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BCBS Prefix T2A–T9Z: 2026 Updates & Reference
2026 update: T2A–T9Z prefix reference
Reviewed October 26, 2026. The original 2025 directory is retained below as a historical reference. This update verifies the specific changes cited here; it does not certify every historical prefix assignment for 2026. Use the member’s current ID card and the prefix valid for the date of service when checking eligibility or submitting a claim.
No range-specific reassignment is asserted here from the AZ Blue change records reviewed. Consult the current official AZ Blue prefix list for that plan’s service-date rules and use the member’s home-plan portal for other Blue plans. Absence from this update does not establish that a prefix is unused or unchanged.
Member ID cards: a 2026 change to watch
Highmark’s April 22, 2026 notice explains that BlueCard suitcase logos are being replaced by product indicators such as PPO, EPO or HMO, with the transition continuing into 2027. A missing suitcase logo alone should not be used to rule out BlueCard coverage. Verify the full member ID, prefix and eligibility through the applicable plan.
For the full set of verified changes and official claim-checking resources, see our 2026 BCBS prefix update hub.
Table of Contents
BCBS member ID prefixes serve as an essential tool for medical billers, healthcare providers, and patients to identify Blue Cross Blue Shield (BCBS) healthcare plans. This article details the BCBS Alpha Numeric Prefixes ranging from T2A to T9Z, alongside the corresponding home plan name and their official websites. In addition, we’ll guide you on the importance of these prefixes and how they can assist with your healthcare billing processes.
Importance of BCBS Alpha Numeric Prefixes
Understanding BCBS prefixes is crucial for healthcare providers and billers. These prefixes not only help in identifying the specific BCBS plan but also ensure correct claims processing, reduce errors, and facilitate clearer communication with patients and payers. Each prefix is unique and indicative of a particular regional BCBS service.
List of BCBS Alpha Numeric Prefixes from T2A to T9Z
Below, you’ll find a comprehensive list of BCBS Alpha Numeric Prefixes from T2A to T9Z.
| BCBS Alpha Numeric Prefix | BCBS Home Plan Name | State | BCBS Home Plan Website |
|---|---|---|---|
| T2A | Blue-Cross Blue-Shield of Western New York | New York (Western) | bcbswny.com |
| T2B | BCBS of Illinois | Illinois | bcbsil.com |
| T2C | BCBS of Illinois | Illinois | bcbsil.com |
| T2D | BCBS of Texas | Texas | bcbstx.com |
| T2E | BCBS of Texas | Texas | bcbstx.com |
| T2F | BCBS of Texas | Texas | bcbstx.com |
| T2G | BCBS of Texas | Texas | bcbstx.com |
| T2H | BCBS of Illinois | Illinois | bcbsil.com |
| T2I | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| T2J | BCBS of Texas | Texas | bcbstx.com |
| T2K | BCBS of Texas | Texas | bcbstx.com |
| T2L | Regence BCBS | Oregon/Idaho/Utah/Washington | regence.com |
| T2M | Anthem Blue Cross of California | California | anthem.com/ca |
| T2N | Anthem BCBS of Virginia | Virginia | abcbsva.anthem.com |
| T2O | Anthem Blue-Cross Blue-Shield of Kentucky | Kentucky | anthem.com/contact-us/kentucky |
| T2P | BCBS of Minnesota | Minnesota | bluecrossmn.com |
| T2Q | Anthem Blue Cross of California | California | anthem.com/ca |
| T2R | BCBS of Illinois | Illinois | bcbsil.com |
| T2S | BCBS of Texas | Texas | bcbstx.com |
| T2T | BCBS of Minnesota | Minnesota | bluecrossmn.com |
| T2U | BCBS of Texas | Texas | bcbstx.com |
| T2V | Capital Blue Cross of Pennsylvania | Pennsylvania | capbluecross.com |
| T2W | BCBS of Illinois | Illinois | bcbsil.com |
| T2X | BCBS of Illinois | Illinois | bcbsil.com |
| T2Y | Blue-Cross Blue-Shield of North Dakota | North Dakota | bcbsnd.com |
| T2Z | BCBS of Illinois | Illinois | bcbsil.com |
| T3A | Regence BCBS | Oregon/Idaho/Utah/Washington | regence.com |
| T3B | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| T3C | Regence BCBS | Oregon/Idaho/Utah/Washington | regence.com |
| T3D | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| T3E | BCBS of Texas | Texas | bcbstx.com |
| T3F | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| T3G | Capital Blue Cross of Pennsylvania | Pennsylvania | capbluecross.com |
| T3H | BCBS of Illinois | Illinois | bcbsil.com |
| T3I | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T3J | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| T3K | BCBS of Texas | Texas | bcbstx.com |
| T3L | Capital Blue Cross of Pennsylvania | Pennsylvania | capbluecross.com |
| T3M | Anthem Blue Cross of California | California | anthem.com/ca |
| T3N | Anthem Blue Cross of California | California | anthem.com/ca |
| T3O | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T3P | BCBS of Minnesota | Minnesota | bluecrossmn.com |
| T3Q | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T3R | BCBS of Texas | Texas | bcbstx.com |
| T3S | BCBS of Texas | Texas | bcbstx.com |
| T3T | BCBS of Minnesota | Minnesota | bluecrossmn.com |
| T3U | Anthem BCBS of Missouri | Missouri | anthem.com/contact-us/missouri |
| T3V | Anthem BCBS of Ohio | Ohio | anthem.com/contact-us/ohio |
| T3W | Highmark Blue-Cross Blue-Shield of Western New York | Western New York | bcbswny.com |
| T3X | BCBS of Texas | Texas | bcbstx.com |
| T3Y | Anthem Blue Cross of California | California | anthem.com/ca |
| T3Z | Anthem Blue Cross of California | California | anthem.com/ca |
| T4A | Empire BCBS of New York | New York | empireblue.com |
| T4B | Empire BCBS of New York | New York | empireblue.com |
| T4C | Empire BCBS of New York | New York | empireblue.com |
| T4D | Empire BCBS of New York | New York | empireblue.com |
| T4E | Empire BCBS of New York | New York | empireblue.com |
| T4F | Empire BCBS of New York | New York | empireblue.com |
| T4G | Empire BCBS of New York | New York | empireblue.com |
| T4H | BCBS of Illinois | Illinois | bcbsil.com |
| T4I | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T4J | Empire BCBS of New York | New York | empireblue.com |
| T4K | Empire BCBS of New York | New York | empireblue.com |
| T4L | Empire BCBS of New York | New York | empireblue.com |
| T4M | Empire BCBS of New York | New York | empireblue.com |
| T4N | Empire BCBS of New York | New York | empireblue.com |
| T4O | Anthem BCBS of Colorado | Colorado | anthem.com/contact-us/colorado |
| T4P | BCBS of Illinois | Illinois | bcbsil.com |
| T4Q | Anthem Blue Cross of California | California | anthem.com/ca |
| T4R | BCBS of Texas | Texas | bcbstx.com |
| T4S | Empire BCBS of New York | New York | empireblue.com |
| T4T | Blue-Cross Blue-Shield of Massachusetts | Massachusetts | bluecrossma.org |
| T4U | Empire BCBS of New York | New York | empireblue.com |
| T4V | Empire BCBS of New York | New York | empireblue.com |
| T4W | Premera Blue Cross of Alaska | Alaska | premera.com/ak/provider |
| T4X | Anthem Blue Cross of California | California | anthem.com/ca |
| T4Y | Anthem Blue Cross of California | California | anthem.com/ca |
| T4Z | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T5A | Anthem Blue Cross of California | California | anthem.com/ca |
| T5B | Anthem BCBS of Ohio | Ohio | anthem.com/contact-us/ohio |
| T5C | Anthem Blue Cross of California | California | anthem.com/ca |
| T5D | Anthem Blue Cross of California | California | anthem.com/ca |
| T5E | Anthem Blue Cross of California | California | anthem.com/ca |
| T5F | Anthem BCBS of Virginia | Virginia | abcbsva.anthem.com |
| T5G | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T5H | BCBS of Illinois | Illinois | bcbsil.com |
| T5I | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T5J | Anthem Blue Cross of California | California | anthem.com/ca |
| T5K | Anthem Blue Cross of California | California | anthem.com/ca |
| T5L | BCBS of Illinois | Illinois | bcbsil.com |
| T5M | Anthem BCBS of Colorado | Colorado | anthem.com/contact-us/colorado |
| T5N | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| T5O | Anthem BCBS of Ohio | Ohio | anthem.com/contact-us/ohio |
| T5P | Regence BCBS | Oregon/Idaho/Utah/Washington | regence.com |
| T5Q | Anthem Blue Cross of California | California | anthem.com/ca |
| T5R | BCBS of Texas | Texas | bcbstx.com |
| T5S | BCBS of Texas | Texas | bcbstx.com |
| T5T | Regence BCBS | Oregon/Idaho/Utah/Washington | regence.com |
| T5U | Anthem BCBS of Missouri | Missouri | anthem.com/contact-us/missouri |
| T5V | Anthem Blue Cross of California | California | anthem.com/ca |
| T5W | Anthem Blue Cross of California | California | anthem.com/ca |
| T5X | Anthem Blue Cross of California | California | anthem.com/ca |
| T5Y | Anthem Blue Cross of California | California | anthem.com/ca |
| T5Z | BCBS of Texas | Texas | bcbstx.com |
| T6A | Empire BCBS of New York | New York | empireblue.com |
| T6B | BCBS of Illinois | Illinois | bcbsil.com |
| T6C | Regence BCBS | Oregon/Idaho/Utah/Washington | regence.com |
| T6D | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| T6E | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| T6F | Highmark Blue-Cross Blue-Shield of Delaware | Delaware | highmarkbcbsde.com |
| T6G | Regence BCBS | Oregon/Idaho/Utah/Washington | regence.com |
| T6H | BCBS of Illinois | Illinois | bcbsil.com |
| T6I | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T6J | Premera Blue Cross of Alaska | Alaska | premera.com/ak/provider |
| T6K | Anthem BCBS of Missouri | Missouri | anthem.com/contact-us/missouri |
| T6L | Empire BCBS of New York | New York | empireblue.com |
| T6M | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| T6N | Blue-Cross Blue-Shield of Massachusetts | Massachusetts | bluecrossma.org |
| T6O | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T6P | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| T6Q | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| T6R | Highmark BCBS of West Virginia | West Virginia | highmarkbcbswv.com |
| T6S | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| T6T | BCBS of Michigan | Michigan | bcbsm.com |
| T6U | BCBS of Michigan | Michigan | bcbsm.com |
| T6V | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| T6W | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| T6X | Highmark Blue-Cross Blue-Shield of Delaware | Delaware | highmarkbcbsde.com |
| T6Y | Highmark BCBS of Pennsylvania | Pennsylvania | highmarkbcbs.com |
| T6Z | Highmark BCBS of West Virginia | West Virginia | highmarkbcbswv.com |
| T7A | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T7B | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T7C | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T7D | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T7E | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T7F | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T7G | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T7H | BCBS of Illinois | Illinois | bcbsil.com |
| T7I | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T7J | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T7K | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T7L | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T7M | Anthem BCBS of Ohio | Ohio | anthem.com/contact-us/ohio |
| T7N | Empire BCBS of New York | New York | empireblue.com |
| T7O | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T7P | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T7Q | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T7R | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T7S | Anthem Blue Cross of California | California | anthem.com/ca |
| T7T | BCBS of Illinois | Illinois | bcbsil.com |
| T7U | BCBS of Illinois | Illinois | bcbsil.com |
| T7V | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T7W | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T7X | BCBS of Illinois | Illinois | bcbsil.com |
| T7Y | Anthem BCBS of Ohio | Ohio | anthem.com/contact-us/ohio |
| T7Z | Anthem Blue-Cross Blue-Shield of Wisconsin | Wisconsin | anthem.com/contact-us/wisconsin |
| T8A | Capital Blue Cross of Pennsylvania | Pennsylvania | capbluecross.com |
| T8B | Blue-Shield of Northeastern New York | New York (Northeastern) | bsneny.com |
| T8C | Anthem BCBS of Missouri | Missouri | anthem.com/contact-us/missouri |
| T8D | Anthem BCBS of Missouri | Missouri | anthem.com/contact-us/missouri |
| T8E | Blue-Cross Blue-Shield of Massachusetts | Massachusetts | bluecrossma.org |
| T8F | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| T8G | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| T8H | BCBS of Illinois | Illinois | bcbsil.com |
| T8I | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T8J | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T8K | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T8L | Anthem Blue Cross of California | California | anthem.com/ca |
| T8M | Premera Blue Cross of Alaska | Alaska | premera.com/ak/provider |
| T8N | BCBS of Illinois | Illinois | bcbsil.com |
| T8O | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T8P | Anthem Blue Cross of California | California | anthem.com/ca |
| T8Q | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T8R | Premera Blue Cross of Alaska | Alaska | premera.com/ak/provider |
| T8S | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| T8T | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| T8U | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T8V | Capital Blue Cross of Pennsylvania | Pennsylvania | capbluecross.com |
| T8W | Anthem Blue Cross of California | California | anthem.com/ca |
| T8X | Anthem BCBS of Colorado | Colorado | anthem.com/contact-us/colorado |
| T8Y | Anthem Blue Cross of California | California | anthem.com/ca |
| T8Z | Blue-Cross Blue-Shield of Massachusetts | Massachusetts | bluecrossma.org |
| T9A | Anthem BCBS of Ohio | Ohio | anthem.com/contact-us/ohio |
| T9B | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T9C | Regence BCBS | Oregon/Idaho/Utah/Washington | regence.com |
| T9D | Anthem BCBS of Georgia | Georgia | anthem.com/contact-us/georgia |
| T9E | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T9F | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T9G | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T9H | BCBS of Illinois | Illinois | bcbsil.com |
| T9I | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T9J | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T9K | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T9L | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T9M | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T9N | BCBS of Minnesota | Minnesota | bluecrossmn.com |
| T9O | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T9P | Anthem BCBS of Indiana | Indiana | providers.anthem.com/indiana-provider/home |
| T9Q | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T9R | Empire BCBS of New York | New York | empireblue.com |
| T9S | BCBS of Illinois | Illinois | bcbsil.com |
| T9T | Capital Blue Cross of Pennsylvania | Pennsylvania | capbluecross.com |
| T9U | Prefix Unallocated/Not Assigned | Yet to be assigned | Yet to be assigned |
| T9V | Capital Blue Cross of Pennsylvania | Pennsylvania | capbluecross.com |
| T9W | Anthem Blue-Cross Blue-Shield of Wisconsin | Wisconsin | anthem.com/contact-us/wisconsin |
| T9X | Empire BCBS of New York | New York | empireblue.com |
| T9Y | Anthem BCBS of Ohio | Ohio | anthem.com/contact-us/ohio |
| T9Z | Anthem BCBS of Connecticut | Connecticut | anthem.com/contact-us/connecticut |
BCBS member ID prefixes are a vital part of the medical billing process. They help streamline claims submission and accuracy in billing. For further inquiry or details related to this subject, please feel free to reach out to Texmed Billing Solutions at [email protected].