Insurance Identifier Lookup MAA – MZZ
| Prefix | Plan Name | |
|---|---|---|
| M2C | Blue Cross Blue Shield of Illinois | |
| M2D | Blue Cross Blue Shield of Illinois | |
| M2E | Blue Cross Blue Shield of Texas | |
| M2F | Blue Cross Blue Shield of Texas | |
| M2G | Blue Cross Blue Shield of Texas | |
| M2H | Regence Blue Cross Blue Shield of Oregon | |
| M2I | BCBS of Western New York | |
| M2J | Blue Cross Blue Shield of Illinois | |
| M2K | BCBS of Arizona | |
| M2L | Blue Cross Blue Shield of Massachusetts | |
| M2N | Anthem BCBS of Wisconsin | |
| M2P | Regence Blue Cross Blue Shield of Oregon | |
| M2Q | Anthem BCBS of Wisconsin | |
| M2R | Blue Cross Blue Shield of Texas | |
| M2S | Blue Cross Blue Shield of Illinois | |
| M2T | Regence Blue Cross Blue Shield of Oregon | |
| M2U | Anthem BCBS of Wisconsin | |
| M2V | BCBS if Arizona | |
| M2W | Blue Cross Blue Shield of Rhode Island | |
| M2X | Blue Cross Blue Shield of Illinois | |
| M2Y | Regence Blue Cross Blue Shield of Oregon | |
| M3A | BCBS of Kansas | |
| M3B | BCBS of Western New York | |
| M3C | Blue Cross Blue Shield of Rhode Island | |
| M3D | Regence Blue Cross Blue Shield of Oregon | |
| M3E | Blue Cross Blue Shield of Illinois | |
| M3F | Blue Cross Blue Shield of Texas | |
| M3G | Blue Cross Blue Shield of Rhode Island | |
| M3H | Blue Cross Blue Shield of Minnesota | |
| M3J | Empire Blue Cross Blue Shield | |
| M3K | Anthem BCBS of Wisconsin | |
| M3L | Blue Cross Blue Shield of Michigan | |
| M3M | Regence Blue Cross Blue Shield of Oregon | |
| M3P | BCBS of Arizona | |
| M3R | Blue Cross Blue Shield of Texas | |
| M3S | Blue Cross Blue Shield of Illinois | |
| M3T | Anthem BCBS of Georgia | |
| M3U | Anthem BCBS of Indiana | |
| M3V | BCBS of Arizona | |
| M3W | Regence Blue Cross Blue Shield of Oregon | |
| M3X | Anthem BCBS of Wisconsin | |
| M3Y | Anthem BCBS of Georgia | |
| M3Z | Anthem BCBS of Georgia | |
| M4A | Highmark BCBS of Pennsylvania | |
| M4B | Highmark BCBS of Pennsylvania | |
| M4C | Anthem BCBS of Kentucky | |
| M4D | Regence Blue Cross Blue Shield of Oregon | |
| M4F | Blue Cross Blue Shield of Texas | |
| M4G | Anthem BCBS of Virginia | |
| M4H | Anthem BCBS of Missouri | |
| M4L | Highmark BCBS of Pennsylvania | |
| M4M | Anthem BCBS of Missouri | |
| M4N | Anthem BCBS of Virginia | |
| M4P | Blue Cross Blue Shield of Texas | |
| M4Q | Blue Cross Blue Shield of Michigan | |
| M4R | Blue Shield of Northeastern New York | |
| M4S | Blue Cross Blue Shield of Illinois | |
| M4T | Regence Blue Cross Blue Shield of Oregon | |
| M4U | Blue Cross Blue Shield of Minnesota | |
| M4Y | Blue Cross of Idaho | |
| M5A | Blue Cross Blue Shield of Minnesota | |
| M5C | Anthem BCBS of Missouri | |
| M5D | Anthem BCBS of Missouri | |
| M5E | Anthem BCBS of Missouri | |
| M5F | Blue Cross Blue Shield of Texas | |
| M5K | Blue Cross Blue Shield of Illinois | |
| M5M | Blue Cross Blue Shield of Texas | |
| M5R | BCBS of Western New York | |
| M5X | Blue Cross Blue Shield of Illinois | |
| M6A | Blue Cross Blue Shield of Texas | |
| M6C | Empire Blue Cross Blue Shield | |
| M6F | Blue Cross Blue Shield of Texas | |
| M6S | Blue Cross Blue Shield of Illinois | |
| M6U | Anthem BCBS of Ohio | |
| M7A | Blue Cross of California | |
| M7B | Premera Blue Cross | |
| M7C | Empire Blue Cross Blue Shield | |
| M7D | Blue Cross Blue Shield of North Dakota | |
| M7E | Blue Cross of California | |
| M7F | Blue Cross Blue Shield of Texas | |
| M7M | Anthem BCBS of Colorado | |
| M7S | Blue Cross Blue Shield of Illinois | |
| M7V | Anthem BCBS of Missouri | |
| M7W | Anthem BCBS of Indiana | |
| M7X | Anthem BCBS of Kentucky | |
| M8A | Anthem BCBS of Colorado | |
| M8F | Blue Cross Blue Shield of Texas | |
| M8H | Empire Blue Cross Blue Shield | |
| M8S | Blue Cross Blue Shield of Illinois | |
| M8W | Anthem BCBS of Maine | |
| M8X | Anthem BCBS of New Hampshire | |
| M8Z | Unassigned Prefix | |
| M9A | Empire Blue Cross Blue Shield | |
| M9C | Empire Blue Cross Blue Shield | |
| M9F | Blue Cross Blue Shield of Texas | |
| M9N | Blue Cross of California | |
| M9S | Blue Cross Blue Shield of Illinois | |
| M9T | Blue Cross Blue Shield of Texas | |
| M9X | Unassigned Prefix | |
| MAA | Premera Blue Cross |
| MAB | BCBS of Florida | |
| MAC | BCBS of Minnesota | |
| MAD | Premera Blue Cross | |
| MAE | Anthem BCBS of Ohio | |
| MAF | Carefirst BCBS of Maryland | |
| MAG | BCBS of New Mexico | |
| MAH | Anthem BCBS of Virginia | |
| MAI | Wellmark BCBS | |
| MAJ | Blue Shield of California | |
| MAK | Anthem BCBS of Kentucky | |
| MAL | Carefirst BCBS of Maryland | |
| MAM | Carefirst BCBS | |
| MAN | Carefirst BCBS of Maryland | |
| MAO | BCBS of South Carolina | |
| MAP | Anthem BCBS of Colorado | |
| MAQ | BCBS of Florida | |
| MAR | Anthem BCBS of Georgia | |
| MAS | Anthem BCBS of Georgia | |
| MAT | BCBS of Texas | |
| MAU | Wellmark BCBS | |
| MAV | Anthem BCBS of Ohio | |
| MAW | Carefirst BCBS of Maryland | |
| MAX | BCBS of Illinois | |
| MAY | BCBS of Nebraska | |
| MAZ | Wellmark BCBS | |
| MBA | Anthem BCBS of Ohio | |
| MBB | Anthem BCBS of Colorado | |
| MBC | BCBS of Tennessee | |
| MBD | Carefirst BCBS of Maryland | |
| MBE | BCBS of South Carolina | |
| MBF | Anthem Blue Cross of California | |
| MBG | BCBS of Alabama | |
| MBH | BCBS of Alabama | |
| MBI | BCBS of Michigan | |
| MBJ | Regence Blue Shield of Washington | |
| MBK | Empire BCBS of New York | |
| MBL | Anthem Blue Cross of California | |
| MBM | BCBS of Illinois | |
| MBN | BCBS of Michigan | |
| MBO | BCBS of Florida | |
| MBP | Anthem BCBS of Indiana | |
| MBQ | Wellmark BCBS | |
| MBR | Anthem Blue Cross of California | |
| MBS | Carefirst BCBS | |
| MBT | Anthem BCBS of Missouri | |
| MBU | BCBS of Massachusetts | |
| MBV | Carefirst BCBS of Maryland | |
| MBW | Anthem BCBS of Ohio | |
| MBX | Unassigned Prefix | |
| MBY | Unassigned Prefix | |
| MBZ | Carefirst BCBS of Maryland | |
| MCA | Blue Shield of California | |
| MCB | Unassigned Prefix | |
| MCC | BCBS of Texas | |
| MCD | BCBS of Illinois | |
| MCE | Premera Blue Cross | |
| MCF | Carefirst BCBS of Maryland | |
| MCG | Carefirst BCBS of Maryland | |
| MCH | BCBS of Florida | |
| MCI | Anthem Blue Cross of California | |
| MCJ | Highmark BCBS | |
| MCK | Wellmark BCBS | |
| MCL | Wellmark BCBS | |
| MCM | Premera Blue Cross | |
| MCN | BCBS of Kansas City | |
| MCO | Anthem BCBS of Virginia | |
| MCP | Unassigned Prefix | |
| MCQ | BCBS of Illinois | |
| MCR | Carefirst BCBS of Maryland | |
| MCS | Carefirst BCBS of Maryland | |
| MCT | Wellmark BCBS | |
| MCU | Anthem Blue Cross of California | |
| MCV | Wellmark BCBS | |
| MCW | Wellmark BCBS | |
| MCX | BCBS of Massachusetts | |
| MCY | Highmark BCBS | |
| MCZ | Anthem BCBS of Ohio | |
| MDA | BCBS of Michigan | |
| MDB | BCBS of Alabama | |
| MDC | BCBS of Minnesota | |
| MDD | BCBS of Georgia | |
| MDE | Anthem Blue Cross of California | |
| MDF | Independence Blue Cross | |
| MDG | BCBS of Michigan | |
| MDH | BCBS of Rhose Island | |
| MDI | Wellmark BCBS | |
| MDJ | Anthem BCBS of Indiana | |
| MDK | BCBS of Arizona | |
| MDL | BCBS of Illinois | |
| MDM | Carefirst BCBS of Maryland | |
| MDN | Anthem BCBS of Wisconsin | |
| MDO | Wellmark BCBS | |
| MDP | Blue Shield of California | |
| MDQ | BCBS of Minnesota | |
| MDR | Anthem BCBS of Wisconsin | |
| MDS | Carefirst BCBS of Maryland | |
| MDT | Carefirst Administrators | |
| MDU | Wellmark BCBS | |
| MDV | BCBS of Illinois | |
| MDW | Wellmark BCBS |
| MDX | BCBS of Alabama | |
| MDY | BCBS of Kansas City | |
| MDZ | BCBS of Minnesota | |
| MEA | Blue Shield of California | |
| MEB | Unassigned Prefix | |
| MEC | Anthem BCBS of Virginia | |
| MED | Anthem BCBS of Ohio | |
| MEE | BCBS of Massachusetts | |
| MEF | Carefirst BCBS of Maryland | |
| MEG | Anthem BCBS of Georgia | |
| MEH | Carefirst BCBS of Maryland | |
| MEI | BCBS of Michigan | |
| MEJ | Carefirst BCBS of Maryland | |
| MEK | Blue Shield of California | |
| MEL | Wellmark BCBS | |
| MEM | Wellmark BCBS | |
| MEN | Anthem BCBS of Maine | |
| MEO | Blue Shield of California | |
| MEP | Anthem BCBS of Maine | |
| MEQ | Blue Shield of California | |
| MER | Anthem BCBS of Wisconsin | |
| MES | BCBS of Illinois | |
| MET | BCBS of Nebraska | |
| MEU | BCBS of Texas | |
| MEV | Unassigned Prefix | |
| MEW | Anthem BCBS of Maine | |
| MEX | BCBS of New Mexico | |
| MEY | Anthem BCBS of Maine | |
| MEZ | BCBS of New Mexico | |
| MFA | BCBS of Illinois | |
| MFB | Wellmark BCBS | |
| MFC | Carefirst BCBS of Maryland | |
| MFD | Anthem BCBS of Georgia | |
| MFE | Anthem Blue Cross of California | |
| MFF | Regence BCBS of Oregon | |
| MFG | Anthem BCBS of Ohio | |
| MFH | Anthem BCBS of Georgia | |
| MFI | Wellmark BCBS | |
| MFJ | BCBS of Wisconsin | |
| MFK | BCBS of Mississippi | |
| MFL | Independence Blue Cross | |
| MFM | Anthem BCBS of Georgia | |
| MFN | Anthem BCBS of Virginia | |
| MFO | Anthem BCBS of Wisconsin | |
| MFP | Regence BCBS of Oregon | |
| MFQ | Anthem BCBS of Virginia | |
| MFR | Unassigned Prefix | |
| MFS | Carefirst Administrators | |
| MFT | Anthem Blue Cross of California | |
| MFU | Wellmark BCBS | |
| MFV | BCBS of Illinois | |
| MFW | Anthem Blue Cross of California | |
| MFX | BCBS of Michigan | |
| MFY | BCBS of Minnesota | |
| MGA | Independence Blue Cross | |
| MGB | Capital Blue Cross | |
| MGC | Unassigned Prefix | |
| MGD | Premera Blue Cross | |
| MGE | BCBS of Rhode Island | |
| MGF | Anthem BCBS of Nevada | |
| MGG | Independence Blue Cross | |
| MGH | BCBS of Massachusetts | |
| MGI | Highmark BCBS | |
| MGJ | Anthem BCBS of Missouri | |
| MGK | Wellmark BCBS | |
| MGL | Independence Blue Cross | |
| MGM | Carefirst BCBS of Maryland | |
| MGN | Unassigned Prefix | |
| MGO | BCBS of Michigan | |
| MGP | Wellmark BCBS | |
| MGQ | BCBS of Minnesota | |
| MGR | BCBS of Michigan | |
| MGS | BCBS of Georgia | |
| MGT | Regence BCBS of Oregon | |
| MGU | Anthem BCBS of Virginia | |
| MGV | BCBS of South Carolina | |
| MGW | BCBS of Arkansas | |
| MGX | BCBS of Massachusetts | |
| MGY | Blue Shield of California | |
| MGZ | Horizon BCBS of New Jersey | |
| MHA | BCBS of South Carolina | |
| MHB | BCBS of Texas | |
| MHC | Highmark BCBS | |
| MHD | Empire BCBS of New York | |
| MHE | Unassigned Prefix | |
| MHF | Wellmark BCBS | |
| MHG | Anthem Blue Cross of California | |
| MHH | BCBS of Michigan | |
| MHI | Anthem BCBS of Georgia | |
| MHJ | Unassigned Prefix | |
| MHK | Wellmark BCBS | |
| MHL | BCBS of South Carolina | |
| MHM | Carefirst BCBS of Maryland | |
| MHN | Anthem BCBS of Ohio | |
| MHO | Unassigned Prefix | |
| MHP | Empire BCBS | |
| MHQ | Anthem BCBS of Georgia | |
| MHR | Unassigned Prefix | |
| MHS | BCBS of Nebraska | |
| MHT | Carefirst BCBS of Maryland |
| MHU | Unassigned Prefix | |
| MHV | Unassigned Prefix | |
| MHW | BCBS of Alabama | |
| MHX | BCBS of Georgia | |
| MHY | Anthem Blue Cross of California | |
| MHZ | Wellmark BCBS | |
| MIA | Blue Shield of California | |
| MIB | BCBS of Minnesota | |
| MIC | BCBS of South Carolina | |
| MID | Unassigned Prefix | |
| MIE | BCBS of Minnesota | |
| MIF | Anthem BCBS of Ohio | |
| MIG | BCBS of Michigan | |
| MIH | BCBS of Georgia | |
| MII | BCBS of Kansas City | |
| MIJ | BCBS of Michigan | |
| MIK | Unassigned Prefix | |
| MIL | BCBS of Massachusetts | |
| MIM | Highmark BCBS | |
| MIN | Premera Blue Cross | |
| MIO | Blue Shield of California | |
| MIP | Blue Cross of Idaho | |
| MIQ | Anthem BCBS of Ohio | |
| MIR | Unassigned Prefix | |
| MIS | Anthem BCBS of Ohio | |
| MIT | Wellmark BCBS | |
| MIU | BCBS of South Carolina | |
| MIV | BCBS of Western New York | |
| MIW | BCBS of Michigan | |
| MIX | Blue Shield of California | |
| MIY | Unassigned Prefix | |
| MIZ | Blue Shield of California | |
| MJA | Blue Shield of Northeastern New York | |
| MJB | Anthem BCBS of Colorado | |
| MJC | BCBS of Texas | |
| MJD | BCBS of Alabama | |
| MJE | BCBS of Michigan | |
| MJF | Carefirst BCBS | |
| MJG | Premera Blue Cross | |
| MJH | Anthem BCBS of Wisconsin | |
| MJI | Carefirst BCBS of Maryland | |
| MJJ | BCBS of Michigan | |
| MJK | Carefirst BCBS | |
| MJL | Anthem Blue Cross of California | |
| MJM | Highmark BCBS | |
| MJN | Highmark BCBS | |
| MJO | Anthem BCBS of Connecticut | |
| MJP | Wellmark BCBS | |
| MJQ | Anthem Blue Cross of California | |
| MJR | BCBS of Michigan | |
| MJS | BCBS of Texas | |
| MJT | BCBS of Michigan | |
| MJU | BCBS of Michigan | |
| MJV | Anthem BCBS of Missouri | |
| MJW | BCBS of Georgia | |
| MJX | BCBS of Michigan | |
| MJY | Unassigned Prefix | |
| MJZ | Unassigned Prefix | |
| MKA | Wellmark BCBS | |
| MKB | Blue Shield of California | |
| MKC | BCBS of South Carolina | |
| MKD | BCBS of Massachusetts | |
| MKE | BCBS of Tennessee | |
| MKF | Premera Blue Cross | |
| MKG | Anthem BCBS of Ohio | |
| MKH | BCBS of Tennessee | |
| MKI | BCBS of Tennessee | |
| MKJ | Anthem BCBS of Ohio | |
| MKK | Anthem Blue Cross of California | |
| MKL | BCBS of Mississippi | |
| MKM | Carefirst BCBS of Maryland | |
| MKN | Anthem BCBS of Virginia | |
| MKO | BCBS of Michigan | |
| MKP | Anthem BCBS of Virginia | |
| MKQ | Anthem Blue Cross of California | |
| MKR | BCBS of Illinois | |
| MKS | BCBS of Massachusetts | |
| MKT | Wellmark BCBS | |
| MKU | Premera Blue Cross | |
| MKV | Horizon BCBS of New Jersey | |
| MKW | BCBS of Florida | |
| MKX | Anthem BCBS of Virginia | |
| MKY | Horizon BCBS of New Jersey | |
| MKZ | Carefirst BCBS of Maryland | |
| MLA | Wellmark BCBS | |
| MLB | Unassigned Prefix | |
| MLC | BCBS of Illinois | |
| MLD | Unassigned Prefix | |
| MLE | BCBS of Illinois | |
| MLF | Carefirst BCBS | |
| MLG | Highmark BCBS | |
| MLH | Carefirst BCBS of Maryland | |
| MLI | Independence Blue Cross | |
| MLJ | Carefirst BCBS of Maryland | |
| MLK | Anthem BCBS of Virginia | |
| MLL | Blue Shield of California | |
| MLM | Highmark BCBS | |
| MLN | Blue Shield of California | |
| MLO | BCBS of Western New York | |
| MLP | Anthem BCBS of Virginia |
| MLQ | BCBS of Minnesota | |
| MLR | BCBS of Massachusetts | |
| MLS | BCBS of Alabama | |
| MLT | BCBS of Nebraska | |
| MLU | BCBS of Minnesota | |
| MLV | BCBS of Minnesota | |
| MLW | BCBS of Georgia | |
| MLX | Carefirst BCBS of Maryland | |
| MLY | Premera Blue Cross | |
| MLZ | BCBS of Rhode Island | |
| MMA | Empire BCBS | |
| MMB | Carefirst BCBS of Maryland | |
| MMC | Unassigned Prefix | |
| MMD | Premera Blue Cross | |
| MME | Carefirst BCBS | |
| MMF | Excellus BCBS of New York | |
| MMG | BCBS of Mississippi | |
| MMH | Empire BCBS | |
| MMI | Independence Blue Cross | |
| MMJ | BCBS of Michigan | |
| MMK | BCBS of Illinois | |
| MML | BCBS of Illinois | |
| MMM | BCBS of Minnesota | |
| MMN | BCBS of Tennessee | |
| MMO | BCBS of Michigan | |
| MMP | BCBS of North Carolina | |
| MMQ | Anthem BCBS of Ohio | |
| MMR | BCBS of Massachusetts | |
| MMS | Anthem BCBS of Ohio | |
| MMT | Carefirst Administrators | |
| MMU | BCBS of Illinois | |
| MMV | Anthem BCBS of Ohio | |
| MMW | BCBS of Illinois | |
| MMX | BCBS of Alabama | |
| MMY | Unassigned Prefix | |
| MMZ | Wellmark BCBS | |
| MNA | BCBS of Minnesota | |
| MNB | BCBS of Massachusetts | |
| MNC | Anthem Blue Cross of California | |
| MND | Anthem BCBS of Wisconsin | |
| MNE | Anthem BCBS of Wisconsin | |
| MNF | Independence Blue Cross | |
| MNG | BCBS of Tennessee | |
| MNH | Anthem BCBS of Virginia | |
| MNI | BCBS of Georgia | |
| MNJ | Anthem BCBS of Ohio | |
| MNK | BCBS of Michigan | |
| MNL | BCBS of South Carolina | |
| MNM | BCBS of Minnesota | |
| MNN | Highmark BCBS | |
| MNO | BCBS of North Carolina | |
| MNP | Blue Shield of California | |
| MNQ | BCBS of Minnesota | |
| MNR | BCBS of Minnesota | |
| MNS | Anthem BCBS of Kentucky | |
| MNT | BCBS of Illinois | |
| MNU | BCBS of North Carolina | |
| MNV | Unassigned Prefix | |
| MNW | Premera Blue Cross | |
| MNX | BCBS of Illinois | |
| MNY | Premera Blue Cross | |
| MNZ | Wellmark BCBS | |
| MOA | BCBS of Massachusetts | |
| MOB | Unassigned Prefix | |
| MOC | BCBS of Georgia | |
| MOD | BCBS of Massachusetts | |
| MOE | BCBS of Illinois | |
| MOF | Blue Shield of California | |
| MOG | BCBS of South Carolina | |
| MOH | Unassigned Prefix | |
| MOI | BCBS of Massachusetts | |
| MOJ | Anthem BCBS of Ohio | |
| MOK | Independence Blue Cross | |
| MOL | Unassigned Prefix | |
| MOM | Anthem Blue Cross of California | |
| MON | Unassigned Prefix | |
| MOO | Unassigned Prefix | |
| MOP | Unassigned Prefix | |
| MOQ | Independence Blue Cross | |
| MOR | Premera Blue Cross | |
| MOS | Blue Shield of California | |
| MOT | BCBS of Massachusetts | |
| MOU | BCBS of Michigan | |
| MOV | BCBS of Arkansas | |
| MOW | Anthem BCBS of Kentucky | |
| MOX | BCBS of Illinois | |
| MOY | Wellmark BCBS | |
| MOZ | Unassigned Prefix | |
| MPA | BCBS of Mississippi | |
| MPB | Unassigned Prefix | |
| MPC | BCBS of Rhose Island | |
| MPD | BCBS of Texas | |
| MPE | BCBS of Michigan | |
| MPF | Excellus BCBS of New York | |
| MPG | Independence Blue Cross | |
| MPH | BCBS of Massachusetts | |
| MPI | Anthem Blue Cross of California | |
| MPJ | Unassigned Prefix | |
| MPK | Unassigned Prefix | |
| MPL | BCBS of Illinois |
| MPM | Highmark BCBS | |
| MPN | Wellmark BCBS | |
| MPO | BCBS of Alabama | |
| MPP | Anthem BCBS of Wisconsin | |
| MPQ | BCBS of Minnesota | |
| MPR | Anthem Blue Cross of California | |
| MPS | BCBS of Georgia | |
| MPT | BCBS of Minnesota | |
| MPU | Anthem BCBS of Ohio | |
| MPV | BCBS of Minnesota | |
| MPW | BCBS of Nebraska | |
| MPX | BCBS of Minnesota | |
| MPY | BCBS of Florida | |
| MPZ | Unassigned Prefix | |
| MQA | BCBS of Michigan | |
| MQB | Empire BCBS | |
| MQC | Anthem Blue Cross of California | |
| MQD | Carefirst Administrators | |
| MQE | Anthem BCBS of Georgia | |
| MQF | BCBS of Western New York | |
| MQG | Carefirst BCBS | |
| MQH | BCBS of Michigan | |
| MQI | Wellmark BCBS | |
| MQJ | BCBS of Michigan | |
| MQK | BCBS of Michigan | |
| MQL | Anthem BCBS of Georgia | |
| MQM | Unassigned Prefix | |
| MQN | BCBS of North Carolina | |
| MQO | BCBS of Michigan | |
| MQP | Anthem Blue Cross of California | |
| MQQ | Blue Cross of Idaho | |
| MQR | Highmark BCBS | |
| MQS | Unassigned Prefix | |
| MQT | BCBS of Minnesota | |
| MQU | Anthem BCBS of Ohio | |
| MQV | BCBS of Nebraska | |
| MQW | BCBS of Michigan | |
| MQX | Anthem Blue Cross of California | |
| MQY | BCBS of North Carolina | |
| MQZ | Anthem Blue Cross of California | |
| MRA | Anthem BCBS of Virginia | |
| MRB | Unassigned Prefix | |
| MRC | BCBS of Illinois | |
| MRD | Unassigned Prefix | |
| MRE | Wellmark BCBS | |
| MRF | BCBS of Michigan | |
| MRG | BCBS of Illinois | |
| MRH | Anthem BCBS of Wisconsin | |
| MRI | Blue Shield of California | |
| MRJ | Carefirst BCBS of Maryland | |
| MRK | BCBS of Massachusetts | |
| MRL | Wellmark BCBS | |
| MRM | BCBS of Kansas City | |
| MRN | Anthem BCBS of Wisconsin | |
| MRO | Unassigned Prefix | |
| MRP | Anthem BCBS of Wisconsin | |
| MRQ | BCBS of Western New York | |
| MRR | Anthem Blue Cross of California | |
| MRS | Wellmark BCBS | |
| MRT | BCBS of Texas | |
| MRU | Highmark BCBS | |
| MRV | Anthem Blue Cross of California | |
| MRW | BCBS of Illinois | |
| MRX | Anthem BCBS of Wisconsin | |
| MRY | BCBS of Alabama | |
| MRZ | BCBS of Illinois | |
| MSA | BCBS of Alabama | |
| MSB | Wellmark BCBS | |
| MSC | BCBS of Alabama | |
| MSD | Independence Blue Cross | |
| MSE | BCBS of Michigan | |
| MSF | Empire BCBS of New York | |
| MSG | BCBS of Michigan | |
| MSH | BCBS of Michigan | |
| MSI | Regence BCBS of Oregon | |
| MSJ | Premera Blue Cross | |
| MSK | BCBS of Massachusetts | |
| MSL | Carefirst Administrators | |
| MSM | Carefirst BCBS of Maryland | |
| MSN | Anthem BCBS of Ohio | |
| MSO | BCBS of Nebraska | |
| MSP | Premera Blue Cross | |
| MSQ | Premera Blue Cross | |
| MSR | BCBS of Michigan | |
| MSS | Highmark BCBS | |
| MST | Premera Blue Cross | |
| MSU | Anthem BCBS of Ohio | |
| MSV | BCBS of Alabama | |
| MSW | BCBS of Illinois | |
| MSX | Anthem Blue Cross of California | |
| MSY | Premera Blue Cross | |
| MSZ | Anthem Blue Cross of California | |
| MTA | Anthem BCBS of Virginia | |
| MTB | Wellmark BCBS | |
| MTC | Anthem BCBS of Virginia | |
| MTD | Premera Blue Cross | |
| MTE | Blue Shield of California | |
| MTF | Anthem BCBS of Georgia | |
| MTG | Carefirst BCBS of Maryland | |
| MTH | Wellmark BCBS |
| MTI | Empire BCBS of New York | |
| MTJ | Blue Cross of Idaho | |
| MTK | Wellmark BCBS | |
| MTL | BCBS of Texas | |
| MTM | BCBS of South Carolina | |
| MTN | BCBS of Massachusetts | |
| MTO | Blue Shield of California | |
| MTP | BCBS of Massachusetts | |
| MTQ | Blue Shield of California | |
| MTR | BCBS of Tennessee | |
| MTS | Carefirst BCBS of Maryland | |
| MTT | Blue Shield of California | |
| MTU | Premera Blue Cross | |
| MTV | Anthem BCBS of Indiana | |
| MTW | Anthem BCBS of Ohio | |
| MTX | Carefirst Administrators | |
| MTY | Anthem Blue Cross of California | |
| MTZ | BCBS of Illinois | |
| MUA | BCBS of Texas | |
| MUB | Carefirst BCBS of Maryland | |
| MUC | Wellmark BCBS | |
| MUD | Carefirst BCBS of Maryland | |
| MUE | Wellmark BCBS | |
| MUF | Anthem BCBS of Wisconsin | |
| MUG | BCBS of Arkansas | |
| MUH | Carefirst BCBS of Maryland | |
| MUI | Unassigned Prefix | |
| MUJ | BCBS of Georgia | |
| MUK | Anthem BCBS of Wisconsin | |
| MUL | BCBS of Illinois | |
| MUM | BCBS of Arizona | |
| MUN | BCBS of Illinois | |
| MUO | Anthem BCBS of Wisconsin | |
| MUP | BCBS of Minnesota | |
| MUQ | Premera Blue Cross | |
| MUR | BCBS of Michigan | |
| MUS | BCBS of Texas | |
| MUT | BCBS of Minnesota | |
| MUU | BCBS of Michigan | |
| MUV | Carefirst BCBS | |
| MUW | Highmark BCBS | |
| MUX | Wellmark BCBS | |
| MUY | BCBS of Alabama | |
| MUZ | BCBS of Michigan | |
| MVA | BCBS of Montana | |
| MVB | BCBS of Vermont | |
| MVC | BCBS of South Carolina | |
| MVD | Premera Blue Cross | |
| MVE | BCBS of Massachusetts | |
| MVF | Empire BCBS of New York | |
| MVG | BCBS of Minnesota | |
| MVH | Unassigned Prefix | |
| MVI | BCBS of Michigan | |
| MVJ | Blue Shield of California | |
| MVK | BCBS of Georgia | |
| MVL | BCBS of Massachusetts | |
| MVM | BCBS of Alabama | |
| MVN | Empire BCBS of New York | |
| MVO | Blue Shield of California | |
| MVP | Carefirst BCBS | |
| MVQ | Blue Cross of Idaho | |
| MVR | Highmark BCBS | |
| MVS | Blue Shield of California | |
| MVT | BCBS of Minnesota | |
| MVU | Anthem BCBS of Ohio | |
| MVV | Wellmark BCBS | |
| MVW | Unassigned Prefix | |
| MVX | BCBS of South Carolina | |
| MVY | Anthem BCBS of Ohio | |
| MVZ | Highmark BCBS | |
| MWA | BCBS of Illinois | |
| MWB | Unassigned Prefix | |
| MWC | Unassigned Prefix | |
| MWD | Carefirst Administrators | |
| MWE | Anthem BCBS of Wisconsin | |
| MWF | BCBS of Illinois | |
| MWG | BCBS of Minnesota | |
| MWH | BCBS of Illinois | |
| MWI | Unassigned Prefix | |
| MWJ | Horizon BCBS of New Jersey | |
| MWK | Horizon BCBS of New Jersey | |
| MWL | BCBS of Illinois | |
| MWM | BCBS of Georgia | |
| MWN | BCBS of Illinois | |
| MWO | Independence Blue Cross | |
| MWP | BCBS of Massachusetts | |
| MWQ | Anthem BCBS of Virginia | |
| MWR | BCBS of Kansas City | |
| MWS | Anthem BCBS of Virginia | |
| MWT | Blue Shield of California | |
| MWU | Anthem BCBS of Wisconsin | |
| MWV | Anthem BCBS of Wisconsin | |
| MWW | Anthem BCBS of Nevada | |
| MWX | BCBS of Alabama | |
| MWY | Unassigned Prefix | |
| MWZ | Independence Blue Cross | |
| MXA | Anthem Blue Cross of California | |
| MXB | Highmark BCBS | |
| MXC | Unassigned Prefix | |
| MXD | BCBS of Texas |
| MXE | BCBS of Texas | |
| MXF | Empire BCBS of New York | |
| MXG | BCBS of Massachusetts | |
| MXH | Carefirst BCBS of Maryland | |
| MXI | Blue Shield of California | |
| MXJ | Anthem BCBS of Virginia | |
| MXK | Capital Blue Cross | |
| MXL | Wellmark BCBS | |
| MXM | Wellmark BCBS | |
| MXN | BCBS of Massachusetts | |
| MXO | Wellmark BCBS | |
| MXP | BCBS of Massachusetts | |
| MXQ | Empire BCBS | |
| MXR | Anthem Blue Cross of California | |
| MXS | Anthem BCBS of Georgia | |
| MXT | Unassigned Prefix | |
| MXU | Anthem BCBS of Connecticut | |
| MXV | Blue Cross of Idaho | |
| MXW | Blue Cross of Idaho | |
| MXX | BCBS of Minnesota | |
| MXY | BCBS of Massachusetts | |
| MXZ | Premera Blue Cross | |
| MYA | Unassigned Prefix | |
| MYB | Regence BCBS of Oregon | |
| MYC | Unassigned Prefix | |
| MYD | BCBS of Massachusetts | |
| MYE | Anthem BCBS of Ohio | |
| MYF | Empire BCBS of New York | |
| MYG | Wellmark BCBS | |
| MYH | BCBS of Massachusetts | |
| MYI | BCBS of Massachusetts | |
| MYJ | Unassigned Prefix | |
| MYK | BCBS of Massachusetts | |
| MYL | BCBS of Massachusetts | |
| MYM | Anthem BCBS of Ohio | |
| MYN | Anthem BCBS of Ohio | |
| MYO | Unassigned Prefix | |
| MYP | BCBS of Georgia | |
| MYQ | BCBS of Massachusetts | |
| MYR | BCBS of Alabama | |
| MYS | BCBS of Massachusetts | |
| MYT | BCBS of Michigan | |
| MYU | BCBS of Massachusetts | |
| MYV | Regence Blue Cross Blue Shield of Utah | |
| MYW | Carefirst BCBS of Maryland | |
| MYX | BCBS of Oklahoma | |
| MYY | Carefirst BCBS of Maryland | |
| MYZ | BCBS of Massachusetts | |
| MZA | Wellmark BCBS | |
| MZB | Highmark BCBS | |
| MZC | BCBS of Rhose Island | |
| MZD | BCBS of Illinois | |
| MZE | BCBS of Massachusetts | |
| MZF | BCBS of Illinois | |
| MZG | BCBS of Illinois | |
| MZH | Unassigned Prefix | |
| MZI | Blue Shield of California | |
| MZJ | BCBS of Massachusetts | |
| MZK | Anthem BCBS of Virginia | |
| MZL | BCBS of Alabama | |
| MZM | BCBS of Minnesota | |
| MZN | BCBS of North Carolina | |
| MZO | BCBS of Michigan | |
| MZP | BCBS of Michigan | |
| MZQ | BCBS of Minnesota | |
| MZR | BCBS of Minnesota | |
| MZS | BCBS of North Carolina | |
| MZT | BCBS of Minnesota | |
| MZU | BCBS of South Carolina | |
| MZV | BCBS of Michigan | |
| MZW | BCBS of Minnesota | |
| MZX | BCBS of Minnesota | |
| MZY | BCBS of Michigan | |
| MZZ | BCBS of Minnesota |