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Filing, duplicates, authorization, and provider eligibility · Last verified 2026-08-30

CARC 197 denial code on dental claims

Independent publisher · Drafted with AI assistance, verified against primary sources · Credentialed review pending

CARC 197 is the “Pre-authorization missing” code on a dental remittance. Whether it can be contested depends on the facts; run the checks below first.

Group code: X12 assigns 197 no group code. CMS makes CO contingent on a contractual agreement or a regulatory requirement, so whether a missed authorization becomes a write-off is a contract question rather than a property of the code, and out-of-network or member-notified situations can land as patient responsibility instead. A group code always travels with a CARC, and it — not the CARC — assigns financial responsibility, so read the one on your remittance rather than assuming. Offices commonly write this one as CO 197; that is search shorthand, not a statement that the payer will use CO.

Registry entry: X12 Claim Adjustment Reason Code 197 — in the code set since 2006-10-31; description last revised 2018-05-01; active, with no deactivation date. Read on the list published 2025-11-01.

Verdict

Depends — check the facts first

A valid contract term may control, while a factual error may be contested. Run the checks on this page before using the appeal window.

Search for evidence the authorization exists before conceding: a reference number, a portal record, a call log. Where authorization genuinely was not obtained, be realistic about back-dating — the one dental programme with a published exception path allows it only in narrow circumstances such as back-dated eligibility, requires the request within 90 days of treatment, guarantees nothing, and states plainly that approvals will not be issued because the provider forgot or did not realise approval was needed. Florida adds a payer-side rule for 2025-renewed contracts: a claim for a procedure specifically included in a prior authorization cannot be denied except in enumerated circumstances.

The appealability verdicts on these pages are Dentovio's editorial classification. No standards body or payer publishes an appealability taxonomy: X12 defines what a code means, not what to do about it. Each verdict is built from the code's own mechanics and the payer and federal documents cited on the page, and it is a starting point for triage rather than a prediction of any outcome.

What it means in dental

A plan-required pre-service step was not completed, such as approval, certification, notice, or treatment review.

Common on implants, orthodontics, and major restorative under plans that require pre-treatment review — and on Medicaid dental programmes with authorization rules (Delta Dental of Washington requires prior authorization for SRP at ages 13–18 under Apple Health, per its published criteria). Prior approval is genuinely required for implants and orthodontics in named state programmes — New York Medicaid says so in its dental manual — while other procedures need approval only past a frequency threshold rather than routinely. Two facts from that manual travel with any authorization discussion: approval does not guarantee payment, and deviating from an approved plan can void the approval entirely and expose the payment to recoupment. Worth noting how thinly payers document the pairing: in MassHealth's whole published crosswalk, CARC 197 appears once, with no remark code at all.

What to do

  1. 1.Search call logs and portals for an authorization reference number before conceding
  2. 2.Check whether the procedure needed routine approval at all, or only past a frequency threshold
  3. 3.If treatment is already rendered, check whether the payer publishes a back-dating exception and what its window is — provider oversight is usually excluded
  4. 4.For a Florida contract delivered, issued, or renewed on or after January 1, 2025, read Fla. Stat. §627.6131(21) if the denied procedure was inside an approved prior authorization — it lets the insurer deny anyway only on the grounds listed there

Remark codes verified with this CARC

No source read for this page pairs a remark code with CARC 197. X12 defines no CARC-to-RARC pairings at all: payer crosswalks are specific to that payer's own internal reason codes, and the CAQH CORE combination list binds only payers operating inside its business scenarios. Read the remark code on your own remittance.

Appeal routes, by plan funding

Fully-insured route

State insurance law (prompt-pay statutes + plan appeal terms)

Check the state's prompt-pay rule first — an overdue clean claim may already be accruing interest without any appeal. Then run the policy's internal appeal, and escalate to the state insurance department where deadlines were missed.

Self-funded (ERISA) route

29 CFR 2560.503-1

Appeal in the patient's name (or with an authorized-representative form), demand the claim file and the specific internal rule relied on, and hold the plan to the 30/60-day clocks in writing. Before counting on a state remedy, read that state's own scope provision: several state prompt-pay and external-review statutes reach only insurers and HMOs by their terms, so they do not extend to a self-funded plan.

Medicaid managed care route

42 CFR 438.402 / 438.408

First classify the dispute. For an enrollee benefit denial, track two clocks in order: 60 days to the plan appeal, then (after the resolution notice) the state's 90–120-day fair-hearing window, with written consent before a provider acts for the enrollee. For a provider payment or contract dispute, use the provider contract and state Medicaid program process instead. For members under 21, federal EPSDT coverage rules also matter.

Read with this code

Sources

Last verified 2026-08-30. Dentovio is an independent publisher — not a payer, the ADA, X12, CAQH CORE, or any government agency. Code meanings and remark-code meanings on this page are Dentovio's own wording, written from the official X12 Claim Adjustment Reason Code and Remittance Advice Remark Code lists and linked back to them; X12 holds the copyright in those lists and its descriptions are not reproduced here. CDT codes are referenced by number only; CDT is the American Dental Association's copyrighted code set and this page does not reproduce ADA descriptors. Appealability verdicts are Dentovio editorial classification, not a standard. Every fact traces to the code steward's registry, a federal rule or manual, a HIPAA operating rule, an association publication, or a named payer's own document — never to a billing blog. This page was drafted with AI assistance and verified against the primary sources linked here. It has not been reviewed by a credentialed dental billing specialist, attorney, or clinician. Educational billing reference only — not billing, legal, or clinical advice. Plan contracts control individual outcomes, and processing policies usually live in the payer's provider manual rather than in the signed agreement. How this data is verified