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BCBS Prefix List M2A to M9Z

BCBS Prefix List 2024 - Alpha Numeric	State Lookup	BCBS Company
M2A	-	Unallocated/Not Assigned
M2B	-	Unallocated/Not Assigned
M2C	Illinois	Blue-Cross Blue-Shield of Illinois
M2D	Illinois	Blue-Cross Blue-Shield of Illinois
M2E	Texas	Blue-Cross Blue-Shield of Texas
M2F	Texas	Blue-Cross Blue-Shield of Texas
M2G	Texas	Blue-Cross Blue-Shield of Texas
M2H	Oregon/Idaho/Utah/Washington	Regence Blue-Cross Blue-Shield
M2I	New York (Western)	Blue-Cross Blue-Shield of Western New York
M2J	Illinois	Blue-Cross Blue-Shield of Illinois
M2K	Arizona	Blue-Cross Blue-Shield of Arizona
M2L	Massachusetts	Blue-Cross Blue-Shield of Massachusetts
M2M	California	Anthem Blue-Cross
M2N	Wisconsin	Anthem Blue-Cross Blue-Shield of Wisconsin
M2O	-	Unallocated/Not Assigned
M2P	Oregon/Idaho/Utah/Washington	Regence Blue-Cross Blue-Shield
M2Q	Wisconsin	Anthem Blue-Cross Blue-Shield of Wisconsin
M2R	Texas	Blue-Cross Blue-Shield of Texas
M2S	Illinois	Blue-Cross Blue-Shield of Illinois
M2T	Oregon/Idaho/Utah/Washington	Regence Blue-Cross Blue-Shield
M2U	Wisconsin	Anthem Blue-Cross Blue-Shield of Wisconsin
M2V	Arizona	Blue-Cross Blue-Shield of Arizona
M2W	Rhode Island	Blue-Cross Blue-Shield of Rhode Island
M2X	Montana	Blue-Cross Blue-Shield of Montana
M2Y	Oregon/Idaho/Utah/Washington	Regence Blue-Cross Blue-Shield
M2Z	Wisconsin	Anthem Blue-Cross Blue-Shield of Wisconsin
M3A	Kansas	Blue-Cross Blue-Shield of Kansas
M3B	New York (Western)	Blue-Cross Blue-Shield of Western New York
M3C	Rhode Island	Blue-Cross Blue-Shield of Rhode Island
M3D	Oregon/Idaho/Utah/Washington	Regence Blue-Cross Blue-Shield
M3E	Illinois	Blue-Cross Blue-Shield of Illinois
M3F	Texas	Blue-Cross Blue-Shield of Texas
M3G	Rhode Island	Blue-Cross Blue-Shield of Rhode Island
M3H	Minnesota	Blue-Cross Blue-Shield of Minnesota
M3I	-	Unallocated/Not Assigned
M3J	New York	Empire Blue-Cross Blue-Shield of New York
M3K	Wisconsin	Anthem Blue-Cross Blue-Shield of Wisconsin
M3L	Michigan	Blue-Cross Blue-Shield of Michigan
M3M	Oregon/Idaho/Utah/Washington	Regence Blue-Cross Blue-Shield
M3N	Maine	Anthem Blue-Cross Blue-Shield of Maine
M3O	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M3P	Arizona	Blue-Cross Blue-Shield of Arizona
M3Q	Ohio	Anthem Blue-Cross Blue-Shield of Ohio
M3R	Texas	Blue-Cross Blue-Shield of Texas
M3S	Illinois	Blue-Cross Blue-Shield of Illinois
M3T	Georgia	Anthem Blue-Cross Blue-Shield of Georgia
M3U	Indiana	Anthem Blue-Cross Blue-Shield of Indiana
M3V	Arizona	Blue-Cross Blue-Shield of Arizona
M3W	Oregon/Idaho/Utah/Washington	Regence Blue-Cross Blue-Shield
M3X	Wisconsin	Anthem Blue-Cross Blue-Shield of Wisconsin
M3Y	Georgia	Anthem Blue-Cross Blue-Shield of Georgia
M3Z	Georgia	Anthem Blue-Cross Blue-Shield of Georgia
M4A	Pennsylvania	Highmark Blue-Cross Blue-Shield of Pennsylvania
M4B	Pennsylvania	Highmark Blue-Shield of Pennsylvania
M4C	Kentucky	Anthem Blue-Cross Blue-Shield of Kentucky
M4D	Oregon/Idaho/Utah/Washington	Regence Blue-Cross Blue-Shield
M4E	Texas	Blue-Cross Blue-Shield of Texas
M4F	Texas	Blue-Cross Blue-Shield of Texas
M4G	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M4H	Missouri	Anthem Blue-Cross Blue-Shield of Missouri
M4I	-	Unallocated/Not Assigned
M4J	Pennsylvania	Highmark Blue-Cross Blue-Shield of Pennsylvania
M4K	Arizona	Blue-Cross Blue-Shield of Arizona
M4L	Pennsylvania	Highmark Blue-Cross Blue-Shield of Pennsylvania
M4M	Missouri	Anthem Blue-Cross Blue-Shield of Missouri
M4N	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M4O	-	Unallocated/Not Assigned
M4P	Texas	Blue-Cross Blue-Shield of Texas
M4Q	Michigan	Blue-Cross Blue-Shield of Michigan
M4R	New York (Northeastern)	Blue-Shield of Northeastern New York
M4S	Illinois	Blue-Cross Blue-Shield of Illinois
M4T	Oregon/Idaho/Utah/Washington	Regence Blue-Cross Blue-Shield
M4U	Minnesota	Blue-Cross Blue-Shield of Minnesota
M4V	North Dakota	Blue-Cross Blue-Shield of North Dakota
M4W	Wisconsin	Anthem Blue-Cross Blue-Shield of Wisconsin
M4X	Maryland/District of Columbia/Northern Virginia	Carefirst Blue-Cross Blue-Shield
M4Y	Idaho	Blue-Cross of Idaho
M4Z	Texas	Blue-Cross Blue-Shield of Texas
M5A	Minnesota	Blue-Cross Blue-Shield of Minnesota
M5B	Ohio	Anthem Blue-Cross Blue-Shield of Ohio
M5C	Missouri	Anthem Blue-Cross Blue-Shield of Missouri
M5D	Missouri	Anthem Blue-Cross Blue-Shield of Missouri
M5E	Missouri	Anthem Blue-Cross Blue-Shield of Missouri
M5F	Texas	Blue-Cross Blue-Shield of Texas
M5G	Michigan	Blue-Cross Blue-Shield of Michigan
M5H	Texas	Blue-Cross Blue-Shield of Texas
M5I	California	Anthem Blue-Cross
M5J	Maryland/District of Columbia/Northern Virginia	Carefirst Blue-Cross Blue-Shield
M5K	Illinois	Blue-Cross Blue-Shield of Illinois
M5L	Pennsylvania	Independence Blue-Cross of Pennsylvania
M5M	Texas	Blue-Cross Blue-Shield of Texas
M5N	Massachusetts	Blue-Cross Blue-Shield of Massachusetts
M5O	-	Unallocated/Not Assigned
M5P	Maryland/District of Columbia/Northern Virginia	Carefirst Blue-Cross Blue-Shield
M5Q	Georgia	Anthem Blue-Cross Blue-Shield of Georgia
M5R	New York (Western)	Blue-Cross Blue-Shield of Western New York
M5S	Texas	Blue-Cross Blue-Shield of Texas
M5T	Massachusetts	Blue-Cross Blue-Shield of Massachusetts
M5U	California	Anthem Blue-Cross
M5V	Maryland/District of Columbia/Northern Virginia	Carefirst Blue-Cross Blue-Shield
M5W	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M5X	Illinois	Blue-Cross Blue-Shield of Illinois
M5Y	Oklahoma	Blue-Cross Blue-Shield of Oklahoma
M5Z	Colorado	Anthem Blue-Cross Blue-Shield of Colorado
M6A	Texas	Blue-Cross Blue-Shield of Texas
M6B	New Hampshire	Anthem Blue-Cross Blue-Shield of New Hampshire
M6C	New York	Empire Blue-Cross Blue-Shield of New York
M6D	Maryland/District of Columbia/Northern Virginia	Carefirst Blue-Cross Blue-Shield
M6E	New York	Empire Blue-Cross Blue-Shield of New York
M6F	Texas	Blue-Cross Blue-Shield of Texas
M6G	New York	Empire Blue-Cross Blue-Shield of New York
M6H	New York	Empire Blue-Cross Blue-Shield of New York
M6I	-	Unallocated/Not Assigned
M6J	Indiana	Anthem Blue-Cross Blue-Shield of Indiana
M6K	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M6L	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M6M	Kentucky	Anthem Blue-Cross Blue-Shield of Kentucky
M6N	Minnesota	Blue-Cross Blue-Shield of Minnesota
M6O	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M6P	Maryland/District of Columbia/Northern Virginia	Carefirst Blue-Cross Blue-Shield
M6Q	Oregon/Idaho/Utah/Washington	Regence Blue-Cross Blue-Shield
M6R	Maryland/District of Columbia/Northern Virginia	Carefirst Blue-Cross Blue-Shield
M6S	Illinois	Blue-Cross Blue-Shield of Illinois
M6T	Maryland/District of Columbia/Northern Virginia	Carefirst Blue-Cross Blue-Shield
M6U	Ohio	Anthem Blue-Cross Blue-Shield of Ohio
M6V	Nevada	Anthem Blue-Cross Blue-Shield of Nevada
M6W	Wisconsin	Anthem Blue-Cross Blue-Shield of Wisconsin
M6X	Wisconsin	Anthem Blue-Cross Blue-Shield of Wisconsin
M6Y	New York	Empire Blue-Cross Blue-Shield of New York
M6Z	Missouri	Anthem Blue-Cross Blue-Shield of Missouri
M7A	California	Anthem Blue-Cross
M7B	Alaska	Premera Blue-Cross Blue-Shield of Alaska
M7C	New York	Empire Blue-Cross Blue-Shield of New York
M7D	North Dakota	Blue-Cross Blue-Shield of North Dakota
M7E	California	Anthem Blue-Cross
M7F	Texas	Blue-Cross Blue-Shield of Texas
M7G	Indiana	Anthem Blue-Cross Blue-Shield of Indiana
M7H	Indiana	Anthem Blue-Cross Blue-Shield of Indiana
M7I	-	Unallocated/Not Assigned
M7J	Indiana	Anthem Blue-Cross Blue-Shield of Indiana
M7K	Indiana	Anthem Blue-Cross Blue-Shield of Indiana
M7L	Maryland/District of Columbia/Northern Virginia	Carefirst Blue-Cross Blue-Shield
M7M	Colorado	Anthem Blue-Cross Blue-Shield of Colorado
M7N	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M7O	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M7P	Ohio	Anthem Blue-Cross Blue-Shield of Ohio
M7Q	Georgia	Anthem Blue-Cross Blue-Shield of Georgia
M7R	Maryland/District of Columbia/Northern Virginia	Carefirst Blue-Cross Blue-Shield
M7S	Illinois	Blue-Cross Blue-Shield of Illinois
M7T	California	Anthem Blue-Cross
M7U	Indiana	Anthem Blue-Cross Blue-Shield of Indiana
M7V	Missouri	Anthem Blue-Cross Blue-Shield of Missouri
M7W	Indiana	Anthem Blue-Cross Blue-Shield of Indiana
M7X	Kentucky	Anthem Blue-Cross Blue-Shield of Kentucky
M7Y	-	Unallocated/Not Assigned
M7Z	Maine	Anthem Blue-Cross Blue-Shield of Maine
M8A	Colorado	Anthem Blue-Cross Blue-Shield of Colorado
M8B	Illinois	Blue-Cross Blue-Shield of Illinois
M8C	Maryland/District of Columbia/Northern Virginia	Carefirst Blue-Cross Blue-Shield
M8D	Maine	Anthem Blue-Cross Blue-Shield of Maine
M8E	Indiana	Anthem Blue-Cross Blue-Shield of Indiana
M8F	Texas	Blue-Cross Blue-Shield of Texas
M8G	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M8H	New York	Empire Blue-Cross Blue-Shield of New York
M8I	-	Unallocated/Not Assigned
M8J	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M8K	Texas	Blue-Cross Blue-Shield of Texas
M8L	California	Anthem Blue-Cross
M8M	Indiana	Anthem Blue-Cross Blue-Shield of Indiana
M8N	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M8O	-	Unallocated/Not Assigned
M8P	Minnesota	Blue-Cross Blue-Shield of Minnesota
M8Q	Georgia	Anthem Blue-Cross Blue-Shield of Georgia
M8R	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M8S	Illinois	Blue-Cross Blue-Shield of Illinois
M8T	Illinois	Blue-Cross Blue-Shield of Illinois
M8U	Indiana	Anthem Blue-Cross Blue-Shield of Indiana
M8V	Connecticut	Anthem Blue-Cross Blue-Shield of Connecticut
M8W	Maine	Anthem Blue-Cross Blue-Shield of Maine
M8X	New Hampshire	Anthem Blue-Cross Blue-Shield of New Hampshire
M8Y	Texas	Blue-Cross Blue-Shield of Texas
M8Z	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M9A	New York	Empire Blue-Cross Blue-Shield of New York
M9B	Illinois	Blue-Cross Blue-Shield of Illinois
M9C	New York	Empire Blue-Cross Blue-Shield of New York
M9D	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M9E	Maine	Anthem Blue-Cross Blue-Shield of Maine
M9F	Texas	Blue-Cross Blue-Shield of Texas
M9G	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M9H	Illinois	Blue-Cross Blue-Shield of Illinois
M9I	-	Unallocated/Not Assigned
M9J	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M9K	Texas	Blue-Cross Blue-Shield of Texas
M9L	Texas	Blue-Cross Blue-Shield of Texas
M9M	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M9N	California	Anthem Blue-Cross
M9O	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M9P	Indiana	Anthem Blue-Cross Blue-Shield of Indiana
M9Q	Georgia	Anthem Blue-Cross Blue-Shield of Georgia
M9R	California	Anthem Blue-Cross
M9S	Illinois	Blue-Cross Blue-Shield of Illinois
M9T	Texas	Blue-Cross Blue-Shield of Texas
M9U	Georgia	Anthem Blue-Cross Blue-Shield of Georgia
M9V	-	Unallocated/Not Assigned
M9W	Virginia	Anthem Blue-Cross Blue-Shield of Virginia
M9X	-	Couple Health
M9Y	-	Couple Health
M9Z	-	Couple Health

BCBS Prefix List M2A to M9Z

Blue Cross Blue Shield Provider Phone Number

Blue Cross Blue Shield Federal Phone Number