Find any Blue Cross Blue Shield plan by prefix code. Get provider phone numbers, payer IDs, claims addresses, and timely filing limits instantly.
Covering 20,095 prefixes across 65 BCBS plans in 53 states.
A BCBS alpha prefix is the three-character code at the start of a member’s Blue Cross Blue Shield ID number. It identifies which of the 60+ independent BCBS companies holds the member’s coverage and routes claims to the correct payer.
Medical billers use the prefix to determine where to submit claims, which payer ID to use for electronic filing, and which timely filing limits apply. Getting the prefix wrong means denied claims and delayed payments.
This tool maps every known BCBS prefix to its home plan, along with the billing information you need to submit claims correctly the first time.