| BCBS Prefix List 2024 - Alpha Numeric | State Lookup | BCBS Company |
|---|---|---|
| Y2A | Illinois | Blue-Cross Blue-Shield of Illinois |
| Y2B | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| Y2C | California | Anthem Blue-Cross California |
| Y2D | - | Prefix Unallocated/Not Assigned |
| Y2E | - | Prefix Unallocated/Not Assigned |
| Y2F | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| Y2G | - | Prefix Unallocated/Not Assigned |
| Y2H | - | Prefix Unallocated/Not Assigned |
| Y2I | - | Prefix Unallocated/Not Assigned |
| Y2J | - | Prefix Unallocated/Not Assigned |
| Y2K | - | Prefix Unallocated/Not Assigned |
| Y2L | - | Prefix Unallocated/Not Assigned |
| Y2M | Nebraska | Blue-Cross Blue-Shield of Nebraska |
| Y2N | Illinois | Blue-Cross Blue-Shield of Illinois |
| Y2O | - | Prefix Unallocated/Not Assigned |
| Y2P | - | Prefix Unallocated/Not Assigned |
| Y2Q | - | Prefix Unallocated/Not Assigned |
| Y2R | Montana | Blue-Cross Blue-Shield of Montana |
| Y2S | Montana | Blue-Cross Blue-Shield of Montana |
| Y2T | Montana | Blue-Cross Blue-Shield of Montana |
| Y2U | - | Prefix Unallocated/Not Assigned |
| Y2V | - | Prefix Unallocated/Not Assigned |
| Y2W | Illinois | Blue-Cross Blue-Shield of Illinois |
| Y2X | - | Prefix Unallocated/Not Assigned |
| Y2Y | - | Prefix Unallocated/Not Assigned |
| Y2Z | - | Prefix Unallocated/Not Assigned |
| Y3A | - | Prefix Unallocated/Not Assigned |
| Y3B | - | Prefix Unallocated/Not Assigned |
| Y3C | Illinois | Blue-Cross Blue-Shield of Illinois |
| Y3D | - | Prefix Unallocated/Not Assigned |
| Y3E | Alaska | Premera Blue-Cross of Alaska |
| Y3F | - | Prefix Unallocated/Not Assigned |
| Y3G | Alaska | Premera Blue-Cross of Alaska |
| Y3H | - | Prefix Unallocated/Not Assigned |
| Y3I | - | Prefix Unallocated/Not Assigned |
| Y3J | - | Prefix Unallocated/Not Assigned |
| Y3K | Alaska | Premera Blue-Cross of Alaska |
| Y3L | - | Prefix Unallocated/Not Assigned |
| Y3M | California | Anthem Blue-Cross California |
| Y3N | - | Prefix Unallocated/Not Assigned |
| Y3O | - | Prefix Unallocated/Not Assigned |
| Y3P | - | Prefix Unallocated/Not Assigned |
| Y3Q | - | Prefix Unallocated/Not Assigned |
| Y3R | New Mexico | Blue-Cross Blue-Shield of New Mexico |
| Y3S | New Mexico | Blue-Cross Blue-Shield of New Mexico |
| Y3T | New Mexico | Blue-Cross Blue-Shield of New Mexico |
| Y3U | - | Prefix Unallocated/Not Assigned |
| Y3V | - | Prefix Unallocated/Not Assigned |
| Y3W | - | Prefix Unallocated/Not Assigned |
| Y3X | - | Prefix Unallocated/Not Assigned |
| Y3Y | - | Prefix Unallocated/Not Assigned |
| Y3Z | - | Prefix Unallocated/Not Assigned |
| Y4A | - | Prefix Unallocated/Not Assigned |
| Y4B | - | Prefix Unallocated/Not Assigned |
| Y4C | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| Y4D | - | Prefix Unallocated/Not Assigned |
| Y4E | - | Prefix Unallocated/Not Assigned |
| Y4F | - | Prefix Unallocated/Not Assigned |
| Y4G | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| Y4H | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| Y4I | - | Prefix Unallocated/Not Assigned |
| Y4J | - | Prefix Unallocated/Not Assigned |
| Y4K | - | Prefix Unallocated/Not Assigned |
| Y4L | - | Prefix Unallocated/Not Assigned |
| Y4M | - | Prefix Unallocated/Not Assigned |
| Y4N | - | Prefix Unallocated/Not Assigned |
| Y4O | - | Prefix Unallocated/Not Assigned |
| Y4P | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| Y4Q | - | Prefix Unallocated/Not Assigned |
| Y4R | Oklahoma | Blue-Cross Blue-Shield of Oklahoma |
| Y4S | Oklahoma | Blue-Cross Blue-Shield of Oklahoma |
| Y4T | Oklahoma | Blue-Cross Blue-Shield of Oklahoma |
| Y4U | - | Prefix Unallocated/Not Assigned |
| Y4V | - | Prefix Unallocated/Not Assigned |
| Y4W | - | Prefix Unallocated/Not Assigned |
| Y4X | - | Prefix Unallocated/Not Assigned |
| Y4Y | - | Prefix Unallocated/Not Assigned |
| Y4Z | - | Prefix Unallocated/Not Assigned |
| Y5A | - | Prefix Unallocated/Not Assigned |
| Y5B | - | Prefix Unallocated/Not Assigned |
| Y5C | Illinois | Blue-Cross Blue-Shield of Illinois |
| Y5D | - | Prefix Unallocated/Not Assigned |
| Y5E | - | Prefix Unallocated/Not Assigned |
| Y5F | - | Prefix Unallocated/Not Assigned |
| Y5G | - | Prefix Unallocated/Not Assigned |
| Y5H | - | Prefix Unallocated/Not Assigned |
| Y5I | - | Prefix Unallocated/Not Assigned |
| Y5J | - | Prefix Unallocated/Not Assigned |
| Y5K | - | Prefix Unallocated/Not Assigned |
| Y5L | - | Prefix Unallocated/Not Assigned |
| Y5M | - | Prefix Unallocated/Not Assigned |
| Y5N | - | Prefix Unallocated/Not Assigned |
| Y5O | - | Prefix Unallocated/Not Assigned |
| Y5P | - | Prefix Unallocated/Not Assigned |
| Y5Q | - | Prefix Unallocated/Not Assigned |
| Y5R | - | Prefix Unallocated/Not Assigned |
| Y5S | - | Prefix Unallocated/Not Assigned |
| Y5T | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| Y5U | - | Prefix Unallocated/Not Assigned |
| Y5V | - | Prefix Unallocated/Not Assigned |
| Y5W | - | Prefix Unallocated/Not Assigned |
| Y5X | - | Prefix Unallocated/Not Assigned |
| Y5Y | - | Prefix Unallocated/Not Assigned |
| Y5Z | - | Prefix Unallocated/Not Assigned |
| Y6A | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| Y6B | - | Prefix Unallocated/Not Assigned |
| Y6C | - | Prefix Unallocated/Not Assigned |
| Y6D | - | Prefix Unallocated/Not Assigned |
| Y6E | - | Prefix Unallocated/Not Assigned |
| Y6F | - | Prefix Unallocated/Not Assigned |
| Y6G | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| Y6H | - | Prefix Unallocated/Not Assigned |
| Y6I | - | Prefix Unallocated/Not Assigned |
| Y6J | - | Prefix Unallocated/Not Assigned |
| Y6K | - | Prefix Unallocated/Not Assigned |
| Y6L | - | Prefix Unallocated/Not Assigned |
| Y6M | Ohio | Anthem Blue-Cross Blue-Shield of Ohio |
| Y6N | - | Prefix Unallocated/Not Assigned |
| Y6O | - | Prefix Unallocated/Not Assigned |
| Y6P | New York | Empire Blue-Cross Blue-Shield of New York |
| Y6Q | - | Prefix Unallocated/Not Assigned |
| Y6R | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| Y6S | - | Prefix Unallocated/Not Assigned |
| Y6T | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| Y6U | - | Prefix Unallocated/Not Assigned |
| Y6V | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| Y6W | - | Prefix Unallocated/Not Assigned |
| Y6X | - | Prefix Unallocated/Not Assigned |
| Y6Y | - | Prefix Unallocated/Not Assigned |
| Y6Z | - | Prefix Unallocated/Not Assigned |
| Y7A | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| Y7B | - | Prefix Unallocated/Not Assigned |
| Y7C | - | Prefix Unallocated/Not Assigned |
| Y7D | - | Prefix Unallocated/Not Assigned |
| Y7E | - | Prefix Unallocated/Not Assigned |
| Y7F | - | Prefix Unallocated/Not Assigned |
| Y7G | - | Prefix Unallocated/Not Assigned |
| Y7H | - | Prefix Unallocated/Not Assigned |
| Y7I | - | Prefix Unallocated/Not Assigned |
| Y7J | - | Prefix Unallocated/Not Assigned |
| Y7K | - | Prefix Unallocated/Not Assigned |
| Y7L | - | Prefix Unallocated/Not Assigned |
| Y7M | - | Prefix Unallocated/Not Assigned |
| Y7N | New York | Empire Blue-Cross Blue-Shield of New York |
| Y7O | - | Prefix Unallocated/Not Assigned |
| Y7P | - | Prefix Unallocated/Not Assigned |
| Y7Q | - | Prefix Unallocated/Not Assigned |
| Y7R | - | Prefix Unallocated/Not Assigned |
| Y7S | - | Prefix Unallocated/Not Assigned |
| Y7T | - | Prefix Unallocated/Not Assigned |
| Y7U | Oklahoma | Blue-Cross Blue-Shield of Oklahoma |
| Y7V | - | Prefix Unallocated/Not Assigned |
| Y7W | - | Prefix Unallocated/Not Assigned |
| Y7X | - | Prefix Unallocated/Not Assigned |
| Y7Y | - | Prefix Unallocated/Not Assigned |
| Y7Z | - | Prefix Unallocated/Not Assigned |
| Y8A | - | Prefix Unallocated/Not Assigned |
| Y8B | - | Prefix Unallocated/Not Assigned |
| Y8C | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| Y8D | - | Prefix Unallocated/Not Assigned |
| Y8E | New York | Empire Blue-Cross Blue-Shield of New York |
| Y8F | - | Prefix Unallocated/Not Assigned |
| Y8G | - | Prefix Unallocated/Not Assigned |
| Y8H | - | Prefix Unallocated/Not Assigned |
| Y8I | - | Prefix Unallocated/Not Assigned |
| Y8J | - | Prefix Unallocated/Not Assigned |
| Y8K | - | Prefix Unallocated/Not Assigned |
| Y8L | - | Prefix Unallocated/Not Assigned |
| Y8M | California | Anthem Blue-Cross California |
| Y8N | - | Prefix Unallocated/Not Assigned |
| Y8O | - | Prefix Unallocated/Not Assigned |
| Y8P | - | Prefix Unallocated/Not Assigned |
| Y8Q | - | Prefix Unallocated/Not Assigned |
| Y8R | - | Prefix Unallocated/Not Assigned |
| Y8S | - | Prefix Unallocated/Not Assigned |
| Y8T | - | Prefix Unallocated/Not Assigned |
| Y8U | - | Prefix Unallocated/Not Assigned |
| Y8V | - | Prefix Unallocated/Not Assigned |
| Y8W | - | Prefix Unallocated/Not Assigned |
| Y8X | - | Prefix Unallocated/Not Assigned |
| Y8Y | - | Prefix Unallocated/Not Assigned |
| Y8Z | - | Prefix Unallocated/Not Assigned |
| Y9A | - | Prefix Unallocated/Not Assigned |
| Y9B | - | Prefix Unallocated/Not Assigned |
| Y9C | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| Y9D | - | Prefix Unallocated/Not Assigned |
| Y9E | - | Prefix Unallocated/Not Assigned |
| Y9F | - | Prefix Unallocated/Not Assigned |
| Y9G | - | Prefix Unallocated/Not Assigned |
| Y9H | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| Y9I | - | Prefix Unallocated/Not Assigned |
| Y9J | - | Prefix Unallocated/Not Assigned |
| Y9K | - | Prefix Unallocated/Not Assigned |
| Y9L | - | Prefix Unallocated/Not Assigned |
| Y9M | - | Prefix Unallocated/Not Assigned |
| Y9N | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| Y9O | - | Prefix Unallocated/Not Assigned |
| Y9P | - | Prefix Unallocated/Not Assigned |
| Y9Q | - | Prefix Unallocated/Not Assigned |
| Y9R | - | Prefix Unallocated/Not Assigned |
| Y9S | - | Prefix Unallocated/Not Assigned |
| Y9T | - | Prefix Unallocated/Not Assigned |
| Y9U | - | Prefix Unallocated/Not Assigned |
| Y9V | - | Prefix Unallocated/Not Assigned |
| Y9W | - | Prefix Unallocated/Not Assigned |
| Y9X | - | Prefix Unallocated/Not Assigned |
| Y9Y | - | Prefix Unallocated/Not Assigned |
| Y9Z | - | Prefix Unallocated/Not Assigned |
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