Appeal a denied health insurance claim with an AI-drafted letter

Turn a denial letter into a detailed, evidence-based appeal using a chatbot or a free AI appeal tool.

Part of: How to lower your prescription drug costs

Reported outcomeDenied medication approved on appealAs reported by Reddit r/Narcolepsy. Results vary.

Cost Free option availableYou can do this for $0. Some tools offer paid upgrades you don't need.

Time (estimate)1–3 hrs

Difficulty (estimate)InvolvedSeveral steps or follow-ups over days or weeks.

Interactive

Build my prompt

Fill in what you know and the text below updates as you type. Everything stays in your browser: nothing is saved, sent or tracked. Leave out account numbers and SSNs.

Your personalized prompt

Act as a patient advocate. My health insurer ([Insurer / plan]) denied [Treatment, test or drug denied] with this reason: "[Denial reason]". My relevant history: [Relevant history]. Expedited review needed: [Is waiting dangerous to your health?]. My plan says: "[PASTE RELEVANT PLAN LANGUAGE]". Draft a formal internal appeal that 1) restates the denial, 2) rebuts each stated reason with my history and the plan's own language, 3) cites widely accepted clinical guidelines (list each source so I can verify it), 4) requests expedited review if applicable, and 5) notes my right to an external review. Keep it under two pages and flag anything my doctor should confirm.

Internal appeal letter (starting draft)

Template, not legal or financial advice. Check every fact, date and amount, add your own details, and keep a copy of what you send.

[Your name]
[Member ID: write on the printed copy only]
[Date]

[Insurer / plan], Appeals Department

Re: Request for internal appeal, claim/reference [Claim / reference number], denial of [Treatment, test or drug denied]

I am appealing the denial of [Treatment, test or drug denied]. The stated reason was: "[Denial reason]"

Why this should be covered:
[Relevant history]

[Point-by-point response to each denial reason, using your plan language]
[Enclosed: letter of medical necessity from Dr. ___ and relevant records]

Expedited review: [Is waiting dangerous to your health?].

Please send me a copy of the plan language and any clinical criteria used in this decision. If this appeal is denied, please tell me in writing how to request an external review.

Sincerely,
[Your name]

Follow these steps

Get the denial letter, your plan document (Evidence of Coverage) and the specific reason code.
Ask your doctor's office for chart notes and a letter of medical necessity.
Use an AI tool to draft an appeal that answers the denial reason point by point and cites your plan language and clinical guidelines.
Check every citation, have your doctor review it, and file before the deadline. Ask about an external review if the internal appeal fails.

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What to expect, and what to do if they say no

What to expect

Insurers usually must decide internal appeals within set time limits (shorter for urgent and pre-service requests). Check your denial letter.
A letter of medical necessity from your doctor is often what makes the difference.

If they say no

Request an external review by an independent reviewer. The denial letter explains how.
Ask your doctor to request a peer-to-peer review with the insurer's medical director.
Contact your state's consumer assistance program or insurance department for free help.

What happened when people tried it

Reported The patient reports the insurer approved Xywav after review by a medical director.

What the AI did: After an insurer denied the narcolepsy drug Xywav (wanting the patient to try Xyrem first), the patient used ChatGPT to draft a detailed appeal explaining why the lower-sodium drug was medically necessary, then refined it with clinical citations.

Source: Reddit r/Narcolepsy · 2024-09 · Self-reported; not independently verified
Reported Background reporting; no single dollar figure.

What the AI did: News coverage of patients using AI tools (Sheer Health, Counterforce Health and general chatbots) to fight denials and big bills.

Source: Stateline · 2025-11-20 · News reporting

Why this works

The problem: Insurers deny claims and prior authorizations, and most people never appeal because the letters are long and technical.

How AI helps: AI can read the denial reason, match it to your plan's language, organize your medical history and cite clinical evidence in an appeal letter for you and your doctor to review.

Tools & what they cost

Tool	Cost
Fight Health Insurance Generates editable AI appeal letters	Free (No cost at all) Free (optional donation; small fee only if they fax it for you)
Counterforce Health	Free (No cost at all) Free (nonprofit; focused on North Carolina)
Claimable Focused on medication denials	Costs money: $39.95 + shipping (You pay a set price or subscription) $39.95 plus shipping, or free through some support partners
ChatGPT	Free option available (Paid upgrades exist, but the free version works for this) Free tier; paid plans available

What do these labels mean?

Free No cost at all.
Free option available Paid upgrades exist, but the free version works for this.
Costs money You pay a set price or subscription.
Takes a cut of savings Charges a percentage of what it saves you.
Time · Difficulty Our estimates for a typical first try, not guarantees.
Reported What the linked source says happened, often self-reported. Your results will vary.

Watch out for

AI can invent citations. Verify every guideline and study before sending.
Deadlines matter. Internal appeals often have to be filed within a set window (commonly 180 days for many plans), so check your plan.
Health information is sensitive. Share only what's needed.

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Sources

Last verified 2026-10-19. Not financial, legal, tax or medical advice. Disclaimer.