Guides for Blue plan alpha prefixes
Plain-language guides for billing staff on alpha prefixes, reading member ID cards, home and host plans, and what to do when a prefix is not found.
Each guide lists the official sources it relies on and the date it was last reviewed.
- What is a BCBS alpha prefix?
What the first three characters of a Blue member ID mean, why claims need them, and which cards have none.
- How to read a Blue Cross Blue Shield member ID card
Where the prefix sits on the card, what the suitcase logo and product indicators mean, and what to capture.
- BlueCard home plan vs host plan
Which Blue plan decides benefits, which one you send the claim to, and how the prefix connects them.
- Prefix not found? What to do next
Steps to take when a prefix is not in our data or the card has no prefix, and who to call to verify.