Healthcare Error Code
Healthcare Insurance / Medical Billing
Duplicate / Billing Errors
CO-98 | Charges already adjudicated
Industry
Healthcare
Canonical
/healthcare/error-codes/co-98/
Last Updated
Feb 25, 2026
Summary
This code indicates that the charges have already been processed and adjudicated.
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What This Code Means
CO-98 is applied when payer systems identify that the charges were previously adjudicated. This prevents duplicate processing. The code reflects claim history rather than coverage status. It does not imply billing errors or service issues. The original adjudication outcome remains valid.
Where Users Usually See This Code
- Remittance advice
- Claim status summaries
- Adjustment reports
Why This Code Appears
- Duplicate submission of the same charges
- Resubmission without required indicators
- Prior adjudication exists
What Typically Happens Next
- The claim line is denied
- Original adjudication stands
- No further payment occurs
What This Code Is Not
- It is not a coverage denial
- It is not a documentation issue
- It is not a contractual adjustment
Troubleshooting Checklist
- □ Review claim history
- □ Confirm prior adjudication outcomes
- □ Monitor resubmission guidelines
Notes And Edge Cases
Corrected claims may require different processing paths. Timing of adjudication updates can affect detection.
Related Codes
8 links
- CO-18 CodeDuplicate claim/service
- CO-23 CodeImpact of prior payer adjudication
- CO-109 CodeClaim not covered by this payer
- CO-11 CodeDiagnosis inconsistent with procedure
- CO-31 CodePatient cannot be identified
- CO-54 CodeMultiple physicians not allowed
- CO-133 CodeIncorrect provider type
- CO-16 CodeClaim lacks required information
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