Official CARC description: “Services denied at the time authorization/pre-certification was requested.” Here’s what it actually means, why it fires, and how to get the claim paid.
Different from CO 197: you DID ask, and the payer said no — then the service happened anyway. The fight is over the underlying auth denial, and clinical appeals are the lever.
Liability group: CO = Contractual Obligation — the provider absorbs it — the amount cannot be billed to the patient. If the denial is wrong, the money is recovered by correcting or appealing the claim, not by balance-billing.
Pull the original auth denial letter — the appeal targets ITS rationale
File the clinical appeal against the auth denial (deadlines run from that letter)
Urgent cases: document why delay would have harmed the patient
Peer-to-peer review: get the treating clinician on the call
Appeal the auth denial itself with full clinical documentation and the plan's own medical policy criteria. A reversed auth denial converts this claim denial automatically.
Fill in the denial facts — use placeholders, never real patient data (the letter keeps [PATIENT NAME]-style fields so you can merge real details privately). A payer-ready draft with an enclosure checklist comes back in ~20 seconds.
Your appeal letter draft will appear here.
Services denied at the time authorization/pre-certification was requested. In practice: Different from CO 197: you DID ask, and the payer said no — then the service happened anyway. The fight is over the underlying auth denial, and clinical appeals are the lever.
CO stands for Contractual Obligation — the provider absorbs it — the amount cannot be billed to the patient. If the denial is wrong, the money is recovered by correcting or appealing the claim, not by balance-billing.
Appeal the auth denial itself with full clinical documentation and the plan's own medical policy criteria. A reversed auth denial converts this claim denial automatically.