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BCBS Alpha Numeric Prefix from M2A to M9Z (UPDATE 2025)
Table of Contents
The Blue Cross Blue Shield (BCBS) member ID prefix is crucial for medical billers, healthcare providers, and patients as it helps in identifying individual BCBS healthcare plans. In this article, we have compiled a comprehensive list of BCBS prefixes from M2A to M9Z, including their respective home plan names and websites. This guide will help you navigate and utilize this information effectively for medical billing purposes.
Also, remember to check the Texmed Billing Solutions for professional assistance in your billing needs.
List of BCBS Alpha Numeric Prefix from M2A to M9Z
| BCBS Alpha Numeric Prefix | BCBS Home Plan Name | State | BCBS Home Plan Website |
|---|---|---|---|
| M2A | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M2B | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M2C | BCBS of Illinois | Illinois | bcbsil.com |
| M2D | BCBS of Illinois | Illinois | bcbsil.com |
| M2E | BCBS of Texas | Texas | bcbstx.com |
| M2F | BCBS of Texas | Texas | bcbstx.com |
| M2G | BCBS of Texas | Texas | bcbstx.com |
| M2H | Regence BlueCross BlueShield of Oregon | Oregon/Idaho/Utah/Washington | regence.com |
| M2I | BCBS of Western New York | New York (Western) | bcbswny.com |
| M2J | BCBS of Illinois | Illinois | bcbsil.com |
| M2K | BCBS of Arizona | Arizona | m.azblue.com |
| M2L | BCBS of Massachusetts | Massachusetts | bluecrossma.org |
| M2M | Anthem Blue Cross of California | California | anthem.com/ca |
| M2N | Anthem BCBS of Wisconsin | Wisconsin | anthem.com/contact-us/wisconsin |
| M2O | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M2P | Regence BlueCross BlueShield of Oregon | Oregon/Idaho/Utah/Washington | regence.com |
| M2Q | Anthem BCBS of Wisconsin | Wisconsin | anthem.com/contact-us/wisconsin |
| M2R | BCBS of Texas | Texas | bcbstx.com |
| M2S | BCBS of Illinois | Illinois | bcbsil.com |
| M2T | Regence BlueCross BlueShield of Oregon | Oregon/Idaho/Utah/Washington | regence.com |
| M2U | Anthem BCBS of Wisconsin | Wisconsin | anthem.com/contact-us/wisconsin |
| M2V | BCBS of Arizona | Arizona | m.azblue.com |
| M2W | Blue Cross & Blue Shield of Rhode Island | Rhode Island | bcbsri.com |
| M2X | Blue-Cross Blue-Shield of Montana | Montana | bcbsmt.com |
| M2Y | Regence BlueCross BlueShield of Oregon | Oregon/Idaho/Utah/Washington | regence.com |
| M2Z | Anthem BCBS of Wisconsin | Wisconsin | anthem.com/contact-us/wisconsin |
| M3A | BCBS of Kansas | Kansas | bcbsks.com |
| M3B | BCBS of Western New York | New York (Western) | bcbswny.com |
| M3C | Blue Cross & Blue Shield of Rhode Island | Rhode Island | bcbsri.com |
| M3D | Regence BlueCross BlueShield of Oregon | Oregon/Idaho/Utah/Washington | regence.com |
| M3E | BCBS of Illinois | Illinois | bcbsil.com |
| M3F | BCBS of Texas | Texas | bcbstx.com |
| M3G | Blue Cross & Blue Shield of Rhode Island | Rhode Island | bcbsri.com |
| M3H | BCBS of Minnesota | Minnesota | bluecrossmn.com |
| M3I | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M3J | Empire BCBS of New York | New York | empireblue.com |
| M3K | Anthem BCBS of Wisconsin | Wisconsin | anthem.com/contact-us/wisconsin |
| M3L | BCBS of Michigan | Michigan | bcbsm.com |
| M3M | Regence BlueCross BlueShield of Oregon | Oregon/Idaho/Utah/Washington | regence.com |
| M3N | Anthem BCBS of Maine | Maine | anthem.com/contact-us/maine |
| M3O | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M3P | BCBS of Arizona | Arizona | m.azblue.com |
| M3Q | Anthem BCBSD of Ohio | Ohio | anthem.com/contact-us/ohio |
| M3R | BCBS of Texas | Texas | bcbstx.com |
| M3S | BCBS of Illinois | Illinois | bcbsil.com |
| M3T | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| M3U | Anthem BCBS of Indiana | Indiana | anthem.com/contact-us/indiana |
| M3V | BCBS of Arizona | Arizona | m.azblue.com |
| M3W | Regence BlueCross BlueShield of Oregon | Oregon/Idaho/Utah/Washington | regence.com |
| M3X | Anthem BCBS of Wisconsin | Wisconsin | anthem.com/contact-us/wisconsin |
| M3Y | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| M3Z | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| M4A | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| M4B | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| M4C | Anthem BCBS of Kentucky | Kentucky | anthem.com/contact-us/kentucky |
| M4D | Regence BlueCross BlueShield of Oregon | Oregon/Idaho/Utah/Washington | regence.com |
| M4E | BCBS of Texas | Texas | bcbstx.com |
| M4F | BCBS of Texas | Texas | bcbstx.com |
| M4G | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M4H | Anthem BCBS of Missouri | Missouri | anthem.com/contact-us/missouri |
| M4I | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M4J | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| M4K | BCBS of Arizona | Arizona | m.azblue.com |
| M4L | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| M4M | Anthem BCBS of Missouri | Missouri | anthem.com/contact-us/missouri |
| M4N | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M4O | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M4P | BCBS of Texas | Texas | bcbstx.com |
| M4Q | BCBS of Michigan | Michigan | bcbsm.com |
| M4R | Blue-Shield of Northeastern New York | New York (Northeastern) | bsneny.com |
| M4S | BCBS of Illinois | Illinois | bcbsil.com |
| M4T | Regence BlueCross BlueShield of Oregon | Oregon/Idaho/Utah/Washington | regence.com |
| M4U | BCBS of Minnesota | Minnesota | bluecrossmn.com |
| M4V | Blue-Cross Blue-Shield of North Dakota | North Dakota | bcbsnd.com |
| M4W | Anthem BCBS of Wisconsin | Wisconsin | anthem.com/contact-us/wisconsin |
| M4X | Carefirst Blue Cross Blue Shield | Maryland/District of Columbia/Northern Virginia | carefirst.com |
| M4Y | Blue Cross of Idaho | Idaho | bcidaho.com |
| M4Z | BCBS of Texas | Texas | bcbstx.com |
| M5A | BCBS of Minnesota | Minnesota | bluecrossmn.com |
| M5B | Anthem BCBSD of Ohio | Ohio | anthem.com/contact-us/ohio |
| M5C | Anthem BCBS of Missouri | Missouri | anthem.com/contact-us/missouri |
| M5D | Anthem BCBS of Missouri | Missouri | anthem.com/contact-us/missouri |
| M5E | Anthem BCBS of Missouri | Missouri | anthem.com/contact-us/missouri |
| M5F | BCBS of Texas | Texas | bcbstx.com |
| M5G | BCBS of Michigan | Michigan | bcbsm.com |
| M5H | BCBS of Texas | Texas | bcbstx.com |
| M5I | Anthem Blue Cross of California | California | anthem.com/ca |
| M5J | Carefirst Blue Cross Blue Shield | Maryland/District of Columbia/Northern Virginia | carefirst.com |
| M5K | BCBS of Illinois | Illinois | bcbsil.com |
| M5L | Independence Blue Cross of Pennsylvania | Pennsylvania | ibx.com |
| M5M | BCBS of Texas | Texas | bcbstx.com |
| M5N | BCBS of Massachusetts | Massachusetts | bluecrossma.org |
| M5O | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M5P | Carefirst Blue Cross Blue Shield | Maryland/District of Columbia/Northern Virginia | carefirst.com |
| M5Q | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| M5R | BCBS of Western New York | New York (Western) | bcbswny.com |
| M5S | BCBS of Texas | Texas | bcbstx.com |
| M5T | BCBS of Massachusetts | Massachusetts | bluecrossma.org |
| M5U | Anthem Blue Cross of California | California | anthem.com/ca |
| M5V | Carefirst Blue Cross Blue Shield | Maryland/District of Columbia/Northern Virginia | carefirst.com |
| M5W | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M5X | BCBS of Illinois | Illinois | bcbsil.com |
| M5Y | BCBS of Oklahoma | Oklahoma | bcbsok.com |
| M5Z | Anthem BCBS of Colorado | Colorado | anthem.com/contact-us/colorado |
| M6A | BCBS of Texas | Texas | bcbstx.com |
| M6B | Anthem BCBS of New Hampshire | New Hampshire | anthem.com/contact-us/new-hampshire |
| M6C | Empire BCBS of New York | New York | empireblue.com |
| M6D | Carefirst Blue Cross Blue Shield | Maryland/District of Columbia/Northern Virginia | carefirst.com |
| M6E | Empire BCBS of New York | New York | empireblue.com |
| M6F | BCBS of Texas | Texas | bcbstx.com |
| M6G | Empire BCBS of New York | New York | empireblue.com |
| M6H | Empire BCBS of New York | New York | empireblue.com |
| M6I | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M6J | Anthem BCBS of Indiana | Indiana | anthem.com/contact-us/indiana |
| M6K | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M6L | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M6M | Anthem BCBS of Kentucky | Kentucky | anthem.com/contact-us/kentucky |
| M6N | BCBS of Minnesota | Minnesota | bluecrossmn.com |
| M6O | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M6P | Carefirst Blue Cross Blue Shield | Maryland/District of Columbia/Northern Virginia | carefirst.com |
| M6Q | Regence BlueCross BlueShield of Oregon | Oregon/Idaho/Utah/Washington | regence.com |
| M6R | Carefirst Blue Cross Blue Shield | Maryland/District of Columbia/Northern Virginia | carefirst.com |
| M6S | BCBS of Illinois | Illinois | bcbsil.com |
| M6T | Carefirst Blue Cross Blue Shield | Maryland/District of Columbia/Northern Virginia | carefirst.com |
| M6U | Anthem BCBSD of Ohio | Ohio | anthem.com/contact-us/ohio |
| M6V | Anthem BCBS of Nevada | Nevada | anthem.com/contact-us/nevada |
| M6W | Anthem BCBS of Wisconsin | Wisconsin | anthem.com/contact-us/wisconsin |
| M6X | Anthem BCBS of Wisconsin | Wisconsin | anthem.com/contact-us/wisconsin |
| M6Y | Empire BCBS of New York | New York | empireblue.com |
| M6Z | Anthem BCBS of Missouri | Missouri | anthem.com/contact-us/missouri |
| M7A | Anthem Blue Cross of California | California | anthem.com/ca |
| M7B | Premera Blue Cross of Alaska | Alaska | premera.com |
| M7C | Empire BCBS of New York | New York | empireblue.com |
| M7D | Blue-Cross Blue-Shield of North Dakota | North Dakota | bcbsnd.com |
| M7E | Anthem Blue Cross of California | California | anthem.com/ca |
| M7F | BCBS of Texas | Texas | bcbstx.com |
| M7G | Anthem BCBS of Indiana | Indiana | anthem.com/contact-us/indiana |
| M7H | Anthem BCBS of Indiana | Indiana | anthem.com/contact-us/indiana |
| M7I | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M7J | Anthem BCBS of Indiana | Indiana | anthem.com/contact-us/indiana |
| M7K | Anthem BCBS of Indiana | Indiana | anthem.com/contact-us/indiana |
| M7L | Carefirst Blue Cross Blue Shield | Maryland/District of Columbia/Northern Virginia | carefirst.com |
| M7M | Anthem BCBS of Colorado | Colorado | anthem.com/contact-us/colorado |
| M7N | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M7O | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M7P | Anthem BCBSD of Ohio | Ohio | anthem.com/contact-us/ohio |
| M7Q | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| M7R | Carefirst Blue Cross Blue Shield | Maryland/District of Columbia/Northern Virginia | carefirst.com |
| M7S | BCBS of Illinois | Illinois | bcbsil.com |
| M7T | Anthem Blue Cross of California | California | anthem.com/ca |
| M7U | Anthem BCBS of Indiana | Indiana | anthem.com/contact-us/indiana |
| M7V | Anthem BCBS of Missouri | Missouri | anthem.com/contact-us/missouri |
| M7W | Anthem BCBS of Indiana | Indiana | anthem.com/contact-us/indiana |
| M7X | Anthem BCBS of Kentucky | Kentucky | anthem.com/contact-us/kentucky |
| M7Y | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M7Z | Anthem BCBS of Maine | Maine | anthem.com/contact-us/maine |
| M8A | Anthem BCBS of Colorado | Colorado | anthem.com/contact-us/colorado |
| M8B | BCBS of Illinois | Illinois | bcbsil.com |
| M8C | Carefirst Blue Cross Blue Shield | Maryland/District of Columbia/Northern Virginia | carefirst.com |
| M8D | Anthem BCBS of Maine | Maine | anthem.com/contact-us/maine |
| M8E | Anthem BCBS of Indiana | Indiana | anthem.com/contact-us/indiana |
| M8F | BCBS of Texas | Texas | bcbstx.com |
| M8G | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M8H | Empire BCBS of New York | New York | empireblue.com |
| M8I | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M8J | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M8K | BCBS of Texas | Texas | bcbstx.com |
| M8L | Anthem Blue Cross of California | California | anthem.com/ca |
| M8M | Anthem BCBS of Indiana | Indiana | anthem.com/contact-us/indiana |
| M8N | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M8O | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M8P | BCBS of Minnesota | Minnesota | bluecrossmn.com |
| M8Q | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| M8R | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M8S | BCBS of Illinois | Illinois | bcbsil.com |
| M8T | BCBS of Illinois | Illinois | bcbsil.com |
| M8U | Anthem BCBS of Indiana | Indiana | anthem.com/contact-us/indiana |
| M8V | Anthem BCBS of Connecticut | Connecticut | anthem.com/contact-us/connecticut |
| M8W | Anthem BCBS of Maine | Maine | anthem.com/contact-us/maine |
| M8X | Anthem BCBS of New Hampshire | New Hampshire | anthem.com/contact-us/new-hampshire |
| M8Y | BCBS of Texas | Texas | bcbstx.com |
| M8Z | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M9A | Empire BCBS of New York | New York | empireblue.com |
| M9B | BCBS of Illinois | Illinois | bcbsil.com |
| M9C | Empire BCBS of New York | New York | empireblue.com |
| M9D | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M9E | Anthem BCBS of Maine | Maine | anthem.com/contact-us/maine |
| M9F | BCBS of Texas | Texas | bcbstx.com |
| M9G | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M9H | BCBS of Illinois | Illinois | bcbsil.com |
| M9I | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M9J | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M9K | BCBS of Texas | Texas | bcbstx.com |
| M9L | BCBS of Texas | Texas | bcbstx.com |
| M9M | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M9N | Anthem Blue Cross of California | California | anthem.com/ca |
| M9O | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M9P | Anthem BCBS of Indiana | Indiana | anthem.com/contact-us/indiana |
| M9Q | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| M9R | Anthem Blue Cross of California | California | anthem.com/ca |
| M9S | BCBS of Illinois | Illinois | bcbsil.com |
| M9T | BCBS of Texas | Texas | bcbstx.com |
| M9U | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| M9V | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M9W | Anthem BCBS of Virginia | Virginia | anthem.com/contact-us/virginia |
| M9X | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M9Y | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| M9Z | Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
Conclusion
Understanding BCBS prefixes is crucial for effective communication with insurance companies and for smooth medical billing processes. For further assistance and specialized medical billing solutions, feel free to reach out to Texmed Billing Solutions.