| BCBS Prefix List 2024 - Alpha Numeric | State Lookup | BCBS Company |
|---|---|---|
| T2A | New York (Western) | Blue-Cross Blue-Shield of Western New York |
| T2B | Illinois | Blue-Cross Blue-Shield of Illinois |
| T2C | Illinois | Blue-Cross Blue-Shield of Illinois |
| T2D | Texas | Blue-Cross Blue-Shield of Texas |
| T2E | Texas | Blue-Cross Blue-Shield of Texas |
| T2F | Texas | Blue-Cross Blue-Shield of Texas |
| T2G | Texas | Blue-Cross Blue-Shield of Texas |
| T2H | Illinois | Blue-Cross Blue-Shield of Illinois |
| T2I | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| T2J | Texas | Blue-Cross Blue-Shield of Texas |
| T2K | Texas | Blue-Cross Blue-Shield of Texas |
| T2L | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| T2M | California | Anthem Blue-Cross |
| T2N | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| T2O | Kentucky | Anthem Blue-Cross Blue-Shield of Kentucky |
| T2P | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| T2Q | California | Anthem Blue-Cross |
| T2R | Illinois | Blue-Cross Blue-Shield of Illinois |
| T2S | Texas | Blue-Cross Blue-Shield of Texas |
| T2T | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| T2U | Texas | Blue-Cross Blue-Shield of Texas |
| T2V | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| T2W | Illinois | Blue-Cross Blue-Shield of Illinois |
| T2X | Illinois | Blue-Cross Blue-Shield of Illinois |
| T2Y | North Dakota | Blue-Cross Blue-Shield of North Dakota |
| T2Z | Illinois | Blue-Cross Blue-Shield of Illinois |
| T3A | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| T3B | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| T3C | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| T3D | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| T3E | Texas | Blue-Cross Blue-Shield of Texas |
| T3F | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| T3G | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| T3H | Illinois | Blue-Cross Blue-Shield of Illinois |
| T3I | - | Prefix Unallocated/Not Assigned |
| T3J | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| T3K | Texas | Blue-Cross Blue-Shield of Texas |
| T3L | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| T3M | California | Anthem Blue-Cross |
| T3N | California | Anthem Blue-Cross |
| T3O | - | Prefix Unallocated/Not Assigned |
| T3P | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| T3Q | - | Prefix Unallocated/Not Assigned |
| T3R | Texas | Blue-Cross Blue-Shield of Texas |
| T3S | Texas | Blue-Cross Blue-Shield of Texas |
| T3T | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| T3U | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| T3V | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| T3W | Western New York | Highmark Blue-Cross Blue-Shield of Western New York |
| T3X | Texas | Blue-Cross Blue-Shield of Texas |
| T3Y | California | Anthem Blue-Cross |
| T3Z | California | Anthem Blue-Cross |
| T4A | New York | Empire Blue-Cross Blue-Shield of New York |
| T4B | New York | Empire Blue-Cross Blue-Shield of New York |
| T4C | New York | Empire Blue-Cross Blue-Shield of New York |
| T4D | New York | Empire Blue-Cross Blue-Shield of New York |
| T4E | New York | Empire Blue-Cross Blue-Shield of New York |
| T4F | New York | Empire Blue-Cross Blue-Shield of New York |
| T4G | New York | Empire Blue-Cross Blue-Shield of New York |
| T4H | Illinois | Blue-Cross Blue-Shield of Illinois |
| T4I | - | Prefix Unallocated/Not Assigned |
| T4J | New York | Empire Blue-Cross Blue-Shield of New York |
| T4K | New York | Empire Blue-Cross Blue-Shield of New York |
| T4L | New York | Empire Blue-Cross Blue-Shield of New York |
| T4M | New York | Empire Blue-Cross Blue-Shield of New York |
| T4N | New York | Empire Blue-Cross Blue-Shield of New York |
| T4O | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| T4P | Illinois | Blue-Cross Blue-Shield of Illinois |
| T4Q | California | Anthem Blue-Cross |
| T4R | Texas | Blue-Cross Blue-Shield of Texas |
| T4S | New York | Empire Blue-Cross Blue-Shield of New York |
| T4T | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| T4U | New York | Empire Blue-Cross Blue-Shield of New York |
| T4V | New York | Empire Blue-Cross Blue-Shield of New York |
| T4W | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| T4X | California | Anthem Blue-Cross |
| T4Y | California | Anthem Blue-Cross |
| T4Z | - | Prefix Unallocated/Not Assigned |
| T5A | California | Anthem Blue-Cross |
| T5B | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| T5C | California | Anthem Blue-Cross |
| T5D | California | Anthem Blue-Cross |
| T5E | California | Anthem Blue-Cross |
| T5F | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| T5G | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T5H | Illinois | Blue-Cross Blue-Shield of Illinois |
| T5I | - | Prefix Unallocated/Not Assigned |
| T5J | California | Anthem Blue-Cross |
| T5K | California | Anthem Blue-Cross |
| T5L | Illinois | Blue-Cross Blue-Shield of Illinois |
| T5M | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| T5N | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| T5O | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| T5P | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| T5Q | California | Anthem Blue-Cross |
| T5R | Texas | Blue-Cross Blue-Shield of Texas |
| T5S | Texas | Blue-Cross Blue-Shield of Texas |
| T5T | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| T5U | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| T5V | California | Anthem Blue-Cross |
| T5W | California | Anthem Blue-Cross |
| T5X | California | Anthem Blue-Cross |
| T5Y | California | Anthem Blue-Cross |
| T5Z | Texas | Blue-Cross Blue-Shield of Texas |
| T6A | New York | Empire Blue-Cross Blue-Shield of New York |
| T6B | Illinois | Blue-Cross Blue-Shield of Illinois |
| T6C | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| T6D | Pennsylvania | Highmark Blue-Shield of Pennsylvania |
| T6E | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| T6F | Delaware | Highmark Blue-Cross Blue-Shield of Delaware |
| T6G | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| T6H | Illinois | Blue-Cross Blue-Shield of Illinois |
| T6I | - | Prefix Unallocated/Not Assigned |
| T6J | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| T6K | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| T6L | New York | Empire Blue-Cross Blue-Shield of New York |
| T6M | Pennsylvania | Highmark Blue-Shield of Pennsylvania |
| T6N | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| T6O | - | Prefix Unallocated/Not Assigned |
| T6P | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| T6Q | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| T6R | West Virginia | Highmark Blue-Cross Blue-Shield of West Virginia |
| T6S | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| T6T | Michigan | Blue-Cross Blue-Shield of Michigan |
| T6U | Michigan | Blue-Cross Blue-Shield of Michigan |
| T6V | Pennsylvania | Highmark Blue-Shield of Pennsylvania |
| T6W | Pennsylvania | Highmark Blue-Shield of Pennsylvania |
| T6X | Delaware | Highmark Blue-Cross Blue-Shield of Delaware |
| T6Y | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| T6Z | West Virginia | Highmark Blue-Cross Blue-Shield of West Virginia |
| T7A | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T7B | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T7C | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T7D | - | Prefix Unallocated/Not Assigned |
| T7E | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T7F | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T7G | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T7H | Illinois | Blue-Cross Blue-Shield of Illinois |
| T7I | - | Prefix Unallocated/Not Assigned |
| T7J | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T7K | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T7L | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T7M | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| T7N | New York | Empire Blue-Cross Blue-Shield of New York |
| T7O | - | Prefix Unallocated/Not Assigned |
| T7P | - | Prefix Unallocated/Not Assigned |
| T7Q | - | Prefix Unallocated/Not Assigned |
| T7R | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T7S | California | Anthem Blue-Cross |
| T7T | Illinois | Blue-Cross Blue-Shield of Illinois |
| T7U | Illinois | Blue-Cross Blue-Shield of Illinois |
| T7V | - | Prefix Unallocated/Not Assigned |
| T7W | - | Prefix Unallocated/Not Assigned |
| T7X | Illinois | Blue-Cross Blue-Shield of Illinois |
| T7Y | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| T7Z | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| T8A | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| T8B | New York (Northeastern) | Blue-Shield of Northeastern New York |
| T8C | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| T8D | Missouri | Anthem Blue-Cross Blue-Shield of Missouri |
| T8E | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| T8F | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| T8G | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| T8H | Illinois | Blue-Cross Blue-Shield of Illinois |
| T8I | - | Prefix Unallocated/Not Assigned |
| T8J | - | Prefix Unallocated/Not Assigned |
| T8K | - | Prefix Unallocated/Not Assigned |
| T8L | California | Anthem Blue-Cross |
| T8M | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| T8N | Illinois | Blue-Cross Blue-Shield of Illinois |
| T8O | - | Prefix Unallocated/Not Assigned |
| T8P | California | Anthem Blue-Cross |
| T8Q | - | Prefix Unallocated/Not Assigned |
| T8R | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| T8S | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| T8T | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| T8U | - | Prefix Unallocated/Not Assigned |
| T8V | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| T8W | California | Anthem Blue-Cross |
| T8X | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| T8Y | California | Anthem Blue-Cross |
| T8Z | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| T9A | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| T9B | - | Prefix Unallocated/Not Assigned |
| T9C | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| T9D | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| T9E | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T9F | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T9G | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T9H | Illinois | Blue-Cross Blue-Shield of Illinois |
| T9I | - | Prefix Unallocated/Not Assigned |
| T9J | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T9K | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T9L | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T9M | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T9N | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| T9O | - | Prefix Unallocated/Not Assigned |
| T9P | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| T9Q | - | Prefix Unallocated/Not Assigned |
| T9R | New York | Empire Blue-Cross Blue-Shield of New York |
| T9S | Illinois | Blue-Cross Blue-Shield of Illinois |
| T9T | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| T9U | - | Prefix Unallocated/Not Assigned |
| T9V | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| T9W | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| T9X | New York | Empire Blue-Cross Blue-Shield of New York |
| T9Y | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| T9Z | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
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