BCBS is one of the largest medical insurance company by total members of more than 45 million. And to manage such a big network, they divided it into different departments state wise or employer specific. To identify correct department, they use 3 characters Prefix in the BCBS members plan ID. BCBS prefix are easy to identify using our BCBS prefix lookup because they’re part of every BCBS member ID and we included all of them here in the BCBS prefix list.
Website : https://xceedbillingsolutions.com/bcbs-prefixes-list/