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BCBS Alpha Numeric Prefix from S2A to S9Z (UPDATE 2025)
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When it comes to medical billing and insurance claims, understanding the Blue Cross Blue Shield (BCBS) member ID prefixes can significantly ease the process. This guide aims to provide a comprehensive list of BCBS alpha-numeric prefixes from S2A to S9Z, helping medical billers, healthcare providers, and patients quickly identify the corresponding BCBS healthcare plan.
This updated list includes various key information about each prefix, including the home plan name, state, and its website to ensure you have all the necessary resources at your fingertips.
List of BCBS Alpha Numeric Prefix from S2A to S9Z
| BCBS Alpha Numerix Prefix | BCBS Home Plan Name | State | BCBS Home Plan Website |
| S2A | Blue-Cross Blue-Shield of Western New York | New York (Western) | https://www.bcbswny.com/ |
| S2B | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2C | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2D | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S2E | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2F | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2G | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S2H | Blue-Cross Blue-Shield of Alabama | Alabama | https://www.bcbsal.org/ |
| S2I | Anthem BCBS of Wisconsin | Wisconsin | https://www.anthem.com/contact-us/wisconsin/ |
| S2J | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2K | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S2L | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2M | Regence BCBS | Oregon/Idaho/Utah/Washington | https://www.regence.com/home |
| S2N | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2O | Blue-Cross Blue-Shield of North Carolina | North Carolina | https://www.bluecrossnc.com/ |
| S2P | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2Q | BCBS of Massachusetts | Massachusetts | bluecrossma.org |
| S2R | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2S | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| S2T | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2U | Anthem Blue Cross of California | California | https://www.anthem.com/ca |
| S2V | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2W | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2X | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S2Y | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S2Z | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S3A | Blue-Shield of Northeastern New York | New York (Northeastern) | https://www.bsneny.com/content/neny.html |
| S3B | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S3C | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| S3D | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S3E | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S3F | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S3G | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S3H | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S3I | Anthem BCBS of Georgia | Georgia | https://www.anthem.com/contact-us/georgia/ |
| S3J | Carefirst Blue Cross Blue-Shield | Maryland/District of Columbia/Northern Virginia | https://provider.carefirst.com/providers/home.page |
| S3K | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S3L | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S3M | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S3N | Highmark BCBS of Pennsylvania | Pennsylvania | https://www.highmarkbcbs.com/ |
| S3O | Highmark BCBS of Pennsylvania | Pennsylvania | https://www.highmarkbcbs.com/ |
| S3P | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S3Q | Anthem Blue Cross of California | California | https://www.anthem.com/ca |
| S3R | Highmark BCBS of Pennsylvania | Pennsylvania | https://www.highmarkbcbs.com/ |
| S3S | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| S3T | Blue-Cross Blue-Shield of Western New York | New York (Western) | https://www.bcbswny.com/ |
| S3U | Highmark Blue-Cross Blue-Shield of Delaware | Delaware | https://www.highmarkbcbsde.com/ |
| S3V | Highmark BCBS of Pennsylvania | Pennsylvania | https://www.highmarkbcbs.com/ |
| S3W | Anthem BCBS of Georgia | Georgia | https://www.anthem.com/contact-us/georgia/ |
| S3X | Anthem Blue Cross of California | California | https://www.anthem.com/ca |
| S3Y | BCBS of Massachusetts | Massachusetts | bluecrossma.org |
| S3Z | Blue-Cross Blue-Shield of Arizona | Arizona | https://m.azblue.com/ |
| S4A | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S4B | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S4C | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S4D | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S4E | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S4F | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S4G | BCBS of Massachusetts | Massachusetts | bluecrossma.org |
| S4H | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S4I | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| S4J | Carefirst Blue Cross Blue-Shield | Maryland/District of Columbia/Northern Virginia | https://provider.carefirst.com/providers/home.page |
| S4K | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| S4L | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S4M | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S4N | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S4O | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S4P | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S4Q | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S4R | Empire Blue-Cross Blue-Shield of New York | New York | https://www.empireblue.com/ |
| S4S | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| S4T | Carefirst Blue Cross Blue-Shield | Maryland/District of Columbia/Northern Virginia | https://provider.carefirst.com/providers/home.page |
| S4U | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S4V | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S4W | Regence BCBS | Oregon/Idaho/Utah/Washington | https://www.regence.com/home |
| S4X | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S4Y | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S4Z | Carefirst Blue Cross Blue-Shield | Maryland/District of Columbia/Northern Virginia | https://provider.carefirst.com/providers/home.page |
| S5A | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S5B | Anthem BCBS of Colorado | Colorado | https://www.anthem.com/contact-us/colorado/ |
| S5C | BCBS of Massachusetts | Massachusetts | bluecrossma.org |
| S5D | Anthem Blue Cross of California | California | https://www.anthem.com/ca |
| S5E | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S5F | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S5G | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S5H | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S5I | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S5J | Anthem BCBS of Connecticut | Connecticut | https://www.anthem.com/contact-us/connecticut/ |
| S5K | Anthem BCBS of Connecticut | Connecticut | https://www.anthem.com/contact-us/connecticut/ |
| S5L | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S5M | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S5N | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S5O | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S5P | BCBS of Minnesota | Minnesota | https://www.bluecrossmn.com/providers |
| S5Q | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S5R | Anthem BCBS of Georgia | Georgia | https://www.anthem.com/contact-us/georgia/ |
| S5S | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| S5T | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S5U | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S5V | Highmark BCBS of Pennsylvania | Pennsylvania | https://www.highmarkbcbs.com/ |
| S5W | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S5X | Anthem BCBS of Connecticut | Connecticut | https://www.anthem.com/contact-us/connecticut/ |
| S5Y | Anthem BCBS of Connecticut | Connecticut | https://www.anthem.com/contact-us/connecticut/ |
| S5Z | Anthem BCBS of Connecticut | Connecticut | https://www.anthem.com/contact-us/connecticut/ |
| S6A | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S6B | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S6C | Anthem BCBS of Virginia | Virginia | https://www.anthem.com/contact-us/virginia/ |
| S6D | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S6E | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S6F | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S6G | Anthem BCBS of Connecticut | Connecticut | https://www.anthem.com/contact-us/connecticut/ |
| S6H | BCBS of Minnesota | Minnesota | https://www.bluecrossmn.com/providers |
| S6I | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S6J | Anthem BCBS of Wisconsin | Wisconsin | https://www.anthem.com/contact-us/wisconsin/ |
| S6K | Anthem Blue-Cross Blue-Shield of Ohio | Ohio | https://www.anthem.com/contact-us/ohio/ |
| S6L | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S6M | Anthem Blue-Cross Blue-Shield of Kentucky | Kentucky | https://www.anthem.com/contact-us/kentucky/ |
| S6N | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S6O | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S6P | Regence BCBS | Oregon/Idaho/Utah/Washington | https://www.regence.com/home |
| S6Q | Empire Blue-Cross Blue-Shield of New York | New York | https://www.empireblue.com/ |
| S6R | Anthem Blue-Cross Blue-Shield of Maine | Maine | https://www.anthem.com/contact-us/maine/ |
| S6S | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| S6T | Carefirst Blue Cross Blue-Shield | Maryland/District of Columbia/Northern Virginia | https://provider.carefirst.com/providers/home.page |
| S6U | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S6V | Anthem Blue Cross of California | California | https://www.anthem.com/ca |
| S6W | Regence BCBS | Oregon/Idaho/Utah/Washington | https://www.regence.com/home |
| S6X | Anthem Blue Cross of California | California | https://www.anthem.com/ca |
| S6Y | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S6Z | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S7A | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S7B | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S7C | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S7D | Anthem BCBS of Wisconsin | Wisconsin | https://www.anthem.com/contact-us/wisconsin/ |
| S7E | Regence BCBS | Oregon/Idaho/Utah/Washington | https://www.regence.com/home |
| S7F | Anthem Blue Cross of California | California | https://www.anthem.com/ca |
| S7G | Anthem BCBS of Virginia | Virginia | https://www.anthem.com/contact-us/virginia/ |
| S7H | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S7I | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S7J | Horizon BCBS of New Jersey | New Jersey | https://www.horizonblue.com/ |
| S7K | Horizon BCBS of New Jersey | New Jersey | https://www.horizonblue.com/ |
| S7L | Regence BCBS | Oregon/Idaho/Utah/Washington | https://www.regence.com/home |
| S7M | Carefirst Blue Cross Blue-Shield | Maryland/District of Columbia/Northern Virginia | https://provider.carefirst.com/providers/home.page |
| S7N | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S7O | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S7P | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S7Q | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S7R | Anthem Blue Cross of California | California | https://www.anthem.com/ca |
| S7S | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| S7T | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S7U | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S7V | Anthem BCBS of Georgia | Georgia | https://www.anthem.com/contact-us/georgia/ |
| S7W | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S7X | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S7Y | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S7Z | Anthem Blue Cross of California | California | https://www.anthem.com/ca |
| S8A | Anthem Blue-Cross Blue-Shield of Ohio | Ohio | https://www.anthem.com/contact-us/ohio/ |
| S8B | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S8C | Empire Blue-Cross Blue-Shield of New York | New York | https://www.empireblue.com/ |
| S8D | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S8E | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S8F | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S8G | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S8H | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S8I | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S8J | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S8K | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S8L | BCBS of Illinois | Illinois | https://www.bcbsil.com/ |
| S8M | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S8N | BCBS of Minnesota | Minnesota | https://www.bluecrossmn.com/providers |
| S8O | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S8P | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S8Q | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S8R | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S8S | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| S8T | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S8U | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S8V | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S8W | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S8X | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S8Y | Highmark BCBS of Pennsylvania | Pennsylvania | https://www.highmarkbcbs.com/ |
| S8Z | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S9A | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S9B | Premera Blue-Cross Blue-Shield of Alaska | Alaska | https://www.premera.com/ak/provider/ |
| S9C | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S9D | Anthem BCBS of Indiana | Indiana | https://providers.anthem.com/indiana-provider/home |
| S9E | Carefirst Blue Cross Blue-Shield | Maryland/District of Columbia/Northern Virginia | https://provider.carefirst.com/providers/home.page |
| S9F | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S9G | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S9H | Regence BCBS | Oregon/Idaho/Utah/Washington | https://www.regence.com/home |
| S9I | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S9J | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S9K | Regence BCBS | Oregon/Idaho/Utah/Washington | https://www.regence.com/home |
| S9L | Regence BCBS | Oregon/Idaho/Utah/Washington | https://www.regence.com/home |
| S9M | BCBS of Michigan | Michigan | https://www.bcbsm.com/ |
| S9N | BCBS of Texas | Texas | https://www.bcbstx.com/ |
| S9O | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S9P | Anthem Blue Cross of California | California | https://www.anthem.com/ca |
| S9Q | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S9R | Anthem Blue-Cross Blue-Shield of Ohio | Ohio | https://www.anthem.com/contact-us/ohio/ |
| S9S | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania | Pennsylvania | Independence Blue-Cross of Philadelphia and Southeastern Pennsylvania |
| S9T | Anthem Blue-Cross Blue-Shield of Kentucky | Kentucky | https://www.anthem.com/contact-us/kentucky/ |
| S9U | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S9V | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S9W | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S9X | Anthem BCBS of Missouri | Missouri | https://www.anthem.com/contact-us/missouri/ |
| S9Y | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| S9Z | Anthem BCBS of Connecticut | Connecticut | https://www.anthem.com/contact-us/connecticut/ |
Understanding these prefixes can streamline the insurance claim process, benefiting both providers and patients alike. Providers may use this reference to check coverage and eligibility ahead of services rendered.
In the increasingly complex landscape of healthcare billing, accurate prefix information can serve as a powerful tool to avoid claim denials and improve the revenue cycle. If you have inquiries beyond the prefixes, do not hesitate to reach out via email for assistance.
Why It Matters
Effective medical billing ensures financial stability within healthcare practices. By utilizing a reliable prefix list:
- Efficiency: Simplify the billing process.
- Accuracy: Reduce the risk of claim rejections.
- Reliability: Ensure prompt payments for healthcare services.
If your practice is seeking assistance with medical billing, Texmed Billing Solutions is here to help enhance your revenue cycle management effectively.
For more information on our services, reach out via email at support@texmed.us.