How do you appeal a GLP-1 insurance denial?

A GLP-1 insurance denial appeal starts with the denial letter. Your plan has to tell you why it said no, and how you can dispute it. On most private plans you then have 180 days to file an internal appeal (rules checked 10/18/2026). After that, an outside reviewer can overrule the plan.

Medicare Part D runs on shorter clocks: 65 days to ask your plan to look again. Below are the steps, the papers to gather, and the deadlines for each plan type. This is how the rules read, not legal advice. Your own plan's documents set the exact terms.

Why did your plan say no?

Start with the reason, because it decides how good your odds are. The denial notice should name it. It may come from your plan or from its pharmacy benefit manager, the company many plans hire to run the drug benefit.

Most GLP-1 denials fall into two groups. The first is a rule you didn't meet. That includes prior authorization, where your prescriber has to show you meet the plan's written criteria before it pays. It also includes step therapy, where you try a cheaper drug first, and quantity limits.

The second group is a flat exclusion: the plan doesn't cover weight-loss drugs at all. You can still appeal that internally. But outside review is built for a different kind of dispute.

HealthCare.gov lists the denials that can go to external review. The first is Any denial that involves medical judgment where you or your provider may disagree with the health insurance plan. A denial for not meeting prior authorization criteria usually fits that. A benefit your plan never covered may not.

What documents do you need for the appeal?

Gather these before you write anything:

• The denial letter or Explanation of Benefits. It has your claim number and the plan's reason.
• The rule the plan used. Ask for it. For employer plans, the federal claims rule lets you get upon request and free of charge, reasonable access to, and copies of, all documents, records, and other information relevant to the claimant's claim for benefits (29 CFR 2560.503-1).
• A letter from your prescriber. HealthCare.gov's internal appeals page suggests sending extra information such as a letter from the doctor.
• Chart notes that match the criteria. If the denial says a requirement wasn't met, send the records that show it was.
• Your plan's own appeal form, if it has one. HealthCare.gov says you can also write a letter with your name, claim number and insurance ID number.
• A call log. Write down every call. HealthCare.gov suggests keeping Notes and dates from any phone conversations you have with your insurance company or your doctor that relate to your appeal.

Keep your originals and send copies. Under the same federal rule, the plan has to weigh everything you send, even if it wasn't part of the first decision.

How long do you have, and how fast must the plan answer?

It depends on the plan type. Here are the deadlines for a drug you haven't filled yet, as the rules read on 10/18/2026:

Appeal deadlines by plan type, for a drug not yet received. Checked 10/18/2026. Your denial letter and plan documents give your exact dates.

Plan type	File appeal within	Plan decides within	Outside review
Marketplace or other individual plan	180 days	30 days; urgent cases as fast as your condition requires	File within 4 months; decided within 45 days, or 72 hours if expedited
Employer plan, insured or self-funded	At least 180 days	30 days (or 15 days per level if the plan has two); urgent: 72 hours	Plans that aren't grandfathered: same 4-month window to file
Medicare Part D plan	65 days	7 days; expedited: 72 hours	Independent Review Entity: file within 65 days; decided within 7 days, or 72 hours if expedited
Medicare GLP-1 Bridge	None given in CMS's prescriber guide	Prior authorization answer within 72 hours	Prescriber can resubmit for re-review

Sources for this table

Source	What it says	Date checked	Link
HealthCare.gov, Internal appeals	File within 180 days of the denial notice; appeal completed within 30 days for a service not yet received	Checked 10/18/2026	Open: HealthCare.gov, Internal appeals
HealthCare.gov, External review	Written request within 4 months; standard review decided within 45 days, expedited within 72 hours	Checked 10/18/2026	Open: HealthCare.gov, External review
29 CFR 2560.503-1, eCFR (Department of Labor claims rule)	Group health plans give at least 180 days to appeal; pre-service appeal decided within 30 days (15 per level with two levels); urgent within 72 hours	Checked 10/18/2026	Open: 29 CFR 2560.503-1
29 CFR 2590.715-2719, eCFR (Department of Labor rule)	External review request may be filed within four months of the denial notice	Checked 10/18/2026	Open: 29 CFR 2590.715-2719
CMS, Redetermination by the Part D plan sponsor	File within 65 calendar days of the coverage determination notice; decision within 7 days, or 72 hours if expedited	Checked 10/18/2026	Open: CMS, Redetermination by the Part D plan sponsor
CMS, Reconsideration by the Part D Independent Review Entity	File within 65 calendar days of the plan's redetermination notice; decision within 7 days, or 72 hours if expedited	Checked 10/18/2026	Open: CMS, Reconsideration by the Part D Independent Review Entity
CMS, Medicare GLP-1 Bridge: information for prescribers (June 2026)	Prior authorization approval or denial within 72 hours of submission; a denial believed to be in error can be resubmitted for re-review	Checked 10/18/2026	Open: CMS, Medicare GLP-1 Bridge information for prescribers

How does an appeal work on a marketplace plan?

You file an internal appeal first. HealthCare.gov puts the deadline plainly: You must file your internal appeal within 180 days (6 months) of receiving notice that your claim was denied.

Individual plans get one round. Under 45 CFR 147.136, an insurer selling individual coverage must provide for only one level of internal appeal before issuing a final determination.

If the answer is still no, the final letter has to tell you how to ask for external review. You have 4 months to file it. An independent reviewer decides, and HealthCare.gov says Your insurer is required by law to accept the external reviewer’s decision.

Your state may run the review, or the federal government may. A federal review costs you $0. A state process can charge a filing fee of up to $25, which is refunded if you win, waived for hardship and capped at $75 a plan year. The table below shows each one.

Your state's Consumer Assistance Program may help you file, or even file for you, per HealthCare.gov.

How is an employer plan appeal different?

Most job-based plans follow the federal benefits law known as ERISA. The Department of Labor's claims guide says you get at least 180 days to appeal. The plan's own rules can give you more.

Your plan's own papers matter more here, so check the summary plan description for its appeal steps. Some plans have two levels. Under 29 CFR 2560.503-1, a plan with two levels gets 15 days for each one on a drug you haven't received.

Outside review depends on how the plan is funded. If your employer buys insurance, the insurer usually follows your state's review process. If the employer pays claims itself (self-funded), the plan often uses the federal process instead. In that process the plan must hire independent reviewers, and 29 CFR 2590.715-2719 bars them from charging you.

One catch: the federal process doesn't take denials about whether you're eligible for the plan at all. Your denial notice should spell out which process applies.

The Labor Department adds that you normally have to finish the plan's appeal steps before going to court. Its benefits advisors take questions at 1-866-444-3272.

How do Medicare Part D appeals work?

Part D has its own ladder, and the first rung comes before the appeal. Asking your plan to cover a drug is called a coverage determination. Asking it to waive a rule like prior authorization is an exception request.

For an exception, your prescriber's statement does the heavy lifting. CMS's exceptions page says Exceptions requests are granted when a plan sponsor determines that a requested drug is medically necessary for an enrollee. The plan's clock doesn't start until that statement arrives.

If the plan says no, you ask it to reconsider. That step is called redetermination. Per CMS, Redetermination requests must be filed with the plan sponsor within 65 calendar days from the date of the notice of the coverage determination.

After that, an outside Independent Review Entity can review it. You get another 65 days to file, and later levels go to a judge. Each decision letter explains the next step.

The Medicare GLP-1 Bridge works differently. CMS runs it outside Part D plans, with its own prior authorization. Its prescriber fact sheet gives only one route after a no: If you believe a denial was made in error, you may resubmit the prior authorization for re-review.

What if you can't wait for a decision?

Ask for an expedited review. Under the federal claims rule, an employer plan must decide an urgent appeal within 72 hours. Part D plans have the same 72-hour limit for expedited redeterminations.

On private plans, urgent cases can skip ahead. HealthCare.gov says If you have an urgent health situation, you can ask for an external review at the same time as your internal appeal.

What does it cost to pay cash while you appeal?

Some people buy the drug themselves while they wait. These are the manufacturer self-pay prices, checked 10/18/2026:

Read the terms before you choose this route. Novo's self-pay terms say you agree not to seek payment or accept reimbursement for any out-of-pocket costs from any insurance. So winning the appeal later may not get those months paid back. The terms also say the cash price won't count toward your deductible.

For the full price breakdown, see our Wegovy price check. If you plan to pay from a health savings account, our guide to using an HSA or FSA for Wegovy covers how.

How we checked these rules

On 10/18/2026 we read the HealthCare.gov and CMS appeal pages, the federal rules on eCFR and the Labor Department's claims guide. We also checked the Novo and Lilly price pages. The tables above list each source and the date. If a deadline or price changes, we'll date the correction on this page.