CARC B7
Provider not eligible for this service on that date
The provider was not certified, enrolled or eligible to be paid for this service on the date it was delivered.
Why you actually get this
- Enrolment with the payer had lapsed or had not completed.
- A newly hired provider began seeing patients before credentialing finished.
- The provider's enrolment does not cover this service or site.
- Revalidation was missed.
How to check whether it’s correct
- 01Confirm the provider's enrolment status with this payer on the date of service.
- 02Check whether a revalidation deadline passed.
- 03Establish whether the service could have been billed under a supervising provider.
Sometimes worth appealing
Where enrolment was retroactively effective, these often pay on resubmission. Where a provider genuinely saw patients before credentialing completed, the loss is usually real — which is why credentialing timelines belong on the hiring calendar, not the billing one. A cluster of these against one provider is a credentialing problem, not a billing problem.
Often arrives with
Seeing a lot of these?
A single denial is a claim to work. A pattern of the same denial is a process to fix, and the two need completely different responses. A free panel reads ninety days of your claims data and shows which codes actually recur for you.
Claim Adjustment Reason Codes are maintained by X12 as External Code List 139. The official description of this code is theirs and is not reproduced here. Check the authoritative list for current wording and status.