BCBS Prefix BAA-BZZ is updated as per latest information collected from authorized sources.
| BCBS Prefix | BCBS Plan Name | State |
|---|---|---|
| BAA | Anthem BCBS of Ohio | Ohio |
| BAB | Anthem BCBS of Connecticut | Connecticut |
| BAC | Carefirst Administrators | N/A |
| BAD | BCBS of Kansas City | Kansas City |
| BAE | Empire BCBS of New York | New York |
| BAF | BCBS of Oklahoma | Oklahoma |
| BAG | BCBS of Alabama | Alabama |
| BAH | BCBS of Massachusetts | Massachusetts |
| BAI | No Prefix Assigned | N/A |
| BAJ | Wellmark BCBS | N/A |
| BAK | Anthem BCBS of Missouri | Missouri |
| BAL | BCBS of North Dakota | Dakota |
| BAM | BCBS of Illinois | Illinois |
| BAN | Carefirst BCBS of Maryland | Maryland |
| BAO | Wellmark BCBS | N/A |
| BAP | BCBS of Illinois | Illinois |
| BAQ | BCBS of Alabama | Alabama |
| BAR | Carefirst BCBS of Maryland | Maryland |
| BAS | BCBS of Texas | Texas |
| BAT | BCBS of South Carolina | South Carolina |
| BAU | Anthem BCBS of Missouri | Missouri |
| BAV | Anthem BCBS of Maine | Maine |
| BAW | Anthem Blue Cross of California | California |
| BAX | Horizon BCBS of New Jersey | Jersey |
| BAY | Anthem Blue Cross of California | California |
| BAZ | BCBS of Texas | Texas |
| BBA | BCBS of South Carolina | South Carolina |
| BBB | Horizon BCBS of New Jersey | Jersey |
| BBC | Premera Blue Cross | Cross |
| BBD | BCBS of Illinois | Illinois |
| BBE | BCBS of Illinois | Illinois |
| BBF | No Prefix Assigned | N/A |
| BBG | BCBS of Texas | Texas |
| BBH | Anthem BCBS of Connecticut | Connecticut |
| BBI | BCBS of Michigan | Michigan |
| BBJ | Premera Blue Cross | Cross |
| BBK | Anthem Blue Cross of California | California |
| BBL | Anthem Blue Cross of California | California |
| BBM | Highmark BCBS | N/A |
| BBN | Highmark BCBS | N/A |
| BBO | Carefirst BCBS | N/A |
| BBP | BCBS of Massachusetts | Massachusetts |
| BBQ | BCBS of Alabama | Alabama |
| BBR | BCBS of Illinois | Illinois |
| BBS | BCBS of Alabama | Alabama |
| BBT | BCBS of South Carolina | South Carolina |
| BBU | BCBS of Illinois | Illinois |
| BBV | Anthem BCBS of Missouri | Missouri |
| BBW | Anthem Blue Cross of California | California |
| BBX | Horizon BCBS of New Jersey | Jersey |
| BBY | BCBS of Michigan | Michigan |
| BBZ | BCBS of Illinois | Illinois |
| BCA | No Prefix Assigned | N/A |
| BCB | BCBS of Illinois | Illinois |
| BCC | Premera Blue Cross | Cross |
| BCD | BCBS of Illinois | Illinois |
| BCE | Premera Blue Cross | Cross |
| BCF | Wellmark BCBS | N/A |
| BCG | BCBS of Texas | Texas |
| BCH | BCBS of Montana | Montana |
| BCI | BCBS of Massachusetts | Massachusetts |
| BCJ | Anthem BCBS of Ohio | Ohio |
| BCK | Anthem BCBS of Ohio | Ohio |
| BCL | Anthem Blue Cross of California | California |
| BCM | Highmark BCBS | N/A |
| BCN | Anthem BCBS of Ohio | Ohio |
| BCO | Wellmark BCBS | N/A |
| BCP | Blue Cross of California | California |
| BCQ | BCBS of Arkansas | Arkansas |
| BCR | Wellmark BCBS | N/A |
| BCS | BCBS of Illinois | Illinois |
| BCT | Regence BCBS of Utah | Utah |
| BCU | BCBS of Illinois | Illinois |
| BCV | Blue Shield of California | California |
| BCW | Empire BCBS of New York | New York |
| BCX | BCBS of Illinois | Illinois |
| BCY | BCBS of Florida | Florida |
| BCZ | No Prefix Assigned | N/A |
| BDA | BCBS of Michigan | Michigan |
| BDB | BCBS of Arkansas Blue Advantage | N/A |
| BDC | BCBS of Michigan | Michigan |
| BDD | Anthem BCBS of Maine | Maine |
| BDE | Anthem Blue Cross of California | California |
| BDF | BCBS of Kansas City | Kansas City |
| BDG | BCBS of Illinois | Illinois |
| BDH | Wellmark BCBS | N/A |
| BDI | Wellmark BCBS | N/A |
| BDJ | BCBS of Georgia | Georgia |
| BDK | Carefirst BCBS of Maryland | Maryland |
| BDL | BCBS of Illinois | Illinois |
| BDM | BCBS of Alabama | Alabama |
| BDN | Carefirst Administrators | N/A |
| BDO | Anthem BCBS of Ohio | Ohio |
| BDP | Anthem BCBS of Ohio | Ohio |
| BDQ | No Prefix Assigned | N/A |
| BDR | BCBS of Arkansas Blue Advantage | N/A |
| BDS | BCBS of Michigan | Michigan |
| BDT | Anthem BCBS of Ohio | Ohio |
| BDU | BCBS of Tennessee | Tennessee |
| BDV | BCBS of Georgia | Georgia |
| BDW | Horizon BCBS of New Jersey | Jersey |
| BDX | No Prefix Assigned | N/A |
| BDY | Anthem BCBS of Ohio | Ohio |
| BDZ | Carefirst Administrators | N/A |
| BEA | BCBS of Florida | Florida |
| BEB | BCBS of Kansas City | Kansas City |
| BEC | BCBS of Michigan | Michigan |
| BED | Blue Cross of Idaho | Idaho |
| BEE | BCBS of Michigan | Michigan |
| BEF | BCBS of Michigan | Michigan |
| BEG | BCBS of Alabama | Alabama |
| BEH | Anthem BCBS of Ohio | Ohio |
| BEI | BCBS of Michigan | Michigan |
| BEJ | BCBS of Texas | Texas |
| BEK | Carefirst BCBS of Maryland | Maryland |
| BEL | Premera Blue Cross | Cross |
| BEM | BCBS of Illinois | Illinois |
| BEN | Anthem BCBS of Ohio | Ohio |
| BEO | Horizon BCBS of New Jersey | Jersey |
| BEP | Carefirst BCBS of Maryland | Maryland |
| BEQ | Blue Shield of California | California |
| BER | BCBS of Massachusetts | Massachusetts |
| BES | Anthem BCBS of Ohio | Ohio |
| BET | Highmark BCBS | N/A |
| BEU | BCBS of Florida | Florida |
| BEV | Anthem BCBS of Ohio | Ohio |
| BEW | Horizon BCBS of New Jersey | Jersey |
| BEX | No Prefix Assigned | N/A |
| BEY | Anthem BCBS of Maine | Maine |
| BEZ | Wellmark BCBS | N/A |
| BFA | BCBS of Minnesota | Minnesota |
| BFB | BCBS of Louisiana | Louisiana |
| BFC | Anthem BCBS of Ohio | Ohio |
| BFD | Anthem BCBS of Kentucky | Kentucky |
| BFE | BCBS of Tennessee | Tennessee |
| BFF | BCBS of Tennessee | Tennessee |
| BFG | BCBS of Texas | Texas |
| BFH | Carefirst BCBS of Maryland | Maryland |
| BFI | BCBS of Western New York | New York |
| BFJ | Anthem BCBS of Virginia | Virginia |
| BFK | Anthem BCBS of Ohio | Ohio |
| BFL | BCBS of Florida | Florida |
| BFM | Highmark BCBS | N/A |
| BFN | Wellmark BCBS | N/A |
| BFO | BCBS of Michigan | Michigan |
| BFP | BCBS of North Carolina | South Carolina |
| BFQ | BCBS of Texas | Texas |
| BFR | BCBS of South Carolina | South Carolina |
| BFS | BCBS of Texas | Texas |
| BFT | No Prefix Assigned | N/A |
| BFU | Carefirst BCBS | N/A |
| BFV | Horizon BCBS of New Jersey | Jersey |
| BFW | BCBS of Western New York | New York |
| BFX | Anthem BCBS of Indiana | Indiana |
| BFY | Carefirst BCBS | N/A |
| BFZ | BCBS of Western New York | New York |
| BGA | BCBS of Massachusetts | Massachusetts |
| BGB | BCBS of Michigan | Michigan |
| BGC | BCBS of Michigan | Michigan |
| BGD | BCBS of Massachusetts | Massachusetts |
| BGE | Premera Blue Cross | Cross |
| BGF | Carefirst Administrators | N/A |
| BGG | Anthem BCBS of Missouri | Missouri |
| BGH | BCBS of Illinois | Illinois |
| BGI | BCBS of Alabama | Alabama |
| BGJ | Blue Shield of California | California |
| BGK | Carefirst BCBS | N/A |
| BGL | BCBS of Alabama | Alabama |
| BGM | Anthem Blue Cross of California | California |
| BGN | BCBS of Kansas City | Kansas City |
| BGO | BCBS of Florida | Florida |
| BGP | BCBS of Michigan | Michigan |
| BGQ | Carefirst BCBS of Maryland | Maryland |
| BGR | BCBS of Illinois | Illinois |
| BGS | Premera Blue Cross | Cross |
| BGT | BCBS of Alabama | Alabama |
| BGU | Anthem BCBS of Virginia | Virginia |
| BGV | No Prefix Assigned | N/A |
| BGW | Anthem BCBS of Virginia | Virginia |
| BGX | BCBS of Alabama | Alabama |
| BGY | Capital Blue Cross | Cross |
| BGZ | Anthem BCBS of Wisconsin | Wisconsin |
| BHA | BCBS of Kansas City | Kansas City |
| BHB | Capital Blue Cross | Cross |
| BHC | No Prefix Assigned | N/A |
| BHD | No Prefix Assigned | N/A |
| BHE | BCBS of Texas | Texas |
| BHF | BCBS of Massachusetts | Massachusetts |
| BHG | Wellmark BCBS | N/A |
| BHH | BCBS of Minnesota | Minnesota |
| BHI | Highmark BCBS | N/A |
| BHJ | BCBS of Texas | Texas |
| BHK | Anthem BCBS of Maine | Maine |
| BHL | BCBS of Nebraska | Nebraska |
| BHM | BCBS of Michigan | Michigan |
| BHN | No Prefix Assigned | N/A |
| BHO | Wellmark BCBS | N/A |
| BHP | BCBS of Illinois | Illinois |
| BHQ | Anthem BCBS of Georgia | Georgia |
| BHR | Anthem BCBS of Connecticut | Connecticut |
| BHS | BCBS of Alabama | Alabama |
| BHT | BCBS of Massachusetts | Massachusetts |
| BHU | BCBS of South Carolina | South Carolina |
| BHV | BCBS of Minnesota | Minnesota |
| BHW | Capital Blue Cross | Cross |
| BHX | BCBS of Montana | Montana |
| BHY | Horizon BCBS of New Jersey | Jersey |
| BHZ | No Prefix Assigned | N/A |
| BIA | Anthem BCBS of Ohio | Ohio |
| BIB | Wellmark BCBS | N/A |
| BIC | Anthem BCBS of Georgia | Georgia |
| BID | Anthem Blue Cross of California | California |
| BIE | BCBS of Michigan | Michigan |
| BIF | No Prefix Assigned | N/A |
| BIG | Anthem BCBS of Ohio | Ohio |
| BIH | No Prefix Assigned | N/A |
| BII | BCBS of North Carolina | South Carolina |
| BIJ | Carefirst BCBS | N/A |
| BIK | Regence Blue Shield of Washington | Washington |
| BIL | BCBS of South Carolina | South Carolina |
| BIM | BCBS of Michigan | Michigan |
| BIN | Carefirst BCBS of Maryland | Maryland |
| BIO | Carefirst BCBS of Maryland | Maryland |
| BIP | Regence Blue Cross Blue Shield of Oregon | Oregon |
| BIQ | Horizon BCBS of New Jersey | Jersey |
| BIR | Anthem BCBS of Missouri | Missouri |
| BIS | BCBS of Michigan | Michigan |
| BIT | BCBS of Massachusetts | Massachusetts |
| BIU | BCBS of Massachusetts | Massachusetts |
| BIV | BCBS of Nebraska | Nebraska |
| BIW | BCBS of Georgia | Georgia |
| BIX | BCBS of South Carolina | South Carolina |
| BIY | Anthem BCBS of Georgia | Georgia |
| BIZ | Horizon BCBS of New Jersey | Jersey |
| BJA | Anthem BCBS of Ohio | Ohio |
| BJB | Horizon BCBS of New Jersey | Jersey |
| BJC | BCBS of Minnesota | Minnesota |
| BJD | Anthem BCBS of New Hampshire | Hampshire |
| BJE | Anthem Blue Cross of California | California |
| BJF | No Prefix Assigned | N/A |
| BJG | BCBS of Illinois | Illinois |
| BJH | Wellmark BCBS | N/A |
| BJI | BCBS of South Carolina | South Carolina |
| BJJ | No Prefix Assigned | N/A |
| BJK | Blue Cross of Idaho | Idaho |
| BJL | Anthem BCBS of Ohio | Ohio |
| BJM | Anthem BCBS of Wisconsin | Wisconsin |
| BJN | Highmark BCBS | N/A |
| BJO | BCBS of Nebraska | Nebraska |
| BJP | BCBS of Minnesota | Minnesota |
| BJQ | BCBS of Illinois | Illinois |
| BJR | Wellmark BCBS | N/A |
| BJS | Anthem Blue Cross of California | California |
| BJT | BCBS of Georgia | Georgia |
| BJU | No Prefix Assigned | N/A |
| BJV | Blue Cross of Idaho | Idaho |
| BJW | Carefirst BCBS of Maryland | Maryland |
| BJX | No Prefix Assigned | N/A |
| BJY | Anthem BCBS of Wisconsin | Wisconsin |
| BJZ | Anthem BCBS of Nevada | Nevada |
| BKA | Anthem Blue Cross of California | California |
| BKB | Wellmark BCBS | N/A |
| BKC | BCBS of Illinois | Illinois |
| BKD | Premera Blue Cross | Cross |
| BKE | BCBS of Nebraska | Nebraska |
| BKF | No Prefix Assigned | N/A |
| BKG | Wellmark BCBS | N/A |
| BKH | Premera Blue Cross | Cross |
| BKI | Anthem Blue Cross of California | California |
| BKJ | Anthem BCBS of Colorado | Colorado |
| BKK | BCBS of Texas | Texas |
| BKL | BCBS of Massachusetts | Massachusetts |
| BKM | Anthem BCBS of Wisconsin | Wisconsin |
| BKN | Blue Shield of California | California |
| BKO | Anthem BCBS of Missouri | Missouri |
| BKP | Blue Shield of California | California |
| BKQ | Premera Blue Cross | Cross |
| BKR | Wellmark BCBS | N/A |
| BKS | BCBS of Alabama | Alabama |
| BKT | Empire BCBS of New York | New York |
| BKU | Wellmark BCBS | N/A |
| BKV | BCBS of Massachusetts | Massachusetts |
| BKW | BCBS of Massachusetts | Massachusetts |
| BKX | BCBS of Massachusetts | Massachusetts |
| BKY | Blue Cross of Idaho | Idaho |
| BKZ | BCBS of Massachusetts | Massachusetts |
| BLA | BCBS of South Carolina | South Carolina |
| BLB | Anthem BCBS of Ohio | Ohio |
| BLC | BCBS of Western New York | New York |
| BLD | BCBS of Nebraska | Nebraska |
| BLE | BCBS of Alabama | Alabama |
| BLF | No Prefix Assigned | N/A |
| BLG | BCBS of Georgia | Georgia |
| BLH | Blue Cross of Idaho | Idaho |
| BLI | No Prefix Assigned | N/A |
| BLJ | Anthem BCBS of Ohio | Ohio |
| BLK | Anthem BCBS of Ohio | Ohio |
| BLL | Anthem BCBS of Wisconsin | Wisconsin |
| BLM | BCBS of Florida | Florida |
| BLN | Anthem BCBS of Ohio | Ohio |
| BLO | Anthem BCBS of Georgia | Georgia |
| BLP | Anthem BCBS of Ohio | Ohio |
| BLQ | Anthem BCBS of Wisconsin | Wisconsin |
| BLR | BCBS of Illinois | Illinois |
| BLS | Empire BCBS of New York | New York |
| BLT | BCBS of South Carolina | South Carolina |
| BLU | BCBS of Alabama | Alabama |
| BLV | Anthem BCBS of Virginia | Virginia |
| BLW | BCBS of Illinois | Illinois |
| BLX | BCBS of Illinois | Illinois |
| BLY | Anthem BCBS of Virginia | Virginia |
| BLZ | Anthem BCBS of Ohio | Ohio |
| BMA | Anthem BCBS of Wisconsin | Wisconsin |
| BMB | BCBS of Illinois | Illinois |
| BMC | BCBS of South Carolina | South Carolina |
| BMD | No Prefix Assigned | N/A |
| BME | BCBS of Vermont | Vermont |
| BMF | BCBS of Texas | Texas |
| BMG | BCBS of Texas | Texas |
| BMH | Anthem BCBS of Wisconsin | Wisconsin |
| BMI | Carefirst BCBS of Maryland | Maryland |
| BMJ | Anthem BCBS of Missouri | Missouri |
| BMK | Wellmark BCBS | N/A |
| BML | Anthem BCBS of Wisconsin | Wisconsin |
| BMM | Wellmark BCBS | N/A |
| BMN | Anthem BCBS of Ohio | Ohio |
| BMO | BCBS of Illinois | Illinois |
| BMP | Regence BCBS | N/A |
| BMQ | BCBS of Kansas City | Kansas City |
| BMR | No Prefix Assigned | N/A |
| BMS | Wellmark BCBS | N/A |
| BMT | BCBS of Illinois | Illinois |
| BMU | No Prefix Assigned | N/A |
| BMV | BCBS of Florida | Florida |
| BMW | Independence Blue Cross | Cross |
| BMX | Blue Shield of California | California |
| BMY | BCBS of Texas | Texas |
| BMZ | BCBS of Minnesota | Minnesota |
| BNA | Anthem BCBS of Ohio | Ohio |
| BNB | No Prefix Assigned | N/A |
| BNC | BCBS of Massachusetts | Massachusetts |
| BND | BCBS of Massachusetts | Massachusetts |
| BNE | BCBS of Arizona | Arizona |
| BNF | BCBS of Illinois | Illinois |
| BNG | Blue Cross of California | California |
| BNH | Carefirst Administrators | N/A |
| BNI | No Prefix Assigned | N/A |
| BNJ | No Prefix Assigned | N/A |
| BNK | BCBS of Illinois | Illinois |
| BNL | Carefirst Administrators | N/A |
| BNM | BCBS of New Mexico | Mexico |
| BNN | BCBS of Texas | Texas |
| BNO | Regence BCBS | N/A |
| BNP | Wellmark BCBS | N/A |
| BNQ | Anthem BCBS of Nevada | Nevada |
| BNR | No Prefix Assigned | N/A |
| BNS | Carefirst Administrators | N/A |
| BNT | BCBS of Illinois | Illinois |
| BNU | BCBS of Illinois | Illinois |
| BNV | Anthem BCBS of Ohio | Ohio |
| BNW | Blue Shield of California | California |
| BNX | Anthem BCBS of Missouri | Missouri |
| BNY | Anthem Blue Cross of California | California |
| BNZ | Horizon BCBS of New Jersey | Jersey |
| BOA | BCBS of South Carolina | South Carolina |
| BOB | BCBS of Florida | Florida |
| BOC | BCBS of Michigan | Michigan |
| BOD | Anthem BCBS of Ohio | Ohio |
| BOE | Blue Shield of California | California |
| BOF | BCBS of Michigan | Michigan |
| BOG | BCBS of Michigan | Michigan |
| BOH | BCBS of Alabama | Alabama |
| BOI | Wellmark BCBS | N/A |
| BOJ | Blue Shield of California | California |
| BOK | BCBS of Oklahoma | Oklahoma |
| BOL | Wellmark BCBS | N/A |
| BOM | Wellmark BCBS | N/A |
| BON | No Prefix Assigned | N/A |
| BOO | No Prefix Assigned | N/A |
| BOP | BCBS of Alabama | Alabama |
| BOQ | Carefirst Administrators | N/A |
| BOR | Premera Blue Cross | Cross |
| BOS | BCBS of Massachusetts | Massachusetts |
| BOT | Carefirst Administrators | N/A |
| BOU | BCBS of Rhose Island | Island |
| BOV | Highmark BCBS | N/A |
| BOW | BCBS of Texas | Texas |
| BOX | Blue Shield of California | California |
| BOY | Anthem BCBS of Missouri | Missouri |
| BOZ | BCBS of Minnesota | Minnesota |
| BPA | BCBS of Illinois | Illinois |
| BPB | Wellmark BCBS | N/A |
| BPC | BCBS of Minnesota | Minnesota |
| BPD | BCBS of Illinois | Illinois |
| BPE | Wellmark BCBS | N/A |
| BPF | Carefirst BCBS | N/A |
| BPG | BCBS of Illinois | Illinois |
| BPH | BCBS of Massachusetts | Massachusetts |
| BPI | Wellmark BCBS | N/A |
| BPJ | BCBS of Michigan | Michigan |
| BPK | BCBS of Michigan | Michigan |
| BPL | Anthem BCBS of Indiana | Indiana |
| BPM | Excellus BCBS of New York | New York |
| BPN | BCBS of Massachusetts | Massachusetts |
| BPO | Anthem BCBS of Ohio | Ohio |
| BPP | Anthem BCBS of New Hampshire | Hampshire |
| BPQ | BCBS of Louisiana | Louisiana |
| BPR | Empire BCBS of New York | New York |
| BPS | BCBS of Louisiana | Louisiana |
| BPT | No Prefix Assigned | N/A |
| BPU | BCBS of South Carolina | South Carolina |
| BPV | BCBS of Minnesota | Minnesota |
| BPW | BCBS of Michigan | Michigan |
| BPX | Regence BCBS of Oregon | Oregon |
| BPY | BCBS of Minnesota | Minnesota |
| BPZ | Carefirst BCBS of Maryland | Maryland |
| BQA | No Prefix Assigned | N/A |
| BQB | Regence BCBS of Washington | Washington |
| BQC | Wellmark BCBS | N/A |
| BQD | No Prefix Assigned | N/A |
| BQE | Anthem BCBS of New Hampshire | Hampshire |
| BQF | No Prefix Assigned | N/A |
| BQG | No Prefix Assigned | N/A |
| BQH | Anthem BCBS of Georgia | Georgia |
| BQI | Blue Shield of California | California |
| BQJ | No Prefix Assigned | N/A |
| BQK | Wellmark BCBS | N/A |
| BQL | Anthem BCBS of Ohio | Ohio |
| BQM | No Prefix Assigned | N/A |
| BQN | Anthem Blue Cross of California | California |
| BQO | BCBS of North Carolina | South Carolina |
| BQP | Anthem BCBS of Missouri | Missouri |
| BQQ | BCBS of Western New York | New York |
| BQR | BCBS of Nebraska | Nebraska |
| BQS | No Prefix Assigned | N/A |
| BQT | BCBS of Massachusetts | Massachusetts |
| BQU | Anthem BCBS of Ohio | Ohio |
| BQV | No Prefix Assigned | N/A |
| BQW | BCBS of Michigan | Michigan |
| BQX | Blue Cross of Idaho | Idaho |
| BQY | Anthem BCBS of Georgia | Georgia |
| BQZ | Carefirst BCBS | N/A |
| BRA | Blue Shield of California | California |
| BRB | BCBS of Illinois | Illinois |
| BRC | Blue Shield of California | California |
| BRD | Independence Blue Cross | Cross |
| BRE | BCBS of Michigan | Michigan |
| BRF | BCBS of Minnesota | Minnesota |
| BRG | BCBS of Illinois | Illinois |
| BRH | BCBS of Texas | Texas |
| BRI | No Prefix Assigned | N/A |
| BRJ | Premera Blue Cross | Cross |
| BRK | BCBS of Texas | Texas |
| BRL | Anthem BCBS of Indiana | Indiana |
| BRM | BCBS of Michigan | Michigan |
| BRN | Carefirst BCBS of Maryland | Maryland |
| BRO | BCBS of Alabama | Alabama |
| BRP | BCBS of Michigan | Michigan |
| BRQ | BCBS of Oklahoma | Oklahoma |
| BRR | Regence BCBS of Washington | Washington |
| BRS | Wellmark BCBS | N/A |
| BRT | Anthem BCBS of Indiana | Indiana |
| BRU | BCBS of Illinois | Illinois |
| BRV | BCBS of Michigan | Michigan |
| BRW | BCBS of Illinois | Illinois |
| BRX | Anthem Blue Cross of California | California |
| BRY | Blue Shield of California | California |
| BRZ | Wellmark BCBS | N/A |
| BSA | BCBS of Massachusetts | Massachusetts |
| BSB | BCBS of North Dakota | Dakota |
| BSC | BCBS of Massachusetts | Massachusetts |
| BSD | Wellmark BCBS | N/A |
| BSE | BCBS of Texas | Texas |
| BSF | No Prefix Assigned | N/A |
| BSG | Anthem BCBS of Virginia | Virginia |
| BSH | No Prefix Assigned | N/A |
| BSI | BCBS of Michigan | Michigan |
| BSJ | Independence Blue Cross | Cross |
| BSK | Carefirst BCBS of Maryland | Maryland |
| BSL | BCBS of Texas | Texas |
| BSM | BCBS of Massachusetts | Massachusetts |
| BSN | BCBS of Massachusetts | Massachusetts |
| BSO | Carefirst BCBS of Maryland | Maryland |
| BSP | No Prefix Assigned | N/A |
| BSQ | BCBS of Tennessee | Tennessee |
| BSR | Premera Blue Cross | Cross |
| BSS | BCBS of Tennessee | Tennessee |
| BST | BCBS of Massachusetts | Massachusetts |
| BSU | BCBS of South Carolina | South Carolina |
| BSV | Carefirst Administrators | N/A |
| BSW | Wellmark BCBS | N/A |
| BSX | No Prefix Assigned | N/A |
| BSY | Anthem BCBS of Wisconsin | Wisconsin |
| BSZ | Wellmark BCBS | N/A |
| BTA | BCBS of Illinois | Illinois |
| BTB | BCBS of North Carolina | South Carolina |
| BTC | BCBS of Massachusetts | Massachusetts |
| BTD | Empire BCBS of New York | New York |
| BTE | Anthem BCBS of Ohio | Ohio |
| BTF | Wellmark BCBS | N/A |
| BTG | Premera Blue Cross | Cross |
| BTH | Carefirst BCBS | N/A |
| BTI | Regence BCBS of Washington | Washington |
| BTJ | No Prefix Assigned | N/A |
| BTK | Anthem BCBS of Ohio | Ohio |
| BTL | No Prefix Assigned | N/A |
| BTM | Wellmark BCBS | N/A |
| BTN | Blue Cross of Idaho | Idaho |
| BTO | Anthem BCBS of New Hampshire | Hampshire |
| BTP | Anthem BCBS of Wisconsin | Wisconsin |
| BTQ | Regence BCBS of Washington | Washington |
| BTR | BCBS of Minnesota | Minnesota |
| BTS | Wellmark BCBS | N/A |
| BTT | Wellmark BCBS | N/A |
| BTU | BCBS of Arkansas Health Advantage | N/A |
| BTV | Regence Blue Cross Blue Shield of Oregon | Oregon |
| BTW | Anthem Blue Cross of California | California |
| BTX | Anthem BCBS of Virginia | Virginia |
| BTY | Anthem BCBS of Georgia | Georgia |
| BTZ | Wellmark BCBS | N/A |
| BUA | Carefirst Administrators | N/A |
| BUB | BCBS of Michigan | Michigan |
| BUC | Blue Shield of California | California |
| BUD | BCBS of Michigan | Michigan |
| BUE | Anthem BCBS of Missouri | Missouri |
| BUF | BCBS of Michigan | Michigan |
| BUG | No Prefix Assigned | N/A |
| BUH | Highmark BCBS | N/A |
| BUI | Anthem BCBS of Virginia | Virginia |
| BUJ | BCBS of Western New York | New York |
| BUK | Anthem BCBS of Ohio | Ohio |
| BUL | BCBS of South Carolina | South Carolina |
| BUM | Anthem BCBS of Virginia | Virginia |
| BUN | BCBS of South Carolina | South Carolina |
| BUO | BCBS of Massachusetts | Massachusetts |
| BUP | No Prefix Assigned | N/A |
| BUQ | BCBS of South Carolina | South Carolina |
| BUR | Anthem BCBS of Ohio | Ohio |
| BUS | Wellmark BCBS | N/A |
| BUT | No Prefix Assigned | N/A |
| BUU | BCBS of North Carolina | South Carolina |
| BUV | BCBS of Minnesota | Minnesota |
| BUW | Wellmark BCBS | N/A |
| BUX | BCBS of Michigan | Michigan |
| BUY | No Prefix Assigned | N/A |
| BUZ | BCBS of Minnesota | Minnesota |
| BVA | Anthem BCBS of Virginia | Virginia |
| BVB | Wellmark BCBS | N/A |
| BVC | Carefirst BCBS of Maryland | Maryland |
| BVD | Blue Shield of California | California |
| BVE | Premera Blue Cross | Cross |
| BVF | Wellmark BCBS | N/A |
| BVG | BCBS of Illinois | Illinois |
| BVH | BCBS of Massachusetts | Massachusetts |
| BVI | BCBS of Louisiana | Louisiana |
| BVJ | Horizon BCBS of New Jersey | Jersey |
| BVK | Anthem BCBS of Ohio | Ohio |
| BVL | Empire BCBS of New York | New York |
| BVM | BCBS of Kansas City | Kansas City |
| BVN | Anthem BCBS of Virginia | Virginia |
| BVO | Blue Cross of Idaho | Idaho |
| BVP | BCBS of Tennessee | Tennessee |
| BVQ | Wellmark BCBS | N/A |
| BVR | Premera Blue Cross | Cross |
| BVS | No Prefix Assigned | N/A |
| BVT | BCBS of Western New York | New York |
| BVU | Anthem BCBS of Ohio | Ohio |
| BVV | Horizon BCBS of New Jersey | Jersey |
| BVW | BCBS of Nebraska | Nebraska |
| BVX | No Prefix Assigned | N/A |
| BVY | Horizon BCBS of New Jersey | Jersey |
| BVZ | BCBS of Minnesota | Minnesota |
| BWA | BCBS of Vermont | Vermont |
| BWB | Carefirst Administrators | N/A |
| BWC | BCBS of Texas | Texas |
| BWD | BCBS of Michigan | Michigan |
| BWE | Anthem BCBS of Ohio | Ohio |
| BWF | BCBS of South Carolina | South Carolina |
| BWG | Anthem BCBS of Virginia | Virginia |
| BWH | Wellmark BCBS | N/A |
| BWI | Anthem BCBS of Virginia | Virginia |
| BWJ | Horizon BCBS of New Jersey | Jersey |
| BWK | Wellmark BCBS | N/A |
| BWL | BCBS of Illinois | Illinois |
| BWM | Wellmark BCBS | N/A |
| BWN | BCBS of Michigan | Michigan |
| BWO | BCBS of South Carolina | South Carolina |
| BWP | Anthem BCBS of Ohio | Ohio |
| BWQ | Carefirst Administrators | N/A |
| BWR | Anthem BCBS of Virginia | Virginia |
| BWS | BCBS of Nebraska | Nebraska |
| BWT | Anthem BCBS of Virginia | Virginia |
| BWU | BCBS of Rhose Island | Island |
| BWV | Anthem BCBS of Ohio | Ohio |
| BWW | Independence Blue Cross | Cross |
| BWX | Regence BCBS of Oregon | Oregon |
| BWY | Anthem BCBS of Ohio | Ohio |
| BWZ | Anthem Blue Cross of California | California |
| BXA | Anthem BCBS of Missouri | Missouri |
| BXB | BCBS of Illinois | Illinois |
| BXC | Anthem Blue Cross of California | California |
| BXD | No Prefix Assigned | N/A |
| BXE | BCBS of Illinois | Illinois |
| BXF | BCBS of Western New York | New York |
| BXG | BCBS of Massachusetts | Massachusetts |
| BXH | BCBS of Western New York | New York |
| BXI | Carefirst BCBS | N/A |
| BXJ | BCBS of Georgia | Georgia |
| BXK | BCBS of Illinois | Illinois |
| BXL | BCBS of Alabama | Alabama |
| BXM | No Prefix Assigned | N/A |
| BXN | Anthem BCBS of Maine | Maine |
| BXO | Carefirst BCBS of Maryland | Maryland |
| BXP | BCBS of Western New York | New York |
| BXQ | BCBS of Illinois | Illinois |
| BXR | Anthem BCBS of Ohio | Ohio |
| BXS | No Prefix Assigned | N/A |
| BXT | BCBS of Minnesota | Minnesota |
| BXU | BCBS of Massachusetts | Massachusetts |
| BXV | BCBS of Michigan | Michigan |
| BXW | Blue Cross of Idaho | Idaho |
| BXX | No Prefix Assigned | N/A |
| BXY | Carefirst BCBS of Maryland | Maryland |
| BXZ | No Prefix Assigned | N/A |
| BYA | Horizon BCBS of New Jersey | Jersey |
| BYB | Anthem BCBS of Indiana | Indiana |
| BYC | Anthem BCBS of Ohio | Ohio |
| BYD | BCBS of Alabama | Alabama |
| BYE | Horizon BCBS of New Jersey | Jersey |
| BYF | Carefirst Administrators | N/A |
| BYG | Carefirst BCBS of Maryland | Maryland |
| BYH | BCBS of Georgia | Georgia |
| BYI | Carefirst BCBS of Maryland | Maryland |
| BYJ | Anthem Blue Cross of California | California |
| BYK | Anthem BCBS of Indiana | Indiana |
| BYL | BCBS of Georgia | Georgia |
| BYM | Anthem BCBS of Nevada | Nevada |
| BYN | Anthem BCBS of Connecticut | Connecticut |
| BYO | Blue Cross of Idaho | Idaho |
| BYP | Anthem BCBS of Indiana | Indiana |
| BYQ | Regence BCBS | N/A |
| BYR | BCBS of Illinois | Illinois |
| BYS | Capital Blue Cross | Cross |
| BYT | No Prefix Assigned | N/A |
| BYU | Anthem BCBS of Maine | Maine |
| BYV | Anthem BCBS of New Hampshire | Hampshire |
| BYW | Regence BCBS of Oregon | Oregon |
| BYX | Horizon BCBS of New Jersey | Jersey |
| BYY | No Prefix Assigned | N/A |
| BYZ | Anthem BCBS of Indiana | Indiana |
| BZA | BCBS of Minnesota | Minnesota |
| BZB | Premera Blue Cross | Cross |
| BZC | Blue Shield of California | California |
| BZD | Anthem BCBS of Georgia | Georgia |
| BZE | Blue Shield of California | California |
| BZF | No Prefix Assigned | N/A |
| BZG | Wellmark BCBS | N/A |
| BZH | BCBS of Michigan | Michigan |
| BZI | Wellmark BCBS | N/A |
| BZJ | Blue Cross of Idaho | Idaho |
| BZK | Premera Blue Cross | Cross |
| BZL | BCBS of Arkansas Blue Advantage | N/A |
| BZM | Anthem BCBS of Ohio | Ohio |
| BZN | No Prefix Assigned | N/A |
| BZO | BCBS of South Carolina | South Carolina |
| BZP | BCBS of North Carolina | South Carolina |
| BZQ | No Prefix Assigned | N/A |
| BZR | Wellmark BCBS | N/A |
| BZS | BCBS of South Carolina | South Carolina |
| BZT | Blue Shield of California | California |
| BZU | BCBS of Michigan | Michigan |
| BZV | Carefirst Administrators | N/A |
| BZW | Wellmark BCBS | N/A |
| BZX | BCBS of Michigan | Michigan |
| BZY | Anthem BCBS of Kentucky | Kentucky |
| BZZ | BCBS of North Carolina | South Carolina |