| A2A | Texas | Blue-Cross Blue-Shield of Texas |
| A2B | Texas | Blue-Cross Blue-Shield of Texas |
| A2C | Illinois | Blue-Cross Blue-Shield of Illinois |
| A2D | Texas | Blue-Cross Blue-Shield of Texas |
| A2E | Texas | Blue-Cross Blue-Shield of Texas |
| A2F | Texas | Blue-Cross Blue-Shield of Texas |
| A2G | Illinois | Blue-Cross Blue-Shield of Illinois |
| A2H | Texas | Blue-Cross Blue-Shield of Texas |
| A2I | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A2J | Illinois | Blue-Cross Blue-Shield of Illinois |
| A2K | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A2L | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A2M | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A2N | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A2O | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A2P | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A2Q | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| A2R | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A2S | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A2T | Alaska | Premera Blue-Cross of Alaska |
| A2U | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| A2V | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A2W | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| A2X | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A2Y | Texas | Blue-Cross Blue-Shield of Texas |
| A2Z | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A3A | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| A3B | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A3C | Arkansas | Arkansas Blue-Cross Blue-Shield |
| A3D | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A3E | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A3F | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A3G | Illinois | Blue-Cross Blue-Shield of Illinois |
| A3H | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A3I | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A3J | Illinois | Blue-Cross Blue-Shield of Illinois |
| A3K | Texas | Blue-Cross Blue-Shield of Texas |
| A3L | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| A3M | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| A3N | Illinois | Blue-Cross Blue-Shield of Illinois |
| A3O | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A3P | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| A3Q | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| A3R | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A3S | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A3T | Texas | Blue-Cross Blue-Shield of Texas |
| A3U | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A3V | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| A3W | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| A3X | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A3Y | Texas | Blue-Cross Blue-Shield of Texas |
| A3Z | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| A4A | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A4B | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A4C | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| A4D | Illinois | Blue-Cross Blue-Shield of Illinois |
| A4E | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A4F | Michigan | Blue-Cross Blue-Shield of Michigan |
| A4G | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A4H | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A4I | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A4J | Illinois | Blue-Cross Blue-Shield of Illinois |
| A4K | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| A4L | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A4M | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A4N | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A4O | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A4P | Illinois | Blue-Cross Blue-Shield of Illinois |
| A4Q | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A4R | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A4S | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| A4T | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| A4U | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A4V | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A4W | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A4X | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A4Y | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| A4Z | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A5A | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A5B | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A5C | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A5D | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A5E | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A5F | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A5G | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A5H | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A5I | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A5J | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A5K | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A5L | Vermont | Blue-Cross Blue-Shield of Vermont |
| A5M | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| A5N | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A5O | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A5P | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A5Q | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A5R | California | Anthem Blue-Cross |
| A5S | Tennessee | Blue-Cross Blue-Shield of Tennessee |
| A5T | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A5U | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A5V | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A5W | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| A5X | - | Unallocated/Not Assigned |
| A5Y | New Jersey | Horizon Blue-Cross Blue-Shield of New Jersey |
| A5Z | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6A | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| A6B | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6C | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| A6D | Illinois | Blue-Cross Blue-Shield of Illinois |
| A6E | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A6F | Illinois | Blue-Cross Blue-Shield of Illinois |
| A6G | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6H | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6I | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A6J | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A6K | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6L | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6M | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| A6N | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6O | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A6P | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| A6Q | California | Anthem Blue-Cross |
| A6R | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6S | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6T | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6U | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A6V | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6W | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6X | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6Y | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A6Z | Nevada | Anthem Blue-Cross Blue-Shield of Nevada |
| A7A | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7B | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7C | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| A7D | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7E | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| A7F | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7G | Illinois | Blue-Cross Blue-Shield of Illinois |
| A7H | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7I | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7J | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A7K | Illinois | Blue-Cross Blue-Shield of Illinois |
| A7L | Indiana | Anthem Blue-Cross Blue-Shield of Indiana |
| A7M | Illinois | Blue-Cross Blue-Shield of Illinois |
| A7N | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7O | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7P | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A7Q | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7R | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7S | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| A7T | Vermont | Blue-Cross Blue-Shield of Vermont |
| A7U | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7V | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7W | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7X | North Dakota | Blue-Cross Blue-Shield of North Dakota |
| A7Y | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A7Z | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| A8A | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| A8B | Illinois | Blue-Cross Blue-Shield of Illinois |
| A8C | Illinois | Blue-Cross Blue-Shield of Illinois |
| A8D | California | Anthem Blue-Cross |
| A8E | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A8F | Pennsylvania | Highmark Blue-Shield of Pennsylvania |
| A8G | California | Anthem Blue-Cross |
| A8H | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A8I | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| A8J | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A8K | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| A8L | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |
| A8M | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| A8N | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A8O | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| A8P | Pennsylvania | Capital Blue-Cross of Pennsylvania |
| A8Q | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| A8R | Texas | Blue-Cross Blue-Shield of Texas |
| A8S | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| A8T | Illinois | Blue-Cross Blue-Shield of Illinois |
| A8U | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| A8V | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| A8W | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A8X | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A8Y | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| A8Z | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| A9A | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| A9B | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| A9C | Connecticut | Anthem Blue-Cross Blue-Shield of Connecticut |
| A9D | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| A9E | Illinois | Blue-Cross Blue-Shield of Illinois |
| A9F | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| A9G | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| A9H | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| A9I | Wisconsin | Anthem Blue-Cross Blue-Shield of Wisconsin |
| A9J | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A9K | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| A9L | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| A9M | Colorado | Anthem Blue-Cross Blue-Shield of Colorado |
| A9N | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| A9O | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| A9P | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| A9Q | California | Anthem Blue-Cross |
| A9R | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A9S | Maryland/District of Columbia/Northern Virginia | Carefirst Blue-Cross Blue-Shield |
| A9T | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| A9U | California | Anthem Blue-Cross |
| A9V | Illinois | Blue-Cross Blue-Shield of Illinois |
| A9W | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| A9X | Texas | Blue-Cross Blue-Shield of Texas |
| A9Y | California | Anthem Blue-Cross |
| A9Z | Pennsylvania | Highmark Blue-Cross Blue-Shield of Pennsylvania |