Medicare's coverage of weight loss treatment is limited and conditional

Medicare covers weight loss drugs and bariatric surgery only in specific situations, and only after your doctor documents that you have obesity-related health problems. Medicare does not pay for weight loss programs, gym memberships, nutritionist visits, or drugs prescribed solely for weight loss without a medical reason. The coverage that does exist requires you to meet strict criteria and often involves prior approval from Medicare before treatment begins.

The main covered options are the drug semaglutide (Ozempic, Wegovy) for people with type 2 diabetes or heart disease, and bariatric surgery for people with a BMI of 35 or higher and obesity-related conditions. Even when these are covered, you typically pay 20 percent of the cost after your Part B deductible, and your doctor must document the medical reason for treatment in your chart.

Key Takeaways

  • Medicare covers semaglutide only if you have type 2 diabetes or heart disease, not for weight loss alone.
  • Bariatric surgery is covered when your BMI is 35 or higher and you have weight-related health conditions, but your doctor must get prior approval first.
  • Medicare does not pay for weight loss programs, nutritionist counseling, gym memberships, or over-the-counter diet products.
  • You will owe 20 percent coinsurance for covered drugs and surgery after you meet your Part B deductible.

Semaglutide and other weight loss drugs under Medicare

Medicare Part B covers semaglutide (the active ingredient in Ozempic and Wegovy) only when prescribed for type 2 diabetes or to reduce heart attack and stroke risk in people with heart disease. If your doctor prescribes it for weight loss without one of these conditions, Medicare will not pay. Your doctor must document in your medical record that you have one of these conditions and that semaglutide is medically necessary.

Other weight loss drugs like phentermine, phendimetrazine, and diethylpropion are not covered by Medicare at any dose or for any reason. GLP-1 drugs other than semaglutide (such as tirzepatide, sold as Zepbound for weight loss) are also not covered. If you take a covered drug, you pay 20 percent of the Medicare-approved amount after your Part B deductible is met, which means your out-of-pocket cost depends on the drug's price and your deductible status.

Bariatric surgery coverage and approval process

Medicare covers bariatric surgery (gastric bypass, gastric banding, or sleeve gastrectomy) when you meet all of these conditions: a BMI of 35 or higher, or a BMI of 30 to 34.9 with an obesity-related condition such as type 2 diabetes, heart disease, or sleep apnea. Your doctor must refer you to a bariatric surgery center and document that you have tried weight loss through diet and exercise first. Medicare also requires that you complete a psychological evaluation and attend a nutrition counseling session before surgery.

Before scheduling surgery, your surgeon's office must request prior authorization from Medicare. This means Medicare reviews your medical records and approves the surgery in advance. Without prior authorization, Medicare may deny the claim. The approval process typically takes one to two weeks. Once approved, you pay 20 percent coinsurance for the surgery after your Part B deductible.

What Medicare does not cover for weight loss

Medicare does not pay for nutritionist or dietitian visits for weight loss counseling, even if your doctor refers you. It also does not cover weight loss programs (such as Weight Watchers or Jenny Craig), gym memberships, fitness classes, or personal training. Over-the-counter diet supplements, meal replacement shakes, and appetite suppressants are not covered.

Some Medicare Advantage plans (Part C) may offer additional benefits such as gym memberships or nutrition counseling as a supplemental benefit, but this varies by plan and by region. If you have a Medicare Advantage plan, check your plan documents or call the plan directly to ask whether weight loss support is included.

How to find out what your specific plan covers

Your coverage depends on which type of Medicare you have. If you have Original Medicare (Part A and Part B), the rules described above explore. If you have a Medicare Advantage plan, your plan may cover different services or have different rules. Call your plan's customer service number (on the back of your insurance card) and ask specifically: "Does my plan cover semaglutide for weight loss?" and "Does my plan cover bariatric surgery, and what prior approval is needed?"

You can also contact Medicare directly at 1-800-MEDICARE to ask about coverage for a specific drug or procedure. Have your Medicare number ready and be prepared to describe your medical conditions. Medicare can tell you whether a service is covered under Original Medicare, but they cannot tell you what your out-of-pocket cost will be until your doctor submits a claim.

What to do before you talk to your doctor

If you are interested in weight loss treatment, gather your recent medical records, including lab results showing your weight, BMI, and any diagnoses such as diabetes or heart disease. Write down the names of any weight loss drugs or surgeries you are considering. When you see your doctor, ask directly whether the treatment is medically necessary for your specific conditions and whether Medicare is likely to cover it.

If your doctor recommends a covered treatment, ask them to check with Medicare for prior authorization before you schedule anything. This step prevents surprises when the bill arrives. If your doctor recommends a treatment that Medicare does not cover, ask whether there are covered alternatives or whether the cost would be lower if you pay out of pocket.

Frequently Asked Questions

Does Medicare cover Ozempic for weight loss?

Medicare covers Ozempic (semaglutide) only if you have type 2 diabetes or heart disease. If your doctor prescribes it for weight loss without one of these conditions, Medicare will not pay. Your doctor must document the medical reason in your chart.

What is the BMI requirement for bariatric surgery?

Medicare covers bariatric surgery when your BMI is 35 or higher, or 30 to 34.9 if you also have an obesity-related condition such as diabetes, heart disease, or sleep apnea. Your surgeon's office will calculate your BMI and confirm you meet the requirement before requesting prior authorization.

Do I need prior authorization before bariatric surgery?

Yes. Your surgeon's office must request prior authorization from Medicare before scheduling surgery. Without it, Medicare may deny the claim. The process usually takes one to two weeks, so plan ahead.

Will Medicare pay for a nutritionist to help me lose weight?

No. Medicare does not cover nutritionist or dietitian visits for weight loss counseling. Some Medicare Advantage plans may offer this as an extra benefit, so check your plan documents or call your plan's customer service number.

What if my Medicare Advantage plan covers something Original Medicare does not?

Medicare Advantage plans can offer extra benefits beyond what Original Medicare covers. Call your plan's customer service number and ask what weight loss services are included. Coverage varies by plan and location, so you need to check your specific plan.