CO-23 | Impact of prior payer adjudication

Industry

Insurance

Canonical

/insurance/healthcare/error-codes/co-23/

Last Updated

Feb 25, 2026

Summary

This code indicates that claim processing was affected by a prior payer’s adjudication.

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Hub

Guides

The Complete Insurance Claim Denial Codes Directory (2026 Edition)

Related Codes

What This Code Means

CO-23 is used when a payer considers the outcome of another payer’s adjudication. This reflects coordination of benefits processing. The code does not independently determine coverage. It clarifies that payment decisions account for prior payments or denials. Final reimbursement depends on payer order and rules.

Where Users Usually See This Code

Remittance advice
EOB summaries
Coordination of benefits reports

Why This Code Appears

Secondary or tertiary payer involvement
Prior payer adjudication exists
Coordination rules applied

What Typically Happens Next

Payment is adjusted accordingly
Claim processing completes
Balances are updated

What This Code Is Not

It is not a denial by itself
It is not a billing error
It is not patient responsibility alone

Troubleshooting Checklist

□ Review coordination of benefits
□ Confirm payer order
□ Monitor payment adjustments

Notes And Edge Cases

Different payer hierarchies affect outcomes. Timing of adjudication data exchange can influence results.

Related Codes

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