CARC 197: Precertification/authorization/notification/pre-treatment absent.

CARC 197 appears on the 835 ERA (Electronic Remittance Advice) that the payer returns after claim adjudication. It explains a reduction, denial, or payment adjustment to your billing team. For your practice, the question is workflow: identify the pattern, route the denial to the right resolution path (rebill, appeal, write-off), and recover what's recoverable without burning RVU time on dead-end fights.

What CARC 197 means

The official X12 description is: “Precertification/authorization/notification/pre-treatment absent.”

In plain language: Prior authorization was required but wasn't obtained before the service. The carrier won't pay.

Common scenarios

• Emergency procedure
• Provider mistakenly thought PA wasn't required
• Plan changed PA requirements mid-year
• PA denied but service was clinically urgent

Practice workflow for CARC X 197

Appeal with: (a) proof the auth was attempted (call logs, dates), (b) the medical urgency that justified proceeding, (c) the clinical evidence supporting the service. Many states require retrospective PA review for emergency or urgent services. NSA also restricts surprise PA denials.

ApprovalHelp auto-drafts the appeal letter against the right federal appeal-rights regulation (ACA §2719, ERISA §503, NSA §2799A, 42 CFR 422 Subpart M, or 42 CFR 438 Subpart F) for the patient's plan type, the payer's own coverage policy, and the relevant clinical guideline. Drafts route to the clinician for signature in under five minutes.

CARC 197 group codes explained

On the 835 ERA, CARC 197 appears alongside a group code that signals who is financially responsible for the adjustment. CO (Contractual Obligation) — Contractual write-off. The provider agreed to the rate. Patient does NOT owe this amount.