By Alsen Walker · Editorially reviewed on 25 August 2026 · Not medically reviewed by a clinician

Whether your insurance covers a GLP-1 comes down to three things: whether your plan includes anti-obesity medication at all, whether you meet the written clinical criteria, and whether your prescriber documents it properly. Most refusals are documentation failures rather than eligibility failures, which means most of them are worth contesting.

Start here: is the drug class covered at all

This is the question that determines everything else, and it is the one people skip.

Anti-obesity medication is an optional benefit. Many employers exclude the entire category, and where that is the case no amount of clinical documentation will produce an approval, because there is no coverage to approve against. Appeals do not overturn benefit exclusions.

Find out by calling the number on your card and asking specifically whether anti-obesity medications are covered and whether your drug is on the formulary. Take a reference number.

How to Get Wegovy Covered by Insurance Employer Formulary Exclusions: Why Your Plan Dropped Wegovy

If it is covered: meeting the criteria

Coverage criteria track the FDA label. A BMI of 30 or above qualifies on its own; between 27 and 29.9 you need a documented weight-related condition.

Which BMI the plan uses matters more than people expect, since many assess your highest documented value rather than your current one. That protects people who have already lost weight.

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The documentation that decides it

Prior authorization is decided on what is written in your record, not on what is true about you.

The most common failure point is evidence of previous weight management attempts. Plans want dates, duration, method and outcome. “Patient has tried diet and exercise” is the phrase that gets requests pended.

Conditions must be coded, not merely known. A comorbidity your doctor has treated for years does not exist to a reviewer if it was never coded.

GLP-1 Prior Authorization: What Your Doctor Actually Has to Submit How to Document Failed Weight Loss Attempts for Prior Auth

When it is refused

The reason stated in the denial letter determines your route entirely, and they are not interchangeable.

Criteria not met or insufficient documentation is the most winnable, and usually means supplying what was missing. Step therapy has its own formal exception process. Benefit exclusion is a contract term, and your leverage is your employer at the next plan year rather than an appeal.

After internal appeals are exhausted, external review puts the decision to an independent reviewer whose determination binds the plan. It is free and it is underused.

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Medicare, Medicaid and other programmes

Medicare Part D is barred by statute from covering drugs used for weight loss. Coverage becomes possible only where a product carries a separate approved indication, such as cardiovascular risk reduction or obstructive sleep apnea, and even then the plan must have added it to its formulary.

Tricare and VA operate their own formularies with their own criteria. Marketplace plans vary by state, and metal tier tells you nothing about which drugs are on the list.

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Once you are approved

Approval is time-limited. Renewal is assessed against continuation criteria, which ask whether the drug worked rather than whether you qualified. Measured weights recorded at every visit are what make that renewal straightforward.

Watch for the expiry date yourself, because nobody else will. Most people discover a lapsed authorization at the pharmacy counter, mid-titration.

What to Do When Your GLP-1 Prior Auth Expires Continuation Criteria: Proving the Drug Is Working

When the pharmacy says no anyway

Usually a claims problem rather than a coverage problem. Ask for the rejection code, because the code determines the fix, and “not covered” is the counter staff’s summary rather than the system’s answer.

A frequent cause: your authorization is tied to a specific product code, so a new dose strength during titration can reject even though your approval is valid.

Why Your Pharmacy Says Not Covered When Your Plan Says It Is Quantity Limits on GLP-1 Prescriptions Explained

The principle underneath all of it

Insurers work from documents. Your clinical reality is only as good as what reaches the reviewer, and almost everything in this cluster is about closing that gap.

Ask for your plan’s written clinical policy for the drug. It tells you exactly what is being checked, and it is usually published.

Every guide in this cluster