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M20 - Denial Journal
RARC

M20

Missing/incomplete/invalid HCPCS

What This Code Means

The HCPCS code on the claim is missing, incomplete, or invalid.

Common Causes

  • HCPCS code retired or updated in an annual code set change
  • Typo in the HCPCS field

How to Resolve or Appeal

  1. Verify the correct, current HCPCS code for the date of service
  2. Correct and resubmit as a corrected claim

Related Codes

CO-16

More Denial Codes to Check

RARC N75 CARC CO-251 RARC MA112 CARC CO-250 RARC MA113 RARC N38 RARC MA36 CARC CO-207 National Provider Identifier — invalid format RARC MA122 RARC M67 CARC CO-14 The date of birth follows the date of service RARC M127 RARC MA114

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

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