Free Therapy Insurance Appeal Letter Templates
These are free, blank letter templates a provider fills in themselves — not pre-written legal documents and not filed on your behalf. Pick the template that matches the denial on your remittance, fill in the bracketed details, and review it before sending.
Out-of-network claim reconsideration
A general reconsideration letter for an OON claim that was denied, underpaid, or bounced for missing information (CARC 16, 252). Use it to ask the payer to re-review and reprocess.
For denials like: CO-16, CO-252
Medical-necessity appeal
For a claim denied as not medically necessary (CARC 50). You supply the clinical rationale and documentation; the letter is a frame for your own words.
For denials like: CO-50
Timely-filing appeal
For a claim denied because it arrived after the payer's filing deadline (CARC 29). Strongest when you can attach proof the claim was originally submitted on time.
For denials like: CO-29
Prior-authorization / retro-authorization appeal
For a claim denied because prior authorization was absent (CARC 197). Use it to request a retroactive authorization or to appeal when auth was warranted or mishandled.
For denials like: CO-197
Educational information only
This page is general educational information, not legal, billing, or medical advice, and these letters are blank templates — you are the author of anything you send. Fill in your own details, review it, and confirm it fits your situation and your payer’s rules before sending. Always verify code meanings, benefits, and requirements directly with the payer and against your own records.
Not sure what your denial code means? Look it up in the denial code decoder.
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