BCBS Prefix List T2A to T9Z

The BCBS Prefix List T2A to T9Z is a vital tool for anyone working with Blue Cross Blue Shield insurance claims. These three-letter prefixes appear at the beginning of every BCBS member ID. Prefixes in the T2A to T9Z range typically represent group health plans, PPO networks, and multi-state employer-sponsored insurance. Each prefix helps identify the correct BCBS company and its location for accurate claims processing.

Using the correct prefix ensures that claims are sent to the right place. For example, a member ID starting with “T6Z” links to a specific BCBS plan in a certain region. Submitting a claim without matching the correct prefix can result in delays or denials. That’s why billing staff must always confirm the prefix before submission.

These prefixes also play a big role during eligibility checks. Staff can enter the prefix into the BCBS portal to verify active coverage, copays, deductibles, and authorization needs. Doing this before the appointment avoids confusion and improves billing accuracy.

Since BCBS operates through many independent companies, each prefix maps directly to a specific state or processing center. The BCBS Prefix List T2A to T9Z allows teams to route claims properly, verify benefits faster, and prevent administrative mistakes.

Maintaining an up-to-date list of these prefixes improves your billing workflow. It saves time, reduces rework, and ensures cleaner claim submissions. Whether you’re working in a small clinic or a large medical billing department, understanding and using the correct prefix is key to getting paid faster.

BCBS Prefix List T2A to T9Z	State lookup	BCBS compnay
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

Hammad Butt

Hi, I’m Hammad Butt the founder and content creator behind BCBS Prefix List. I’m a U.S. Citizen with over 10 years of hands-on experience in the medical billing and healthcare administration industry. Throughout my career, I’ve worked with private practices, urgent care centers, and billing companies across the United States, helping them navigate complex insurance systems especially Blue Cross Blue Shield (BCBS) claims and verifications.

BCBS Prefix List T2A to T9Z

BCBS Prefix List T2A to T9Z

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