The GLP-1 that changes your life is useless in a pharmacy you can’t afford. Coverage — not the prescription itself — is where treatment most often stalls. The good news: the process has predictable steps, and denials are frequently reversible. Here’s the playbook.

Step 1: Know what your plan actually covers

Before anything else, find out whether your plan covers your specific drug for your specific reason. The distinction matters enormously because of off-label rules:

Diabetes GLP-1s (Ozempic, Mounjaro) are widely covered for diabetes.
Weight-management GLP-1s (Wegovy, Zepbound) are covered for weight by some plans and excluded by others — many employer plans still carve out weight-loss drugs entirely.
Using a diabetes brand for weight loss is off-label and usually won’t be covered.

Call the number on your insurance card or check the plan formulary. Two questions get you the whole picture: “Is [drug] on my formulary for [indication]?” and “Does it require prior authorization or step therapy?” Knowing this upfront saves weeks.

What plans typically require to qualify

There’s no single national rule, but weight-management coverage criteria cluster around the same checklist:

BMI ≥ 30, or BMI ≥ 27 plus at least one weight-related condition (hypertension, type 2 diabetes or prediabetes, sleep apnea, high cholesterol) — mirroring the FDA label criteria.
Documented participation in lifestyle measures — many plans want evidence of diet/exercise attempts, sometimes a formal program, sometimes for a specified number of months.
Step therapy on some plans: trying a cheaper covered option first.
Ongoing criteria for renewals: many plans re-authorize every 6–12 months and want to see weight response (commonly ≥5% loss) to continue coverage — which makes your weight record matter after approval, not just before it.

If your employer’s plan excludes weight-loss medication entirely, no prior authorization can fix that — but it’s worth asking HR whether coverage is available as an opt-in benefit, and noting that Wegovy and Zepbound now also carry non-weight indications (cardiovascular risk reduction and obstructive sleep apnea, respectively) that some plans cover on a separate track. That’s a prescriber conversation.

Does Medicare or Medicaid cover GLP-1s?

Medicare Part D has long been barred from covering drugs prescribed for weight loss alone — but it can cover GLP-1s for diabetes (Ozempic, Mounjaro) and for other FDA-approved indications, like Wegovy for cardiovascular risk reduction in people with established heart disease, or Zepbound for obstructive sleep apnea. Whether your Part D plan actually lists them, and at what tier, varies by plan.
Medicaid coverage of weight-management GLP-1s varies by state — some cover with prior authorization, many don’t.

Rules in this area have been moving quickly; treat anything you read (including this) as a starting point and verify with your plan.

Step 2: Prior authorization

Most GLP-1 coverage requires prior authorization — your prescriber justifying the drug before the plan pays. Insurers typically want some mix of:

A qualifying diagnosis or BMI threshold, as above.
Documented prior attempts — a history of diet/exercise efforts, or trying a cheaper drug first (“step therapy”).
Your prescriber’s submission with supporting records.

A prescriber’s office that handles these routinely is your biggest asset — they know exactly what each insurer wants. Typical turnaround is a few days to two weeks; if you hear nothing, call both the office and the insurer, because PAs do get lost between fax machines.

Step 3: Bring your own evidence

This is where you can actively help, and where tracking pays off. Documentation that strengthens a PA or appeal:

Weight history over time.
BMI and any weight-related conditions (hypertension, sleep apnea, prediabetes, high cholesterol).
Previous weight-loss attempts — programs, medications, efforts you’ve made.

A clear, dated record of your weight and treatment history is exactly the kind of evidence these requests run on. If you’ve been tracking (Glu keeps this history in one exportable place), you can hand your prescriber the documentation instead of reconstructing it from memory — and the same record satisfies the renewal reviews later.

Step 4: Appeal a denial — they get overturned

A denial is not the end. Prior authorizations are denied and then successfully appealed all the time. If you’re denied:

Ask for the specific reason in writing.
Have your prescriber submit an appeal addressing that reason — often with a letter of medical necessity.
Escalate to an external/independent review if the internal appeal fails; many plans are required to offer one.

Persistence genuinely wins here. The first “no” is frequently a paperwork gap, not a final verdict — a missing BMI reading, an undocumented lifestyle program, a box unticked.

When insurance still says no

If coverage truly isn’t available:

Manufacturer savings cards can substantially lower the cost of a brand drug for people with eligible commercial insurance (note: government plans like Medicare/Medicaid are usually excluded).
Cash-pay and direct-to-patient options have expanded as the market shifts — both Novo Nordisk and Eli Lilly now sell some products at reduced self-pay prices through their own pharmacy channels, and self-pay vial options can undercut the list price of pens substantially.
Weigh the risks before turning to compounded versions, which are cheaper but not FDA-approved.

The bottom line

GLP-1 coverage is a process, not a coin flip: confirm what your plan covers, know the qualifying criteria before the PA goes in, back it with your own weight and health history, and appeal if denied. Most of the people who get covered aren’t luckier — they’re more persistent and better documented. Being organized about your history is the part you control.

Sources: KFF analyses of GLP-1 coverage (employer, Medicare, and Medicaid coverage landscape); Wegovy and Zepbound prescribing information (indication criteria); manufacturer coverage and savings resources (Novo Nordisk, Eli Lilly official sites). Coverage rules change frequently — verify current terms with your insurer.

How to Get Your GLP-1 Covered by Insurance