BCBSAZ Member ID Prefix Lists
Most Blue Cross® Blue Shield® (BCBS) member IDs begin with a three-character prefix. The prefix is critical for routing claims and electronic inquiries.
Note: BCBSAZ is updating member accounts and replacing prefixes for certain members. For details see the at-a-glance prefix replacement table below and preview the 2023 prefix list.
(for certain members only)
Note: The XBU prefix is no longer in use
More about member account updates
Effective January 1, 2023, we will update some BCBSAZ member
accounts with new member ID prefixes. This may require adjustments in your claim submission process to
ensure accurate and timely claim processing.
Tip: Be sure to submit claims with the prefix related to the date of service.
submit a claim using a prefix that isn’t valid for the service date, you will receive a message advising you
of the prefix replacement and where to find the prefix reference list:
"This member’s ID prefix was replaced. Please check the prefix list at azblue.com/prefix and resubmit with the prefix
that is valid for this service date."
Tip: You might want to adjust the date range of your online remit searches
Some member accounts will be updated without a prefix replacement. All account updates (with and without prefix replacements) may affect remit searches that span a date range. If you find remits are missing from your search, try searching payments issued up to the date of the account update (e.g., 01/01/2023) and do another search for payments issued on or after that date.
Note: For Federal Employee Program® (FEP®) members (prefix “R”), use the following 2022 dates to start or end your remit searches:
- August 6, 2022 (dental claims)
- October 29, 2022 (professional claims)
- November 19, 2022 (institutional claims)
More about BCBS ID prefixes
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In addition to routing claims and electronic inquiries, BCBS member ID
prefixes indicate specific network and benefit plan information. Most prefixes are in the first three positions of the member's ID number and can be a mix of alpha and
numeric characters. FEP plans use just the letter "R" as the prefix. If an ID
does not include a prefix, please check the back of the card for specific instructions to verify
eligibility, submit claims, and contact customer service.