| B2A | Anthem Blue Cross of California |
| B2B | Blue Cross of Massachusetts |
| B2C | Blue Cross Blue Shield of Texas |
| B2D | Regence Blue Cross Blue Shield |
| B2E | Highmark Blue Shield |
| B2F | Blue Cross Blue Shield of Texas |
| B2G | Blue Cross Blue Shield of Western New York |
| B2H | Blue Cross of Massachusetts |
| B2I | Unassigned Prefix |
| B2J | Blue Cross Blue Shield of Illinois |
| B2K | Carefirst Blue Cross Blue Shield |
| B2L | Highmark Blue Cross Blue Shield of Delaware |
| B2M | Carefirst Blue Cross Blue Shield |
| B2N | Blue Shield of Northeastern New York |
| B2O | Blue Cross of Massachusetts |
| B2P | Carefirst Blue Cross Blue Shield |
| B2Q | Carefirst Blue Cross Blue Shield |
| B2R | Arkansas Blue Cross |
| B2S | Regence Blue Cross Blue Shield |
| B2T | Carefirst Blue Cross Blue Shield |
| B2U | Carefirst Blue Cross Blue Shield |
| B2V | Carefirst Blue Cross Blue Shield |
| B2W | Blue Cross Blue Shield of Western New York |
| B2X | Blue Cross Blue Shield of Illinois |
| B2Y | Carefirst Blue Cross Blue Shield |
| B2Z | Carefirst Blue Cross Blue Shield |
| B3A | Carefirst Blue Cross Blue Shield |
| B3B | Empire Blue Cross Blue Shield |
| B3C | Carefirst Blue Cross Blue Shield |
| B3D | Regence Blue Cross Blue Shield |
| B3E | Blue Cross Blue Shield of Texas |
| B3F | Anthem Blue Cross of California |
| B3G | Empire Blue Cross Blue Shield |
| B3H | Empire Blue Cross Blue Shield |
| B3I | Empire Blue Cross Blue Shield |
| B3J | Premera Blue Cross |
| B3K | Empire Blue Cross Blue Shield |
| B3L | Highmark Blue Cross Blue Shield |
| B3M | Carefirst Blue Cross Blue Shield |
| B3N | Empire Blue Cross Blue Shield |
| B3O | Empire Blue Cross Blue Shield |
| B3P | Blue Cross Blue Shield of Texas |
| B3Q | Empire Blue Cross Blue Shield |
| B3R | Empire Blue Cross Blue Shield |
| B3S | Carefirst Blue Cross Blue Shield |
| B3T | Empire Blue Cross Blue Shield |
| B3U | Empire Blue Cross Blue Shield |
| B3V | Carefirst Blue Cross Blue Shield |
| B3W | Empire Blue Cross Blue Shield |
| B3X | Empire Blue Cross Blue Shield |
| B3Y | Empire Blue Cross Blue Shield |
| B3Z | Empire Blue Cross Blue Shield |
| B4A | Anthem Blue Cross of California |
| B4B | Highmark Blue Shield |
| B4C | Highmark Blue Shield |
| B4D | Highmark Blue Shield |
| B4E | Highmark Blue Shield |
| B4F | Highmark Blue Cross Blue Shield |
| B4G | Highmark Blue Cross Blue Shield of Delaware |
| B4H | Highmark Blue Cross Blue Shield |
| B4I | Carefirst Blue Cross Blue Shield |
| B4J | Carefirst Blue Cross Blue Shield |
| B4K | Anthem Blue Cross of California |
| B4L | Carefirst Blue Cross Blue Shield |
| B4M | Highmark Blue Cross Blue Shield of Delaware |
| B4N | Carefirst Blue Cross Blue Shield |
| B4O | Carefirst Blue Cross Blue Shield |
| B4P | Capital Blue Cross |
| B4Q | Carefirst Blue Cross Blue Shield |
| B4R | Highmark Blue Shield |
| B4S | Blue Cross Blue Shield of Texas |
| B4T | Highmark Blue Cross Blue Shield |
| B4U | Empire Blue Cross Blue Shield of New York |
| B4V | Blue Cross Blue Shield of Texas |
| B4W | Blue Cross of Massachusetts |
| B4X | Carefirst Blue Cross Blue Shield |
| B4Y | Carefirst Blue Cross Blue Shield |
| B4Z | Carefirst Blue Cross Blue Shield |
| B5A | Anthem Blue Cross of California |
| B5B | Highmark Blue Cross Blue Shield |
| B5C | Blue Cross Blue Shield of Rhode Island |
| B5D | Anthem Blue Cross Blue Shield of Nevada |
| B5E | Capital Blue Cross |
| B5F | Highmark Blue Cross Blue Shield of Delaware |
| B5G | Carefirst Blue Cross Blue Shield |
| B5H | Horizon Blue Cross Blue Shield |
| B5I | Independence Blue Cross |
| B5J | Horizon Blue Cross Blue Shield |
| B5K | Carefirst Blue Cross Blue Shield |
| B5L | Empire Blue Cross Blue Shield |
| B5M | Carefirst Blue Cross Blue Shield |
| B5N | Carefirst Blue Cross Blue Shield |
| B5O | Premera Blue Cross Blue Shield of Alaska |
| B5P | Carefirst Blue Cross Blue Shield |
| B5Q | Carefirst Blue Cross Blue Shield |
| B5R | Carefirst Blue Cross Blue Shield |
| B5S | Blue Cross Blue Shield of Texas |
| B5T | Horizon Blue Cross Blue Shield |
| B5U | Carefirst Blue Cross Blue Shield |
| B5V | Horizon Blue Cross Blue Shield |
| B5W | Carefirst Blue Cross Blue Shield |
| B5X | Anthem Blue Cross Blue Shield of Ohio |
| B5Y | Anthem Blue Cross Blue Shield of Ohio |
| B5Z | Anthem Blue Cross Blue Shield of Ohio |
| B6A | Blue Cross of Massachusetts |
| B6B | Anthem Blue Cross Blue Shield of Ohio |
| B6C | Anthem Blue Cross Blue Shield of Ohio |
| B6D | Anthem Blue Cross Blue Shield of Ohio |
| B6E | Anthem Blue Cross Blue Shield of Ohio |
| B6F | Anthem Blue Cross Blue Shield of Ohio |
| B6G | Anthem Blue Cross Blue Shield of Ohio |
| B6H | Empire Blue Cross Blue Shield |
| B6I | Empire Blue Cross Blue Shield |
| B6J | Empire Blue Cross Blue Shield |
| B6K | Empire Blue Cross Blue Shield |
| B6L | Empire Blue Cross Blue Shield |
| B6M | Highmark Blue Cross Blue Shield of Delaware |
| B6N | Empire Blue Cross Blue Shield |
| B6O | Empire Blue Cross Blue Shield |
| B6P | Empire Blue Cross Blue Shield |
| B6Q | Empire Blue Cross Blue Shield |
| B6R | Empire Blue Cross Blue Shield |
| B6S | Empire Blue Cross Blue Shield |
| B6T | Premera Blue Cross Blue Shield of Alaska |
| B6U | Empire Blue Cross Blue Shield |
| B6V | Empire Blue Cross Blue Shield |
| B6W | Empire Blue Cross Blue Shield |
| B6X | Empire Blue Cross Blue Shield |
| B6Y | Anthem Blue Cross of California |
| B6Z | Carefirst Blue Cross Blue Shield |
| B7A | Anthem Blue Cross of California |
| B7B | Carefirst Blue Cross Blue Shield |
| B7C | Independence Blue Cross |
| B7D | Independence Blue Cross |
| B7E | Blue Cross Blue Shield of North Dakota |
| B7F | Blue Cross Blue Shield of Texas |
| B7G | Empire Blue Cross Blue Shield |
| B7H | Empire Blue Cross Blue Shield |
| B7I | Capital Blue Cross |
| B7J | Highmark Blue Cross Blue Shield |
| B7K | Carefirst Blue Cross Blue Shield |
| B7L | Blue Cross of Massachusetts |
| B7M | Highmark Blue Cross Blue Shield |
| B7N | Anthem Blue Cross Blue Shield of Ohio |
| B7O | Anthem Blue Cross Blue Shield of Georgia |
| B7P | Regence Blue Cross Blue Shield |
| B7Q | Capital Blue Cross |
| B7R | Blue Cross Blue Shield of Minnesota |
| B7S | Blue Cross Blue Shield of Texas |
| B7T | Horizon Blue Cross Blue Shield |
| B7U | Horizon Blue Cross Blue Shield |
| B7V | Horizon Blue Cross Blue Shield |
| B7W | Horizon Blue Cross Blue Shield |
| B7X | Independence Blue Cross |
| B7Y | Independence Blue Cross |
| B7Z | Anthem Blue Cross Blue Shield of Missouri |
| B8A | Anthem Blue Cross of California |
| B8B | Anthem Blue Cross Blue Shield of Virginia |
| B8C | Anthem Blue Cross Blue Shield of Missouri |
| B8D | Anthem Blue Cross Blue Shield of Missouri |
| B8E | Independence Blue Cross |
| B8F | Blue Cross Blue Shield of Texas |
| B8G | Highmark Blue Cross Blue Shield |
| B8H | Blue Cross Blue Shield of Illinois |
| B8I | Unassigned Prefix |
| B8J | Independence Blue Cross |
| B8K | Highmark Blue Cross Blue Shield |
| B8L | Independence Blue Cross |
| B8M | Independence Blue Cross |
| B8N | Anthem Blue Cross of California |
| B8O | Anthem Blue Cross Blue Shield of Georgia |
| B8P | Anthem Blue Cross Blue Shield of Ohio |
| B8Q | Anthem Blue Cross Blue Shield of Ohio |
| B8R | Anthem Blue Cross Blue Shield of Ohio |
| B8S | Anthem Blue Cross Blue Shield of Ohio |
| B8T | Anthem Blue Cross Blue Shield of Ohio |
| B8U | Anthem Blue Cross Blue Shield of Ohio |
| B8V | Anthem Blue Cross Blue Shield of Ohio |
| B8W | Anthem Blue Cross Blue Shield of Ohio |
| B8X | Anthem Blue Cross Blue Shield of Ohio |
| B8Y | Anthem Blue Cross Blue Shield of Ohio |
| B8Z | Anthem Blue Cross Blue Shield of Ohio |
| B9A | Anthem Blue Cross of California |
| B9B | Anthem Blue Cross Blue Shield of Ohio |
| B9C | Anthem Blue Cross Blue Shield of Ohio |
| B9D | Anthem Blue Cross Blue Shield of Ohio |
| B9E | Anthem Blue Cross Blue Shield of Ohio |
| B9F | Blue Cross Blue Shield of Texas |
| B9G | Blue Cross of Massachusetts |
| B9H | Blue Cross Blue Shield of Texas |
| B9I | Unassigned Prefix |
| B9J | Independence Blue Cross |
| B9K | Blue Cross Blue Shield of Oklahoma |
| B9L | Highmark Blue Shield |
| B9M | Highmark Blue Shield |
| B9N | Highmark Blue Shield |
| B9O | Anthem Blue Cross Blue Shield of Georgia |
| B9P | Independence Blue Cross |
| B9Q | Regence Blue Cross Blue Shield |
| B9R | Horizon Blue Cross Blue Shield |
| B9S | Carefirst Blue Cross Blue Shield |
| B9T | Anthem Blue Cross Blue Shield of Virginia |
| B9U | Carefirst Blue Cross Blue Shield |
| B9V | Carefirst Blue Cross Blue Shield |
| B9W | Anthem Blue Cross of California |
| B9X | Carefirst Blue Cross Blue Shield |
| B9Y | Anthem Blue Cross Blue Shield of Indiana |
| B9Z | Carefirst Blue Cross Blue Shield |
| |
