Who should file the appeal, the patient or the doctor?

Both, ideally. The patient files the member appeal, and the prescriber sends a letter of medical necessity. Prescriber offices handle prior authorizations and appeals constantly.

Guide · Updated August 2026

GLP-1 Insurance Appeal Letter Template: Copy, Fill In, Send

Q: Does appealing a GLP-1 insurance denial actually work?

Often enough to be worth an hour of your time. A substantial share of denials are overturned when patients actually file, and appeals with physician support letters do best. Most denials are never appealed at all.

Insurance denied your Wegovy, Zepbound, or Mounjaro prescription. That denial is not the end. Plans reverse a meaningful share of denials on appeal, and most people never file one. This guide gives you a copy-paste appeal letter template, the documents to attach, and the deadlines that matter.

Before You Appeal: Read the Denial Letter

Your denial letter (or Explanation of Benefits) states the reason code. The appeal strategy depends on it:

Denial Reason	What It Means	Your Angle
Not medically necessary	Plan disputes you need it	Attach BMI history, comorbidities, doctor’s letter
Step therapy required	Try cheaper options first	Document past diet programs, phentermine, metformin attempts
Prior authorization missing	Paperwork never filed	Ask your prescriber to file the PA, not an appeal
Excluded benefit	Plan does not cover weight loss drugs at all	Appeal is hard. Argue a covered indication or switch strategy
Quantity or dose limit	Plan caps the fills	Prescriber letter explaining the titration schedule

One of these is not like the others. If weight loss medication is an excluded benefit in your plan documents, an appeal rarely wins, and your energy is better spent on the routes in our copay card and assistance guide or an employer plea during open enrollment. For everything else, appeal.

The Two Levels of Appeal

Level 1, internal appeal. You (or your prescriber) ask the plan to reconsider. Deadline is usually 180 days from the denial. The plan must answer within 30 days for a medication you have not started, faster if your doctor marks it urgent.

Level 2, external review. If the internal appeal fails, federal law gives you the right to an independent external review for medical-necessity denials. The reviewer does not work for your insurer, and their decision binds the plan.

Most people quit after the first denial. The system counts on that.

The Appeal Letter Template

Copy this, replace the bracketed parts, and send it to the appeals address on your denial letter. Ask your prescriber to send a supporting letter too. Appeals with a physician letter are far stronger than appeals without one.

[Your name]
[Address]
[Member ID] | [Group number]
[Date]

[Insurance company name]
Appeals Department
[Address from your denial letter]

Re: Appeal of coverage denial for [medication name], claim/reference number [number from denial letter]

Dear Appeals Reviewer,

I am appealing your denial dated [date] of coverage for [medication name], prescribed by [prescriber name, credentials] on [date]. The denial letter states the reason as [quote the exact reason].

This medication is medically necessary for me. My relevant history:

1. My BMI is [number], documented on [date]. [If applicable: I also have the following diagnosed conditions: type 2 diabetes / prediabetes / hypertension / high cholesterol / sleep apnea, diagnosed on (dates).]

2. I have attempted the following supervised weight management approaches without lasting success: [list programs, medications, and date ranges. Examples: a 6-month medically supervised diet program in 2024, metformin from (date) to (date), a commercial program from (date) to (date)].

3. My prescriber has determined that [medication name] is the appropriate treatment based on my history and the FDA-approved indication for chronic weight management in patients with BMI of 30 or higher, or 27 or higher with at least one weight-related condition.

[Medication name] is FDA approved for exactly my situation. Denying coverage contradicts the plan's obligation to cover medically necessary treatment for my documented conditions.

I have enclosed: the denial letter, a letter of medical necessity from my prescriber, and my relevant medical records. Please reconsider this denial. If you uphold it, please provide the clinical criteria used, the credentials of the reviewer, and instructions for external review.

Sincerely,
[Your name]

What to Attach

The denial letter. Always include a copy.
A letter of medical necessity from your prescriber. This is the single most important attachment. Ask their office. Most prescribers have a template and do this weekly.
Records that prove the story. BMI readings over time, lab results (A1C, lipids), diagnosis codes, and documentation of past weight loss attempts.
The FDA indication. One line quoting the label indication for your BMI and conditions.

Deadlines That Matter

You typically have 180 days from the denial to file an internal appeal.
The plan owes you a decision within 30 days for a drug you have not started, 60 days for reimbursement of one you paid for.
External review requests are usually due within 4 months of the final internal denial.

Check your denial letter and plan documents. Some plans run shorter clocks.

If the Appeal Fails

Request the external review. It is free and independent.
Ask your prescriber about an alternative the plan does cover. A different GLP-1 sometimes sits on a better tier. Our copay card guide covers what the manufacturer cards actually pay in 2026.
Compare cash-pay routes. Manufacturer direct programs and licensed telehealth providers are covered in our cheapest GLP-1 guide.
At open enrollment, compare every plan you are offered specifically on GLP-1 coverage.

FAQ

Does appealing actually work?

Often enough to be worth an hour of your time. Published analyses of insurance appeals across categories consistently show a substantial share of denials overturned when patients actually file, and appeals with physician support letters do best. Most denials are never appealed at all.

Who should file, me or my doctor?

Both, ideally. You file the member appeal with the template above, and your prescriber sends the letter of medical necessity. Prescriber offices handle prior authorizations and appeals constantly, so ask directly.

Can I appeal if my plan excludes weight loss drugs entirely?

You can, but benefit exclusions are much harder to overturn than medical-necessity denials. If you have type 2 diabetes, ask your prescriber whether a GLP-1 approved for diabetes fits your situation, since diabetes coverage is usually not excluded.

What is an expedited appeal?

If waiting the standard 30 days would seriously jeopardize your health, your doctor can request an expedited appeal. Plans must decide those within 72 hours.

Guides:

Tools:

GLP-1 Cost Estimator