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CO-206 - Denial Journal
CARC CO — Contractual Obligation

CO-206

National Provider Identifier (NPI) — missing

What This Code Means

The claim is missing an NPI that the payer requires.

Common Causes

  • NPI field left blank on the claim
  • Clearinghouse dropped the NPI during transmission

How to Resolve or Appeal

  1. Add the correct NPI (billing, rendering, and/or referring as required) and resubmit

Related Codes

CO-207 CO-208

More Denial Codes to Check

RARC N76 CARC CO-146 Diagnosis was invalid for the date(s) of service reported RARC M49 RARC N31 CARC CO-D1 RARC M128 CARC CO-4 Procedure code inconsistent with the modifier used RARC M136 RARC M120 RARC M77 CARC CO-11 Diagnosis inconsistent with the procedure CARC CO-D21 RARC MA121

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

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