BCBS alpha prefix list
We currently list 859 prefixes under 47 plan names, each with a cited source. Some plan names are regional names or product lines of the same company, so this is not a count of separate Blue companies. The entries include at least one prefix for plans in 37 states plus DC. Entries for plans listed as multi-state are not counted toward any state. Coverage is uneven: a large share of the entries comes from a few plans that publish full prefix lists (the 3 plan names with the most entries account for 59% of them), and many plans have few or no entries. Coverage is partial and growing as we add more sourced prefixes.
Unofficial reference. Prefixes change. Verify with the plan before submitting a claim. Data last updated .
Prefixes by first character
Prefixes that start with a digit are listed under 0-9. Prefixes that mix letters and digits, such as one starting with a letter followed by a digit, are listed under their first letter.
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