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CO-D12 - Denial Journal
CARC

CO-D12

What This Code Means

Claim/service denied. Claim does not identify who performed the purchased diagnostic test or the amount the provider were charged for the test. This code was deactivated by X12 (as of 10/16/2003). See: 17.

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-101 RARC M103 CARC CO-225 RARC N16 CARC CO-194 CARC CO-114 RARC M114 CARC CO-281 RARC N9 CARC CO-94 CARC CO-171 CARC CO-124 CARC CO-B10

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

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