What Medicare Part B covers for Wegovy
Medicare Part B does not routinely cover Wegovy (semaglutide) for weight loss alone. Part B covers prescription drugs only when they are injected in a doctor's office or hospital outpatient setting — and Wegovy is a self-injection you give yourself at home. Even then, Part B would need to determine the drug is medically necessary, which for weight loss is a high bar.
However, if you have type 2 diabetes, the picture changes. Wegovy's sister drug, Ozempic (also semaglutide), is approved for diabetes and may be covered by Part B when injected in a medical setting. Some people use Ozempic off-label for weight loss, but coverage depends on your specific situation and your doctor's documentation of medical necessity.
Medicare Part D (prescription drug coverage) is where most people find coverage for Wegovy if they have it. Part D plans vary widely — some cover Wegovy with a prior authorization, some cover it with high out-of-pocket costs, and some do not cover it at all. Your specific plan's formulary (the list of covered drugs) determines whether Wegovy is included and at what cost tier.
Key Takeaways
- Medicare Part B does not cover Wegovy because it is a self-injected medication you use at home, not one given in a medical office.
- If you have type 2 diabetes, Ozempic (the diabetes version of the same drug) may be covered by Part B when injected in a doctor's office or hospital.
- Medicare Part D plans have different rules for Wegovy coverage — some cover it with prior authorization, some charge high copays, and some do not cover it.
- You can call your Part D plan directly or check your plan's formulary online to find out whether Wegovy is covered and what your out-of-pocket cost would be.
- If your plan does not cover Wegovy, you may be able to appeal the decision or switch to a different Part D plan during the annual enrollment period.
How Medicare Part B and Part D handle prescription drugs differently
Part B covers drugs that are administered by a healthcare provider — injected or infused in a doctor's office, hospital outpatient department, or dialysis center. Part D covers drugs you pick up at a pharmacy or have delivered to your home, whether they are pills, inhalers, or self-injected medications.
Because Wegovy comes as a pre-filled pen that you inject yourself at home, it falls under Part D, not Part B. Part D is run by private insurance companies under contract with Medicare, so each plan sets its own rules about which drugs it covers and how much you pay.
If a drug is covered by your Part D plan, you typically pay a copay or coinsurance at the pharmacy. Wegovy is an expensive medication — the retail price is several hundred dollars per month — so your out-of-pocket cost depends on which tier your plan places it on and whether you have met your deductible.
What to check in your Part D plan's formulary
Your Part D plan's formulary is a document that lists every drug the plan covers. You can find it on your plan's website or request it by phone. When you look up Wegovy, the formulary will tell you whether it is covered and what tier it is on.
Tier 1 drugs (generic) have the lowest copay. Tier 2 (preferred brand-name) and Tier 3 (non-preferred brand-name) have higher copays. Tier 4 and Tier 5 are for specialty drugs and have the highest copays — Wegovy often lands here, meaning you could pay $250 to $500 or more per month even with coverage.
The formulary also tells you whether the drug requires prior authorization — a step where your doctor must submit paperwork to the plan explaining why you need it before the plan will pay. Some plans require this for Wegovy; others do not.
When your doctor may request prior authorization
Prior authorization is a common requirement for weight-loss drugs because Medicare and insurance plans want to confirm the drug is medically necessary. Your doctor will need to document that you have a BMI (body mass index) above a certain threshold, that you have tried other weight-loss methods, and sometimes that you have weight-related health conditions like high blood pressure or type 2 diabetes.
The prior authorization process usually takes a few days to a week. Your doctor's office submits the request, and the plan reviews it. If approved, the plan sends confirmation to your pharmacy, and you can fill the prescription. If denied, your doctor can appeal or discuss other options with you.
Even if your plan does not require prior authorization for Wegovy, it is worth having your doctor document the medical reason you are taking it. This creates a record in case the plan later questions the prescription or if you need to appeal a denial.
What to do if your Part D plan does not cover Wegovy
If your current plan does not cover Wegovy or the copay is unaffordable, you have several options. The first is to ask your doctor whether a generic alternative might work for you — though for weight loss specifically, there are limited options, and most are older medications.
The second option is to appeal the plan's decision. You can request a coverage information review, and if that is denied, you can file a formal appeal. Your doctor can support the appeal by providing medical documentation of why Wegovy is necessary for you.
The third option is to switch to a different Part D plan. You can do this during the annual enrollment period (October 15 to December 7 each year) or if you may have access to for a special enrollment period. When you compare plans, check the formulary for each one to see which covers Wegovy at the lowest cost.
Some people also look into manufacturer discount programs. Novo Nordisk, which makes Wegovy, offers a savings program that can reduce your copay if you meet certain income limits. Ask your pharmacy or doctor whether you may have access to.
The difference between Wegovy and Ozempic under Medicare
Wegovy and Ozempic contain the same active ingredient (semaglutide) but are approved for different uses. Ozempic is approved for type 2 diabetes; Wegovy is approved for weight loss in people without diabetes. This distinction matters for Medicare coverage.
If you have type 2 diabetes and your doctor prescribes Ozempic, Part B may cover it when given as an injection in a medical office. Some people with diabetes use Ozempic off-label for weight loss as well, and if your doctor documents both uses, Part B coverage may explore to the office-administered dose.
However, if you are using the medication primarily for weight loss and do not have diabetes, Part B will not cover it. In that case, you rely on Part D coverage, which depends on your specific plan.
Questions to ask your doctor and your insurance plan
Before you and your doctor decide on Wegovy, it is worth asking your Part D plan directly: Is Wegovy on your formulary? If yes, what tier is it on, and what would your copay be? Does the plan require prior authorization? Are there any quantity limits or step therapy requirements (meaning you have to try another drug first)?
Ask your doctor whether Wegovy is the right choice for your situation, whether there are lower-cost alternatives, and whether your doctor is willing to submit a prior authorization request if your plan requires one. If cost is a concern, ask whether the manufacturer's savings program might help or whether your doctor has samples you can try first.
If your plan denies coverage, ask your doctor to help you understand the reason and whether an appeal is worth pursuing. Sometimes a strong letter from your doctor can reverse a denial.
Frequently Asked Questions
Can I use my Medigap or Medicare Advantage plan to cover Wegovy instead?
Medigap plans do not cover prescription drugs at all — they cover gaps in Part A and Part B. Medicare Advantage plans (Part C) include prescription drug coverage built in, and some Advantage plans may cover Wegovy through their formulary. If you have Advantage, check your plan's formulary the same way you would for Part D.
What if I cannot afford the copay for Wegovy?
Novo Nordisk offers a copay savings program for people with commercial insurance and Medicare Part D. You may pay as little as $0 to $250 per month depending on your plan and income. Ask your pharmacy or doctor for the program details, or visit the Novo Nordisk website to see if you may have access to.
Will Medicare cover Wegovy if I have obesity but no other health conditions?
Coverage depends on your Part D plan, not on whether you have other conditions. However, plans are more likely to approve prior authorization if you have weight-related health problems like high blood pressure, sleep apnea, or type 2 diabetes. If you have only obesity, some plans may still cover it, but you should check your formulary first.
Can I switch Part D plans to get Wegovy coverage?
Yes, during the annual enrollment period (October 15 to December 7) you can switch to any Part D plan available in your area. Compare formularies to find plans that cover Wegovy at a lower cost tier. If you have a may have access to life event, you may be able to switch outside the enrollment period.
What happens if my doctor prescribes Wegovy but my plan denies it?
You have the right to request a coverage information review and then file a formal appeal if the review is denied. Your doctor can submit additional medical information to support the appeal. The appeals process typically takes one to two weeks, and you can ask for an expedited review if medically urgent.