Denial codes / CO-107

Denial code 107

CO-107: Related claim not identified

The related or qualifying claim/service was not identified.

What to doFix and resend
Often recoverableYes, when worked

The letters in front matter. CO means the office can't bill the patient for the amount; PR means the patient may owe it. The same number can appear with either, so read both parts.

Why dental offices see it

  • The insurer needs the earlier related claim (for example the original placement).
  • A prior authorization or related procedure was not referenced.

What to do

  1. Find the related claim or authorization number.
  2. Add it to the claim and resend.

Stop it next time

Reference prior placement dates and related claims on replacement procedures.

How many CO-107 claims are in your report? The free check counts them, ranks them by dollars and deadline and drafts the letter. It runs in your browser; nothing is uploaded.

Run the free check

Plain-English paraphrase; the official code list is maintained by X12. Insurer rules vary; check the insurer's provider manual. Not legal advice.