CO-109 | Claim not covered by this payer

Industry

Healthcare

Canonical

/insurance/healthcare/error-codes/co-109/

Last Updated

Feb 25, 2026

Summary

This code indicates that the payer is not responsible for covering the submitted claim.

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Use these links to pivot between the directory, a focused guide, and nearby related codes.

Hub

Guides

The Complete Insurance Claim Denial Codes Directory (2026 Edition)

Related Codes

What This Code Means

CO-109 is used when the insurer determines it is not the correct payer for the claim. Coverage may exist under another insurer or plan. This is a payer responsibility determination, not a service denial. The claim itself may be valid but directed to the wrong payer. It does not imply improper billing.

Where Users Usually See This Code

Remittance advice
EOB statements
Claim status portals

Why This Code Appears

Incorrect payer information submitted
Coordination of benefits issues
Coverage terminated or changed

What Typically Happens Next

The claim is denied by the payer
Responsibility shifts to another insurer
The claim may need redirection

What This Code Is Not

It is not a non-covered service
It is not a billing format error
It is not patient responsibility by default

Troubleshooting Checklist

□ Verify primary coverage
□ Review coordination of benefits
□ Confirm active policy status

Notes And Edge Cases

Dual coverage situations often trigger this code. Timing of coverage updates can cause temporary payer mismatches.

Related Codes

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