Provider eligibility / credentialing depends on enrollment

Denial Code CARC B7: This provider was not certified/eligible to be paid for this service on this date

CARC B7 means: this provider was not certified/eligible to be paid for this service on this date. Here's what it means in plain English, why it happens, and how it's worked toward payment.

CARC B7 — This provider was not certified/eligible to be paid for this service on this date. Denial family: Provider eligibility / credentialing.

Why you get a CARC B7 denial

The rendering provider wasn't enrolled/credentialed with the payer for that date or service.
Enrollment was pending or had a gap on the date of service.
The provider's taxonomy or specialty wasn't recognized for that code.

How to fix or appeal CARC B7

Verify the provider's enrollment/credentialing status with the payer for that date.
If enrollment is now active (or retroactive), request reprocessing with the effective date.
Correct provider identifiers/taxonomy if mis-keyed and rebill.

Recoverable when enrollment was actually active or applies retroactively; otherwise it's a credentialing fix.

Have a stack of CARC B7 (or other) denials piling up? Get a free forensic A/R audit →

CARC B7 — FAQ

What does CARC B7 mean?

The payer's records show the provider wasn't eligible to be paid for that service on that date — usually an enrollment or credentialing gap. Verify status for the exact date of service.

Can a B7 denial be fixed?

Often — if enrollment was active or is granted retroactively, the payer can reprocess. If it's a credentialing gap, it's resolved going forward and any retro window is worked.