BCBS Prefix List B2A to B9Z

The BCBS Prefix List B2A to B9Z is an important resource for healthcare providers, billing specialists, and administrative staff working with Blue Cross Blue Shield insurance claims. Each BCBS member ID starts with a unique three-letter prefix. Prefixes in the B2A to B9Z range typically represent group health plans, PPO networks, and employer-sponsored insurance policies. These prefixes help identify the correct BCBS company and regional office responsible for claims processing.

Using the correct prefix is essential for smooth claim handling. For example, a member ID starting with “B5Z” corresponds to a specific BCBS division or state plan. Submitting claims without verifying the prefix can cause delays, denials, or misrouted claims. Billing and front-office teams must always confirm the prefix before submitting claims to avoid these issues.

These prefixes also assist during eligibility verification. Staff can enter the prefix into BCBS online portals or payer systems to verify coverage status, copays, deductibles, and prior authorization requirements. Verifying benefits before the patient’s visit reduces claim denials and improves patient satisfaction.

Blue Cross Blue Shield operates as a network of independent companies across different states and regions. Each prefix corresponds directly to one of these companies. The BCBS Prefix List B2A to B9Z provides a reliable way to match member IDs with the correct payer.

Maintaining an updated prefix list helps billing teams increase accuracy and efficiency. It reduces errors, speeds up reimbursements, and lowers administrative workload. Medical offices handling many BCBS claims benefit greatly from using this list. Proper use of prefixes leads to smoother revenue cycle management and better billing operations.

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

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 B2A to B9Z

BCBS Prefix List B2A to B9Z

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