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CO-296 Denial Code: Authorization Doesn't Apply to Provider

CO-296 means the precertification or authorization number on file may be valid, but it doesn't apply to the provider who billed. The approval exists for this patient and service, just not for your NPI, group, or facility.

Quick facts

Code
CO-296 (CARC 296)
Status
Active In use since July 1, 2018.
Code set
Claim Adjustment Reason Codes (CARC)
Group codes
  • CO (Contractual Obligation): The usual group. The provider absorbs the denial and can't bill the patient; fix the authorization or claim and resubmit.
Official description
Precertification/authorization/notification/pre-treatment number may be valid but does not apply to the provider.
X12 Claim Adjustment Reason Codes, retrieved September 25, 2026
Last verified
against the official X12 list.

What CO-296 means

CARC 296 says the precertification, authorization, notification, or pre-treatment number may be valid but does not apply to the provider. The payer found an authorization for this patient, and possibly for this service, but the provider identifiers on it don’t match the claim.

Payers tie authorizations to specific providers: a billing NPI, a rendering NPI, a facility, a tax ID, or some combination. If the claim arrives under a different identifier than the one on the approval, the system treats the service as unauthorized for that provider. This is a close sibling of CO-284, which covers authorization mismatches on the services rather than on the provider.

Example: a patient’s MRI is authorized with Imaging Center A. The patient schedules at Center B, a sister location with its own NPI. Center B’s claim references the authorization number, but the payer denies with CO-296 because the approval named Center A.

Common causes

  • Authorization under a group NPI, claim under an individual rendering NPI, or the reverse.
  • Service moved to a different location or facility after approval.
  • Ordering provider’s approval used by a separate performing provider without updating it.
  • New provider joining a group whose name isn’t on existing approvals.
  • Tax ID or billing entity change after the authorization was issued.

How to fix it

  1. Pull the authorization record and compare its provider, facility, and tax ID to boxes 24J, 32/32a, and 33/33a on the claim.
  2. If the claim was wrong, correct the provider data and send a corrected claim with resubmission code 7 and the original claim number in box 22.
  3. If the authorization was wrong, ask the payer’s utilization management team to amend the provider, then request reprocessing.
  4. Appeal with the approval letter and scheduling records if the payer won’t amend it and the service matched the approval in every other way.
  5. Don’t bill the patient under CO.

How to prevent it

  • Request authorizations under the provider and location that will actually perform the service.
  • Recheck authorizations when appointments move to a different location or clinician.
  • Keep provider enrollment data aligned across NPIs, tax IDs, and locations. See provider enrollment denials.
  • Verify the authorization’s provider at scheduling. More on this in authorization and referral denials.

Specialty notes

Multi-location imaging centers, surgery groups using several facilities, and behavioral health groups where supervised clinicians see authorized patients are especially prone to provider mismatches.

Remark codes that may appear with CO-296

  • N54 (Claim information is inconsistent with pre-certified/authorized services.): Claim information is inconsistent with the pre-certified or authorized services.
  • M62 (Missing/incomplete/invalid treatment authorization code.): The treatment authorization code is missing, incomplete, or invalid for this claim.
  • CO-284 (Precertification/authorization/notification/pre-treatment number may be valid but does not apply to the billed services.): The authorization number may be valid but doesn't apply to the billed services, rather than the provider.
  • CO-197 (Precertification/authorization/notification/pre-treatment absent.): No authorization at all was on file.
  • CO-198 (Precertification/notification/authorization/pre-treatment exceeded.): The authorization was exceeded, such as more units than approved.
  • CO-302 (Precertification/notification/authorization/pre-treatment time limit has expired.): The authorization's time limit expired.

CO-296 FAQ

How is CO-296 different from CO-284?

Both say the authorization number may be valid. CO-284 means it doesn't cover the billed services, like a different procedure code. CO-296 means it doesn't cover the billing or rendering provider.

What usually causes a provider mismatch?

The authorization was requested under a group NPI but billed under an individual, requested for one location and performed at another, requested by the ordering provider for a different performing facility, or issued before a provider joined the group.

Can the payer update the authorization after the service?

Many payers will amend the provider on an existing authorization when the service and dates are unchanged. Call the utilization management department, then ask for the claim to be reprocessed.

Should I send a corrected claim?

Only if the claim itself had the wrong provider. If the claim was right and the authorization named the wrong provider, fix the authorization and request reprocessing.