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CO-109 Recoverability: High

Claim/service not covered by this payer/contractor; you must send the claim to the correct payer

You billed a payer that does not hold responsibility for this member or service. The fix is redirection, and speed matters because the correct payer's filing clock has been running the whole time.

Why this happens on dental claims

  • Employers that carve dental out to a different administrator than the medical card suggests
  • Lookalike regional plan brands where the claim must go to the plan in the subscriber's or group's home state
  • Accident-related or surgical care that belongs on the medical plan submitted to the dental plan, or the reverse

How to appeal CO-109

  1. Call the denying payer or read the remark codes to learn who they believe is responsible
  2. Re-verify with the current card and eligibility response, confirming payer ID and claims address
  3. Submit promptly to the correct payer with proof of the original timely submission to the wrong payer
  4. If the correct payer raises timely filing, appeal with the misdirection history documented
Generate a CO-109 appeal letter

How to prevent it

  • Verify the payer ID from the electronic eligibility response rather than the card's logo
  • Confirm dental carve-outs whenever medical and dental appear to share a carrier

Related codes

CO-22 · This care may be covered by another payer per coordination of benefits CO-29 · The time limit for filing has expired CO-31 · Patient cannot be identified as our insured

How much CO-109 money is sitting in your remittances?

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