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CARC 197 · CO-197

CARC 197 Denial: Precertification/authorization/notification/pre-treatment absent — How to Fix and Appeal

Reviewed by QuickIntell RCM Editorial Team · Last reviewed

Updated

TL;DR

CARC 197 (X12 Precertification/authorization/notification/pre-treatment absent). CARC 197 is a prior-authorization denial — the payer required precert/PA/notification for this service and does not have one on file.

Official X12 description

“Precertification/authorization/notification/pre-treatment absent.”

Source: X12 Claim Adjustment Reason Codes. The X12 External Code Lists are the single authoritative source for every CARC descriptor — always verify against the current release before building a claim-scrub rule.

What CARC 197 actually means

CARC 197 is a prior-authorization denial — the payer required precert/PA/notification for this service and does not have one on file. This is one of the most commonly appealable CARCs, and success depends on whether a PA was actually obtained (and not linked to the claim) or was never obtained. For services where retro-authorization is allowed, file immediately; for services where it is not, appeal hinges on medical-necessity and emergent-circumstance arguments.

Common root causes

  • No prior authorization was obtained before the service.
  • Authorization was obtained but the authorization number was not linked to the claim.
  • Authorization was obtained for a different code, different date, or different provider than the one billed.
  • The service was performed emergently but the post-service notification window was missed.

Prevention checklist

  • Automated PA-requirement lookup at scheduling against the payer's PA list.
  • PA-status dashboard with aging: no service performed without either an approved PA or a documented emergent-circumstance note.
  • Link PA authorization numbers to the charge at the scheduling / encounter level so they flow onto the claim automatically.
  • For emergent services, document the emergency and file notification within the payer's published window (usually 24–72 hours).

Appeal strategy — step by step

Most CARC 197 denials clear faster with the right remediation than with a formal appeal. Work the steps in order and escalate only when a lower-effort path has been ruled out.

  1. 1If a PA was obtained, locate the authorization number and submit a corrected claim with it populated.
  2. 2If no PA was obtained and the payer offers retro-authorization, file immediately with clinical records.
  3. 3For emergent services, appeal with documentation of the emergency (ED notes, vital signs, imaging) and a citation to the plan's emergency-services exception.
  4. 4For services where a PA was obtained for a different code, appeal with the authorization letter and clinical rationale for the code change (e.g., surgeon chose a different approach intraoperatively).
Sample appeal-letter language for CARC 197
[Provider letterhead] Re: Appeal of CARC 197 — Claim #{claim_number} Member: {member_name} · Member ID: {member_id} Date(s) of Service: {dos} On {remittance_date} this claim was adjusted with CARC 197: "Precertification/authorization/notification/pre-treatment absent." We respectfully request reconsideration. The X12 External Code List definition of CARC 197 does not apply to this claim for the following reasons: 1. [Cite the clinical / coding / policy fact that rebuts the adjustment] 2. [Cite the supporting documentation attached — op note, EOB, LCD/NCD citation, NCCI edit indicator, modifier rationale] 3. [Cite the payer's own policy where applicable] Attached: {list supporting documents} Please process payment under the member's benefits. If additional information is required, contact the billing office at {provider_phone} or {provider_email}. Sincerely, {billing_manager_name}, {credentials}

Edit the bracketed fields before sending. This template is a starting point; a payer-specific appeal form may still be required — check the provider portal first.

Payer-specific notes

Payer-specific behavior for CARC 197 publishes here as the QuickIntell anonymized denial ETL ingests sufficient volume. In the meantime, consult the payer directory for the relevant provider manual and appeal form.

How common is CARC 197?

Search demand rank
#11

Out of 306 seeded CARCs, ranked by combined US monthly search volume for "CARC 197", "CO-197 denial", and "denial code 197".

Platform frequency
Pending ETL

Platform frequency ranks publish once the anonymized denial-rate pipeline reaches the publication threshold (strategy §12 Phase 2).

How QuickRCM prevents CARC 197

QuickRCM catches the root causes above before the 837 leaves the clearinghouse:

  • Claim-scrub rules fire on every root cause listed above — the scrub references the same X12 CAS segment logic that drives the denial, so what the payer checks, QuickRCM checks first.
  • When a denial lands, QuickRCM routes it to the correct worker with the documentation bundle already attached (op note, LCD citation, modifier rationale, EOB, primary 835).
  • Appeal templates tuned to each CARC (including this one) pull the supporting facts from the claim and fill the bracketed fields automatically.
See QuickRCM →Book a demo

Frequently asked questions — CARC 197

What does CARC 197 mean?

CARC 197 is an X12 Claim Adjustment Reason Code. The official definition is: "Precertification/authorization/notification/pre-treatment absent." In plain English, the payer is telling you cARC 197 is a prior-authorization denial — the payer required precert/PA/notification for this service and does not have one on file. This is one of the most commonly appealable CARCs, and success depends on whether a PA was actually obtained (and not linked to the claim) or was never obtained. For services where retro-authorization is allowed, file immediately; for services where it is not, appeal hinges on medical-necessity and emergent-circumstance arguments.

How do I resolve a CARC 197 (CO-197) denial?

Start with the most common root cause: No prior authorization was obtained before the service. First step: If a PA was obtained, locate the authorization number and submit a corrected claim with it populated. See the full remediation and appeal checklist on this page before filing a formal appeal.

Is CARC 197 patient responsibility?

No — CARC 197 is typically carried under CO (Contractual Obligation) or OA (Other Adjustment), which means it is the provider's responsibility, not the patient's. Do not bill the patient unless the 835 CAS group code is PR.

What does CARC 197 look like on an EOB or 835 remittance?

On the 835 ERA, CARC 197 appears in Loop 2110 CAS segment as "CAS*CO*197*{amount}". On a paper EOB the same code prints in the Adjustment/Denial Reason column with the X12 description: "Precertification/authorization/notification/pre-treatment absent." — usually paired with one or more RARC remark codes in the same remittance line for additional context.

Which RARC is paired with CARC 197?

CARC 197 is commonly observed with RARC M62, N351. The RARC narrows the reason — for example, pointing at a missing modifier, an LCD citation, or a specific policy. Fix the underlying CARC first; the RARC usually clears with the corrected claim.

Disclaimer

This page is operational reference for medical-billing professionals. It is not legal, clinical, or contractual advice. X12 code descriptors are maintained by the X12 External Code Lists; always verify against the current X12 release and the payer's own published policy before submitting or appealing a claim.