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