APPEAL
CO-197 Appeal Letter
Appeal template for CARC CO-197 (precertification/authorization absent). Includes auth reference documentation and retro-auth language.
CO-197 Appeal Letter
Practice Letterhead
Payers use letterhead to verify the appeal originates from the billing entity on file. Missing or mismatched letterhead is a common reason appeals are returned unprocessed.
Re: Line with CARC CO-197
Naming the specific CARC code in the subject line routes the appeal to the correct review queue. Generic subject lines often land in general correspondence and miss appeal deadlines.
Authorization Number Reference
CO-197 denials frequently occur when a valid auth exists but was not transmitted on the claim. Leading with the auth number gives the reviewer the fastest path to re-adjudication.
Option A/B/C Structure
CO-197 has three distinct root causes: auth not transmitted, retro-auth needed, or emergent exception. Selecting the correct option prevents the appeal from being denied for mismatched rationale.
Medical Necessity Paragraph
Even when the denial is procedural (missing auth), including medical necessity documentation strengthens the appeal if the payer escalates to clinical review.
NCD/LCD Reference Line
Citing the specific National or Local Coverage Determination shows the reviewer that the service meets Medicare coverage criteria, reducing the chance of a secondary clinical denial.
Appeal Deadline Reference
Stating the filing window and EOB date on record creates a paper trail that protects against payer claims of untimely filing.
Enclosed Documentation List
Numbered enclosures prevent the payer from denying on grounds of incomplete submission. If an enclosure is missing, the reviewer can request the specific item instead of rejecting the entire appeal.
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