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Appeal how-to guide CARC 197

How to appeal a prior authorization denial.

Last updated: August 2026

Prior authorization denials are process failures: either the authorization wasn't obtained, it was obtained for the wrong service or date range, or it wasn't referenced correctly on the claim. The good news: many CARC 197 denials are recoverable once you understand exactly which scenario you're dealing with.

What the full brief covers

Signed-in members see the full brief. Here is what it contains.

  • Determine which scenario you're in
  • Scenarios A and D: corrected claim or appeal with the auth number
  • Scenario B: retroactive authorization
  • Scenario C: emergency or urgent care exception
  • Writing the appeal
  • Prevention: stop CARC 197 before it starts
  • Prior authorization appeal letter template (fillable Word download)

Subscribe to read the full denial brief.