV | EMPIRE BCBS – NEW YORK |
| BYX | EMPIRE BCBS – NEW YORK |
| BYY | ANTHEM BCBS – OHIO |
| BYZ | ANTHEM BCBS – OHIO |
| BZB | PREMERA BLUE CROSS – SEATTLE WA |
| BZE | BLUE SHIELD OF CALIFORNIA |
| BZF | HIGHMARK INC |
| BZH | BCBS OF MICHIGAN |
| BZI | HIGHMARK INC |
| BZJ | BLUE CROSS – IDAHO – BOISE |
| BZK | PREMERA BLUE CROSS – SEATTLE WA |
| BZM | ANTHEM BCBS – OHIO |
| BZN | WELLPOINT HEALTH NETWORKS-WISCONSIN |
| BZP | WELLPOINT HEALTH NETWORKS-WISCONSIN |
| BZQ | BLUE CROSS AND BLUE SHIELD-FLORIDA |
| BZR | HIGHMARK INC |
| BZT | BLUE SHIELD OF CALIFORNIA |
| BZU | BCBS OF MICHIGAN |
| BZX | WELLMARK OF IOWA/SOUTH DAKOTA |
| BZY | ANTHEM BLUE CROSS – CALIFORNIA |
| BZZ | BCBS – NORTH CAROLINA |
