CO-57 Denial Code Explained
CO-57 is a medical billing denial code that indicates the procedure or service was denied because prior authorization requirements were not satisfied.
DENIAL CODE
3/7/20221 min read
CO-57 Denial Code Explained
CO-57 is a medical billing denial code that indicates the procedure or service was denied because prior authorization requirements were not satisfied.
What Does CO-57 Mean?
The CO-57 denial code means the insurance payer determined required authorization approval was missing, incomplete, or invalid before treatment was provided.
This denial is often related to authorization workflow issues or payer approval requirements.
Common Reasons for CO-57
Missing prior authorization
Expired authorization approval
Incorrect authorization information
Services not matching authorization records
Incomplete referral documentation
Payer approval policy violations
How To Fix CO-57
Verify authorization requirements and confirm all approvals were completed before services were performed. Providers may need to submit corrected authorization documentation or appeal information before resubmitting the claim.
Related Denial Codes
You may also encounter:
Quick Summary
CO-57 indicates the payer denied reimbursement because authorization requirements were not properly completed. Most denials are related to missing or invalid authorization approvals.
Medical billing denial codes, insurance prefixes, and claim guidance in one searchable resource hub.
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