---
name: denial-appeal-letter
description: Drafts first-level and second-level insurance claim appeal letters from a denial reason, the claim detail, and supporting documentation. Use when a medical billing team needs an appeal written fast without losing accuracy. A biller reviews and sends every letter.
---

# Claim Denial Appeal Letter

Turn a denial into a submitted appeal in minutes instead of the 45 minutes it usually takes —
without inventing a single fact.

## Absolute rules

1. **Every clinical statement must come from the supplied documentation.** If the appeal needs a
   fact you were not given, write `[MISSING: exact fact needed]` inline. Never fill a gap with a
   plausible-sounding clinical detail.
2. **Never cite a policy, guideline, or statute you were not given.** A fabricated citation
   destroys the appeal and the practice's credibility with that payer. If a citation would
   strengthen the letter, write `[CITATION NEEDED: what to cite]`.
3. **Address the actual denial reason.** A generic letter that does not engage with the specific
   CARC/RARC code will be denied again. Name the code and answer it directly.
4. **A human sends it.** You draft; a biller or coder reviews, fills the gaps, and submits.

## Before drafting, establish

- Denial code (CARC) and remark code (RARC), and what they actually mean
- Whether this is a **technical** denial (eligibility, timely filing, registration, missing
  modifier) or a **clinical** denial (medical necessity, level of care, experimental)
- The appeal deadline and which level of appeal this is
- What documentation is attached

Technical and clinical denials need completely different letters. Technical denials are won by
supplying the missing fact. Clinical denials are won by connecting the documented clinical picture
to the payer's own coverage criteria.

## Output format

```
[Practice letterhead placeholder]
[Date]

[Payer name]
Appeals Department
[Address]

RE: Appeal of claim denial
    Patient: [name]            Member ID: [id]
    Claim number: [number]     Date(s) of service: [dates]
    Denial code: [CARC] / [RARC]
    Billed amount: [amount]

To the Appeals Review Team,

[Paragraph 1 — what is being appealed and why, in one or two sentences.]

[Paragraph 2 — the denial reason, quoted, and precisely why it does not apply. For a technical
denial: supply the fact. For a clinical denial: walk the documented findings against the coverage
criteria, point by point.]

[Paragraph 3 — the supporting documentation enclosed, listed.]

[Paragraph 4 — the specific remedy requested: reprocess and pay claim [number] in the amount of
[amount]. Give a date by which a response is expected.]

Sincerely,
[Name, credentials, NPI, contact]

Enclosures: [list]
```

## Tone

Firm, factual, unemotional. No indignation, no rhetorical questions, no appeals to fairness.
The letter's only job is to make paying the claim the easiest action available to the reviewer.

Keep it to one page where the denial is technical. Clinical appeals may run to two.

## Quality check before handing over

- Does every clinical claim trace to supplied documentation?
- Is the specific denial code named and answered?
- Is the requested remedy explicit, with a dollar amount?
- Are there any `[MISSING:]` or `[CITATION NEEDED:]` markers left? Say so at the top of your reply
  so the reviewer cannot miss them.

## Privacy

Use de-identified claim data where your workflow allows. Where PHI is required, run only inside
tooling covered by a business associate agreement.