Denial Code CO-109: Description, Meaning and How to Fix It
This is the wrong payer for the claim.
Official description
Claim/service not covered by this payer/contractor. You must send the claim/service to the correct payer/contractor.
Common cause
Incorrect insurance on file, a plan change, or the member belongs to a different plan/contractor.
How to fix it
Re-verify eligibility, identify the correct payer, and resubmit there.
Related denial codes
- CO-45: The amount billed is higher than the payer's contracted (allowed) rate. The difference is a contractual write-off, not a patient balance.
- CO-16: The claim is missing required information or has an error. It is almost always paired with a RARC that names the specific missing field.
- CO-97: This service is bundled into another service that was already paid, so it is not paid separately.
- CO-18: The payer received this exact claim/service already.
- CO-22: Another insurer should be billed first under coordination of benefits.
- CO-29: The claim was submitted after the payer's filing deadline.