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CO-D18 - Denial Journal
CARC

CO-D18

What This Code Means

Claim/Service has missing diagnosis information. This code was deactivated by X12 (as of 06/30/2007). See: 16.

How to Resolve or Appeal

  1. This is a historical/deactivated code — no longer used on current claims. If seen on an old remittance, refer to the replacement code noted above where available.

More Denial Codes to Check

CARC CO-14 The date of birth follows the date of service RARC M110 RARC MA52 RARC MA82 RARC N19 Procedure code incidental to the primary procedure RARC M45 RARC M56 RARC MA30 RARC M33

Educational reference only — not medical or legal advice. Always confirm code usage and appeal rights with the specific payer.

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