Copy · fill in · send
Appeal a denied health insurance claim — with a letter you can actually send.
A denial is the start of a process, not the end of it. These free, copy-paste templates walk the whole path — the internal appeal, the ERISA request for your claim file, the expedited route when care is urgent, the external/independent review, and appeals tailored to the exact reason on your denial — each with what to attach, the deadline to watch, and the rule it leans on.
16 letters & guides
- Start here Health Insurance Appeal Deadlines & Timeframes (ACA, ERISA, Medicare, Medicaid) Free guide to health insurance appeal deadlines: ACA plans generally allow 180 days to file an internal appeal and 4 months to request external review. Compare timeframes.
- Start here How to Read a Health Insurance Denial Letter (Codes, Deadlines & Next Steps) Free guide to reading a health insurance denial letter: find the denial reason, code, appeal address, and deadline. ACA plans generally give you 180 days to appeal.
- Start here Which Appeal Process Applies to Your Plan (ACA, Employer/ERISA, Medicare, Medicaid) Free guide to finding your health insurance appeal process. ACA plans generally allow 180 days to appeal; ERISA, Medicare, and Medicaid each use a different path.
- Internal appeals Request an Expedited (Urgent) Appeal of a Denial Free copy-paste expedited-appeal letter for an urgent health insurance denial. Urgent appeals are typically decided within about 72 hours. Get your doctor to certify urgency.
- Internal appeals Appeal a Denied Health Insurance Claim (Internal Appeal Letter) Free copy-paste internal-appeal letter for a denied health insurance claim. ACA plans generally allow 180 days to file. Cite the denial reason, attach support, send.
- Internal appeals Request a Peer-to-Peer Review of a Denial Free copy-paste letter to request a peer-to-peer review, where your doctor speaks directly with the plan's medical director. Often must be requested within a short window.
- Internal appeals Request Your ERISA Claim File & Plan Documents Free copy-paste letter to request your ERISA claim file, plan provisions, internal guidelines, and SPD — free of charge. Plan documents are generally due within 30 days.
- Denial-reason appeals Appeal an 'Experimental / Investigational' Denial Free copy-paste letter to appeal an 'experimental or investigational' denial — counter with published evidence and FDA status. These are often reversed on external review.
- Denial-reason appeals Request a Prescription Drug Formulary Exception Free copy-paste letter to request a formulary exception for a non-covered or higher-tier drug. Medicare Part D standard decisions are due ~72 hours. Fill in, send.
- Denial-reason appeals Appeal a 'Not Medically Necessary' Denial Free copy-paste letter to appeal a 'not medically necessary' denial — cite the plan's own definition and your provider's letter. ACA plans generally allow 180 days.
- Denial-reason appeals Appeal an Out-of-Network / Network Adequacy Denial Free copy-paste letter to appeal an out-of-network denial and get in-network cost-sharing. ACA plans generally allow 180 days. Copy, fill in, send.
- Denial-reason appeals Appeal a Prior Authorization Denial Free copy-paste letter to appeal a prior authorization denial — a PA denial is a coverage decision, not a medical judgment. ACA plans generally allow 180 days to appeal.
- Denial-reason appeals Request a Step Therapy ('Fail First') Exception Free copy-paste letter to request a step therapy exception — skip 'fail first' when you already failed, can't take, or are stable on the drug. Many states require an override.
- Denial-reason appeals Appeal a Timely Filing Denial (Provider Filed Late) Free copy-paste letter disputing patient liability when a provider filed your claim late. A provider's timely-filing error is usually written off, not billed to you.
- External review & complaints Request an External (Independent) Review After a Denial Free copy-paste letter to request an external review by an Independent Review Organization. For ACA plans the IRO decision is binding. Usually due within 4 months.
- External review & complaints File a Complaint With Your State Insurance Department Free copy-paste complaint to your state Department of Insurance over an unfair denial. Self-funded plans go to DOL/EBSA; Medicare to 1-800-MEDICARE. Fill in, send.
Why this exists
Most denied claims are never appealed — and a large share of appeals win.
Insurers deny claims for reasons that are frequently fixable: a missing prior authorization, a coding mismatch, a "not medically necessary" call made without your records, or a step-therapy rule that doesn't fit your case. Yet most people never push back, because the appeal process is buried in fine print and the hardest part is simply knowing what to write. Denial Appeal turns each step into a plain, fill-in-the-blanks letter — so you can answer the denial on the record, on time, and in the language the plan responds to.
How it works
Read the denial, pick the letter, send it on time
- Decode the denial. Find the denial reason/code and the appeal deadline on your letter or EOB — start with how to read a denial and the deadline table.
- Pick the matching letter from the full list — by stage (internal, external) or by the exact reason you were denied.
- Fill in the
[bracketed]fields, attach what the guide lists (denial letter, records, letter of medical necessity), and send on the record — certified mail or the plan's appeal channel — before the deadline. Keep a dated copy.
FAQ
Frequently asked questions
Are these appeal letters really free?
Yes. Every letter on denialappeal.pages.dev is free to read and copy, with no account, paywall, or sign-up. The site may carry affiliate links to related services, which never change what you pay or what we publish.
Is this legal, medical, or insurance advice?
No. These are general-purpose educational templates, not advice about your specific claim and not a substitute for a licensed attorney, your physician, or a patient advocate. Always confirm the appeal deadline, address, and process that currently apply to your plan before relying on a letter.
How long do I have to appeal a denied claim?
For most plans under the Affordable Care Act you generally have 180 days from the date of the denial notice to file an internal appeal, and roughly 4 months to request an external review afterward. But the controlling deadline is the one printed on your denial letter or Explanation of Benefits — Medicare, Medicaid, and some employer plans run their own clocks, so always read the notice.
What is the difference between an internal appeal and an external review?
An internal appeal asks your insurer to reconsider its own decision. If it still denies, an external (independent) review sends your case to an Independent Review Organization with no stake in the outcome; for most ACA plans the IRO decision is binding on the insurer. You usually must finish the internal appeal before you can request the external review.
Can I get the documents the insurer used to deny my claim?
Often, yes. If your coverage is an employer (ERISA) plan, the "full and fair review" rules let you request — free of charge — the claim file, the specific plan provisions, and any internal rule, guideline, or expert opinion the plan relied on. The ERISA claim-file request letter does exactly that, and it frequently exposes weak grounds for the denial.
My treatment is urgent — is there a faster appeal?
Yes. When waiting the standard timeframe could seriously jeopardize your health, you can request an expedited (urgent) appeal, and you can ask to run the internal appeal and external review at the same time. Urgent decisions are typically due within about 72 hours. The expedited-appeal letter explains how to invoke it.