What does denial code CO 197 mean on a dental claim, and can it be appealed?

Denial code · Last verified 2026-08-29

CO 197 denial code on dental claims

On a dental remittance, code CO 197 means: Required precertification, prior authorization, notification, or pre-treatment review was not obtained before the service. depends: check the facts first. If authorization truly was required and skipped, most contracts make this a provider write-off — the appeal angle is narrow: emergencies, retro-authorization windows the plan allows, or proof authorization was actually obtained (reference numbers win these). 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.

Verdict

Depends — check the facts first

Contractual variants of this denial are final; factual-error variants are winnable. Run the checks on this page before spending the appeal window.

If authorization truly was required and skipped, most contracts make this a provider write-off — the appeal angle is narrow: emergencies, retro-authorization windows the plan allows, or proof authorization was actually obtained (reference numbers win these). 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.

What it means in dental

Common on implants, orthodontics, and major restorative under plans that require pre-treatment review — and on Medicaid dental programs with authorization rules (Delta Dental of Washington requires prior authorization for SRP at ages 13–18 under Apple Health, per its published criteria).

What to do

1.Search call logs and portals for an authorization reference number before conceding
2.Check the plan's retro-authorization window — some allow requests within days of service
3.For Florida contracts renewed since January 1, 2025, check §627.6131(21) if the denied procedure was inside an approved prior authorization

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. State prompt-pay interest and state external review do not apply to self-funded plans.

Medicaid managed care route

42 CFR 438.402 / 438.408

Two clocks, in order: 60 days to the plan appeal, then (after the resolution notice) the state's 90–120-day fair-hearing window. Get the enrollee's written consent early, and for members under 21 remember federal EPSDT coverage rules sit above the plan's own limits.