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CO-P17 - Denial Journal
CARC

CO-P17

What This Code Means

Referral not authorized by attending physician per regulatory requirement. To be used for Property and Casualty only.

Common Causes

  • Authorization/referral not obtained before the service
  • Authorization obtained but for different codes, units, or dates than billed
  • Authorization expired before the service date

How to Resolve or Appeal

  1. Check the payer portal for an authorization on file and compare it exactly to what was billed
  2. Request a retroactive authorization if the payer allows it
  3. Appeal with clinical documentation if retro-authorization is denied

More Denial Codes to Check

RARC M60 CARC CO-197 Precertification/authorization/notification absent CARC B7 Provider not certified/eligible to be paid for this procedure/service on this date CARC PI-B7 Provider not certified/eligible to be paid for this service on this date RARC M130 RARC M141 CARC CO-284 RARC N45 RARC M34 RARC M142 CARC CO-39 Services denied at the time authorization/pre-certification was requested CARC CO-243 RARC N41

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

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