BCBS Alpha numeric Prefix M2A to M9Z list is updated from authorized and trusted resources and based on the latest information.
| BCBS Alpha Numeric Prefix | BCBS Plan Name | Website |
| M2A | No Assigned Prefix | Not Found |
| M2B | No Assigned Prefix | Not Found |
| M2C | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M2D | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M2E | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M2F | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M2G | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M2H | Regence BlueCross BlueShield of Oregon | https://www.regence.com/contact-us |
| M2I | Blue Cross Blue Shield Western New York | https://www.bcbswny.com/ |
| M2J | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M2K | Blue Cross Blue Shield Arizona | https://m.azblue.com/ |
| M2L | Blue Cross Blue Shield Massachusetts | bluecrossma.org |
| M2M | Anthem Blue Cross of California | https://www.anthem.com/ca |
| M2N | Anthem Blue Cross Blue Shield Wisconsin | https://www.anthem.com/contact-us/wisconsin/ |
| M2O | No Assigned Prefix | Not Found |
| M2P | Regence BlueCross BlueShield of Oregon | https://www.regence.com/contact-us |
| M2Q | Anthem Blue Cross Blue Shield Wisconsin | https://www.anthem.com/contact-us/wisconsin/ |
| M2R | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M2S | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M2T | Regence BlueCross BlueShield of Oregon | https://www.regence.com/contact-us |
| M2U | Anthem Blue Cross Blue Shield Wisconsin | https://www.anthem.com/contact-us/wisconsin/ |
| M2V | Blue Cross Blue Shield Arizona | https://m.azblue.com/ |
| M2W | Blue Cross & Blue Shield of Rhode Island | https://www.bcbsri.com/ |
| M2X | Blue-Cross Blue-Shield of Montana | https://www.bcbsmt.com/ |
| M2Y | Regence BlueCross BlueShield of Oregon | https://www.regence.com/contact-us |
| M2Z | Anthem Blue Cross Blue Shield Wisconsin | https://www.anthem.com/contact-us/wisconsin/ |
| M3A | Blue Cross Blue Shield Kansas | https://www.bcbsks.com/ |
| M3B | Blue Cross Blue Shield Western New York | https://www.bcbswny.com/ |
| M3C | Blue Cross & Blue Shield of Rhode Island | https://www.bcbsri.com/ |
| M3D | Regence BlueCross BlueShield of Oregon | https://www.regence.com/contact-us |
| M3E | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M3F | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M3G | Blue Cross & Blue Shield of Rhode Island | https://www.bcbsri.com/ |
| M3H | Blue Cross Blue Shield Minnesota | https://www.bluecrossmn.com/providers |
| M3I | No Assigned Prefix | Not Found |
| M3J | Empire Blue Cross Blue Shield New York | https://www.empireblue.com/ |
| M3K | Anthem Blue Cross Blue Shield Wisconsin | https://www.anthem.com/contact-us/wisconsin/ |
| M3L | Blue Cross Blue Shield Michigan | https://www.bcbsm.com/ |
| M3M | Regence BlueCross BlueShield of Oregon | https://www.regence.com/contact-us |
| M3N | Anthem Blue Cross Blue Shield Maine | https://www.anthem.com/contact-us/maine/ |
| M3O | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M3P | Blue Cross Blue Shield Arizona | https://m.azblue.com/ |
| M3Q | Anthem BCBSD of Ohio | https://www.anthem.com/contact-us/ohio/ |
| M3R | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M3S | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M3T | Anthem Blue Cross Blue Shield Georgia | https://www.anthem.com/contact-us/georgia/ |
| M3U | Anthem Blue Cross Blue Shield Indiana | https://www.anthem.com/contact-us/indiana/ |
| M3V | Blue Cross Blue Shield Arizona | https://m.azblue.com/ |
| M3W | Regence BlueCross BlueShield of Oregon | https://www.regence.com/contact-us |
| M3X | Anthem Blue Cross Blue Shield Wisconsin | https://www.anthem.com/contact-us/wisconsin/ |
| M3Y | Anthem Blue Cross Blue Shield Georgia | https://www.anthem.com/contact-us/georgia/ |
| M3Z | Anthem Blue Cross Blue Shield Georgia | https://www.anthem.com/contact-us/georgia/ |
| M4A | Highmark Blue Cross Blue Shield Pennsylvania | https://www.highmarkbcbs.com/ |
| M4B | Highmark Blue Cross Blue Shield Pennsylvania | https://www.highmarkbcbs.com/ |
| M4C | Anthem Blue Cross Blue Shield Kentucky | https://www.anthem.com/contact-us/kentucky/ |
| M4D | Regence BlueCross BlueShield of Oregon | https://www.regence.com/contact-us |
| M4E | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M4F | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M4G | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M4H | Anthem Blue Cross Blue Shield Missouri | https://www.anthem.com/contact-us/missouri/ |
| M4I | No Assigned Prefix | Not Found |
| M4J | Highmark Blue Cross Blue Shield Pennsylvania | https://www.highmarkbcbs.com/ |
| M4K | Blue Cross Blue Shield Arizona | https://m.azblue.com/ |
| M4L | Highmark Blue Cross Blue Shield Pennsylvania | https://www.highmarkbcbs.com/ |
| M4M | Anthem Blue Cross Blue Shield Missouri | https://www.anthem.com/contact-us/missouri/ |
| M4N | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M4O | No Assigned Prefix | Not Found |
| M4P | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M4Q | Blue Cross Blue Shield Michigan | https://www.bcbsm.com/ |
| M4R | Blue-Shield of Northeastern New York | https://www.bsneny.com/content/neny.html |
| M4S | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M4T | Regence BlueCross BlueShield of Oregon | https://www.regence.com/contact-us |
| M4U | Blue Cross Blue Shield Minnesota | https://www.bluecrossmn.com/providers |
| M4V | Blue-Cross Blue-Shield of North Dakota | https://www.bcbsnd.com/ |
| M4W | Anthem Blue Cross Blue Shield Wisconsin | https://www.anthem.com/contact-us/wisconsin/ |
| M4X | Carefirst Blue Cross Blue-Shield | https://provider.carefirst.com/providers/home.page |
| M4Y | Blue Cross of Idaho | https://www.bcidaho.com/ |
| M4Z | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M5A | Blue Cross Blue Shield Minnesota | https://www.bluecrossmn.com/providers |
| M5B | Anthem BCBSD of Ohio | https://www.anthem.com/contact-us/ohio/ |
| M5C | Anthem Blue Cross Blue Shield Missouri | https://www.anthem.com/contact-us/missouri/ |
| M5D | Anthem Blue Cross Blue Shield Missouri | https://www.anthem.com/contact-us/missouri/ |
| M5E | Anthem Blue Cross Blue Shield Missouri | https://www.anthem.com/contact-us/missouri/ |
| M5F | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M5G | Blue Cross Blue Shield Michigan | https://www.bcbsm.com/ |
| M5H | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M5I | Anthem Blue Cross of California | https://www.anthem.com/ca |
| M5J | Carefirst Blue Cross Blue-Shield | https://provider.carefirst.com/providers/home.page |
| M5K | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M5L | Independence Blue Cross of Pennsylvania | https://www.ibx.com/ |
| M5M | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M5N | Blue Cross Blue Shield Massachusetts | bluecrossma.org |
| M5O | No Assigned Prefix | Not Found |
| M5P | Carefirst Blue Cross Blue-Shield | https://provider.carefirst.com/providers/home.page |
| M5Q | Anthem Blue Cross Blue Shield Georgia | https://www.anthem.com/contact-us/georgia/ |
| M5R | Blue Cross Blue Shield Western New York | https://www.bcbswny.com/ |
| M5S | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M5T | Blue Cross Blue Shield Massachusetts | bluecrossma.org |
| M5U | Anthem Blue Cross of California | https://www.anthem.com/ca |
| M5V | Carefirst Blue Cross Blue-Shield | https://provider.carefirst.com/providers/home.page |
| M5W | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M5X | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M5Y | Blue Cross Blue Shield Oklahoma | https://www.bcbsok.com/ |
| M5Z | Anthem Blue Cross Blue Shield Colorado | https://www.anthem.com/contact-us/colorado/ |
| M6A | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M6B | Anthem Blue Cross Blue Shield New Hampshire | https://www.anthem.com/contact-us/new-hampshire/ |
| M6C | Empire Blue Cross Blue Shield New York | https://www.empireblue.com/ |
| M6D | Carefirst Blue Cross Blue-Shield | https://provider.carefirst.com/providers/home.page |
| M6E | Empire Blue Cross Blue Shield New York | https://www.empireblue.com/ |
| M6F | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M6G | Empire Blue Cross Blue Shield New York | https://www.empireblue.com/ |
| M6H | Empire Blue Cross Blue Shield New York | https://www.empireblue.com/ |
| M6I | No Assigned Prefix | Not Found |
| M6J | Anthem Blue Cross Blue Shield Indiana | https://www.anthem.com/contact-us/indiana/ |
| M6K | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M6L | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M6M | Anthem Blue Cross Blue Shield Kentucky | https://www.anthem.com/contact-us/kentucky/ |
| M6N | Blue Cross Blue Shield Minnesota | https://www.bluecrossmn.com/providers |
| M6O | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M6P | Carefirst Blue Cross Blue-Shield | https://provider.carefirst.com/providers/home.page |
| M6Q | Regence BlueCross BlueShield of Oregon | https://www.regence.com/contact-us |
| M6R | Carefirst Blue Cross Blue-Shield | https://provider.carefirst.com/providers/home.page |
| M6S | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M6T | Carefirst Blue Cross Blue-Shield | https://provider.carefirst.com/providers/home.page |
| M6U | Anthem BCBSD of Ohio | https://www.anthem.com/contact-us/ohio/ |
| M6V | Anthem Blue Cross Blue Shield Nevada | https://www.anthem.com/contact-us/nevada/ |
| M6W | Anthem Blue Cross Blue Shield Wisconsin | https://www.anthem.com/contact-us/wisconsin/ |
| M6X | Anthem Blue Cross Blue Shield Wisconsin | https://www.anthem.com/contact-us/wisconsin/ |
| M6Y | Empire Blue Cross Blue Shield New York | https://www.empireblue.com/ |
| M6Z | Anthem Blue Cross Blue Shield Missouri | https://www.anthem.com/contact-us/missouri/ |
| M7A | Anthem Blue Cross of California | https://www.anthem.com/ca |
| M7B | Premera Blue Cross of Alaska | https://www.premera.com/ak/provider/ |
| M7C | Empire Blue Cross Blue Shield New York | https://www.empireblue.com/ |
| M7D | Blue-Cross Blue-Shield of North Dakota | https://www.bcbsnd.com/ |
| M7E | Anthem Blue Cross of California | https://www.anthem.com/ca |
| M7F | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M7G | Anthem Blue Cross Blue Shield Indiana | https://www.anthem.com/contact-us/indiana/ |
| M7H | Anthem Blue Cross Blue Shield Indiana | https://www.anthem.com/contact-us/indiana/ |
| M7I | No Assigned Prefix | Not Found |
| M7J | Anthem Blue Cross Blue Shield Indiana | https://www.anthem.com/contact-us/indiana/ |
| M7K | Anthem Blue Cross Blue Shield Indiana | https://www.anthem.com/contact-us/indiana/ |
| M7L | Carefirst Blue Cross Blue-Shield | https://provider.carefirst.com/providers/home.page |
| M7M | Anthem Blue Cross Blue Shield Colorado | https://www.anthem.com/contact-us/colorado/ |
| M7N | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M7O | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M7P | Anthem BCBSD of Ohio | https://www.anthem.com/contact-us/ohio/ |
| M7Q | Anthem Blue Cross Blue Shield Georgia | https://www.anthem.com/contact-us/georgia/ |
| M7R | Carefirst Blue Cross Blue-Shield | https://provider.carefirst.com/providers/home.page |
| M7S | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M7T | Anthem Blue Cross of California | https://www.anthem.com/ca |
| M7U | Anthem Blue Cross Blue Shield Indiana | https://www.anthem.com/contact-us/indiana/ |
| M7V | Anthem Blue Cross Blue Shield Missouri | https://www.anthem.com/contact-us/missouri/ |
| M7W | Anthem Blue Cross Blue Shield Indiana | https://www.anthem.com/contact-us/indiana/ |
| M7X | Anthem Blue Cross Blue Shield Kentucky | https://www.anthem.com/contact-us/kentucky/ |
| M7Y | No Assigned Prefix | Not Found |
| M7Z | Anthem Blue Cross Blue Shield Maine | https://www.anthem.com/contact-us/maine/ |
| M8A | Anthem Blue Cross Blue Shield Colorado | https://www.anthem.com/contact-us/colorado/ |
| M8B | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M8C | Carefirst Blue Cross Blue-Shield | https://provider.carefirst.com/providers/home.page |
| M8D | Anthem Blue Cross Blue Shield Maine | https://www.anthem.com/contact-us/maine/ |
| M8E | Anthem Blue Cross Blue Shield Indiana | https://www.anthem.com/contact-us/indiana/ |
| M8F | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M8G | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M8H | Empire Blue Cross Blue Shield New York | https://www.empireblue.com/ |
| M8I | No Assigned Prefix | Not Found |
| M8J | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M8K | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M8L | Anthem Blue Cross of California | https://www.anthem.com/ca |
| M8M | Anthem Blue Cross Blue Shield Indiana | https://www.anthem.com/contact-us/indiana/ |
| M8N | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M8O | No Assigned Prefix | Not Found |
| M8P | Blue Cross Blue Shield Minnesota | https://www.bluecrossmn.com/providers |
| M8Q | Anthem Blue Cross Blue Shield Georgia | https://www.anthem.com/contact-us/georgia/ |
| M8R | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M8S | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M8T | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M8U | Anthem Blue Cross Blue Shield Indiana | https://www.anthem.com/contact-us/indiana/ |
| M8V | Anthem Blue Cross Blue Shield Connecticut | https://www.anthem.com/contact-us/connecticut/ |
| M8W | Anthem Blue Cross Blue Shield Maine | https://www.anthem.com/contact-us/maine/ |
| M8X | Anthem Blue Cross Blue Shield New Hampshire | https://www.anthem.com/contact-us/new-hampshire/ |
| M8Y | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M8Z | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M9A | Empire Blue Cross Blue Shield New York | https://www.empireblue.com/ |
| M9B | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M9C | Empire Blue Cross Blue Shield New York | https://www.empireblue.com/ |
| M9D | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M9E | Anthem Blue Cross Blue Shield Maine | https://www.anthem.com/contact-us/maine/ |
| M9F | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M9G | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M9H | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M9I | No Assigned Prefix | Not Found |
| M9J | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M9K BCBS Prefix | Blue Cross Blue Shield Texas (BCBS Prefix M9K) | https://www.bcbstx.com/ |
| M9L | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M9M | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M9N | Anthem Blue Cross of California | https://www.anthem.com/ca |
| M9O | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M9P | Anthem Blue Cross Blue Shield Indiana | https://www.anthem.com/contact-us/indiana/ |
| M9Q | Anthem Blue Cross Blue Shield Georgia | https://www.anthem.com/contact-us/georgia/ |
| M9R | Anthem Blue Cross of California | https://www.anthem.com/ca |
| M9S | Blue Cross Blue Shield Illinois | https://www.bcbsil.com/ |
| M9T | Blue Cross Blue Shield Texas | https://www.bcbstx.com/ |
| M9U | Anthem Blue Cross Blue Shield Georgia | https://www.anthem.com/contact-us/georgia/ |
| M9V | No Assigned Prefix | Not Found |
| M9W | Anthem Blue Cross Blue Shield Virginia | https://www.anthem.com/contact-us/virginia/ |
| M9X | No Assigned Prefix | Not Found |
| M9Y | No Assigned Prefix | Not Found |
| M9Z | No Assigned Prefix | Not Found |
BCBS Alpha Numeric Prefix Lookup list is updated as per received latest information from authorized sources or websites of BCBS insurance and other reputed online portals. If any discrepancy found please let us know via the contact us page, we are committed to providing correct and genuine information.