Healthcare Error Code
Healthcare Insurance / Medical Billing
Claim Adjustment Reason Codes (CARC)
CO-65 | Procedure code invalid
Industry
Healthcare
Canonical
/healthcare/error-codes/co-65/
Last Updated
Feb 25, 2026
Summary
This code indicates that the procedure code submitted is not valid according to payer rules.
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What This Code Means
CO-65 is applied when a procedure code does not meet payer validation requirements. This may relate to outdated, incorrect, or unsupported codes. The issue is administrative rather than a coverage decision. Valid procedure codes are required for accurate adjudication.
Where Users Usually See This Code
- Claim rejection notices
- Remittance advice
- Billing validation reports
Why This Code Appears
- Invalid or discontinued procedure code used
- Code does not align with payer system rules
- Submission format errors
What Typically Happens Next
- Claim processing stops
- Reprocessing may be required
- Payment is delayed
What This Code Is Not
- It is not a non-covered service decision
- It is not patient responsibility
- It is not a contractual adjustment
Troubleshooting Checklist
- □ Verify procedure code validity
- □ Review coding guidelines
- □ Monitor payer updates
Notes And Edge Cases
Procedure code updates occur periodically. Payer systems may lag behind coding changes.
Related Codes
8 links
- CO-66 CodeIncomplete procedure code
- CO-125 CodeSubmission/billing error
- CO-11 CodeDiagnosis inconsistent with procedure
- CO-133 CodeIncorrect provider type
- CO-109 CodeClaim not covered by this payer
- CO-141 CodeClaim adjusted by payer
- CO-31 CodePatient cannot be identified
- CO-54 CodeMultiple physicians not allowed
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