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CO-58 - Denial Journal
CARC CO — Contractual Obligation

CO-58

Treatment deemed to have been rendered in an inappropriate or invalid place of service

What This Code Means

The payer determined the setting where the service was performed isn’t appropriate for that service.

Common Causes

  • Procedure typically performed inpatient billed as outpatient (or vice versa)
  • POS code doesn't match payer's coverage rules for that CPT code

How to Resolve or Appeal

  1. Confirm the payer's place-of-service requirements for the CPT code
  2. Correct the POS code if it was entered wrong, or appeal with clinical justification

More Denial Codes to Check

CARC A1 Claim/service denied — generic code, use only when no more specific code applies RARC MA105 CARC CO-199 CARC CO-D18 RARC MA112 CARC CO-D3 CARC CO-16 Claim lacks information needed for adjudication CARC CO-D20 CARC CO-D1 RARC M108 RARC MA104 RARC MA36

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

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