Yes, Medicare covers certain bariatric (weight-loss) surgeries, but only for people who meet three specific conditions, and falling short on any one of them flips the answer to no. If a doctor has raised weight-loss surgery, here's exactly what has to be true before Medicare will pay.
In This Guide
- Key Takeaways
- Does Medicare Cover Weight-Loss Surgery?
- Which Weight-Loss Surgery Does Medicare Cover?
- What You'll Actually Pay
- Weight-Loss Surgery vs. Weight-Loss Drugs
- Frequently Asked Questions
- Learn More
Does Medicare Cover Weight-Loss Surgery?
So here's the deal. Medicare does cover weight-loss surgery, but it treats it as a medical procedure with a gate in front of it, not as something you can elect just because you'd like to drop weight. The rule that governs it is a National Coverage Determination (NCD) numbered 100.1, and it sets three conditions you have to clear.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
You qualify when all three of these are true:
- Your body mass index (BMI) is 35 or higher. BMI is a weight-to-height figure your doctor calculates.
- You have at least one obesity-related health condition. The Centers for Medicare & Medicaid Services (CMS), the federal agency that runs Medicare, counts type 2 diabetes as one of these.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
- You've already tried medical treatment for obesity, and it didn't work. Medicare wants that history documented, not just described in the exam room.
All three have to be true together, not just one or two. That last condition surprises people the most: Medicare generally expects to see that you gave the non-surgical route a real, recorded try first.
Which Weight-Loss Surgery Does Medicare Cover?
Medicare doesn't cover every weight-loss operation, and the specifics matter, because the coverage depends on the exact procedure. Some are covered everywhere, one is left up to your region, and a couple are off the list nationally.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
| Procedure | National Medicare coverage |
|---|---|
| Roux-en-Y gastric bypass (open or laparoscopic) | Covered |
| Biliopancreatic diversion with duodenal switch | Covered |
| Laparoscopic adjustable gastric banding (the "lap band") | Covered |
| Laparoscopic sleeve gastrectomy | Up to your local Medicare contractor |
| Open sleeve gastrectomy | Not covered nationally |
| Treatment for obesity alone (no surgery) | Not covered nationally |
The one to watch is the sleeve gastrectomy, which is one of the most common weight-loss operations today. A stand-alone laparoscopic sleeve isn't guaranteed across the whole country. Whether it's covered is left to your local Medicare Administrative Contractor (MAC), the regional company that processes Medicare claims where you live. So the honest answer on the sleeve is that it may be covered, and it depends on your area.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
Medicare's national policy also spells out what it doesn't cover: treatment for obesity by itself, and the open (non-laparoscopic) version of the sleeve gastrectomy.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery If a procedure isn't on the covered list, the smart move is to have your surgeon's office confirm coverage with Medicare in writing before anything is scheduled.
What You'll Actually Pay
Medicare doesn't publish a set price for bariatric surgery, and no one can hand you an exact number up front, because what you pay depends on where the surgery happens and the details of your case.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery Still, the general shape of the bill is predictable.
When bariatric surgery is done as an outpatient procedure, it runs through Part B. In that case you pay the annual Part B deductible, which is $283 in 2026, and then 20% of the Medicare-approved amount.Centers for Medicare & Medicaid Services. (2026). 2026 Medicare Parts A & B Premiums and Deductibles. cms.gov. Retrieved Jul 23, 2026, from https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles
If your surgeon admits you to the hospital as an inpatient instead, the bill runs through Part A, and you'd owe the Part A inpatient hospital deductible, $1,736 per benefit period in 2026, rather than the Part B math.Centers for Medicare & Medicaid Services. (2026). 2026 Medicare Parts A & B Premiums and Deductibles. cms.gov. Retrieved Jul 23, 2026, from https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles
Because Original Medicare leaves you responsible for that 20%, what you ultimately pay can look very different depending on whether you also carry a Medigap supplement policy or are enrolled in a Medicare Advantage plan.Centers for Medicare & Medicaid Services. (2026). 2026 Medicare Parts A & B Premiums and Deductibles. cms.gov. Retrieved Jul 23, 2026, from https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles Check your own plan's rules for surgery and any prior-authorization step before you commit.
Weight-Loss Surgery vs. Weight-Loss Drugs
Worth pulling these two apart, because they get mixed together constantly. Weight-loss surgery and weight-loss drugs are separate questions, and a yes on one doesn't tell you anything about the other.
This guide covers the surgery. If what you're really asking about is a medication, like Wegovy, Zepbound, or Ozempic, that runs on a different set of rules, and we walk through it in a dedicated guide to weight-loss drugs. Sort out which question you're actually asking first, then check the right rules for it.
Frequently Asked Questions
Does Medicare cover gastric bypass surgery?
Yes. Roux-en-Y gastric bypass is one of the procedures Medicare covers nationally, as long as you meet the three conditions: a BMI of 35 or higher, at least one obesity-related condition, and a documented history of medical weight-loss treatment that didn't work.
What BMI do I need for Medicare to cover weight-loss surgery?
A body mass index of 35 or higher is the threshold, but it isn't the only requirement. You also need at least one obesity-related health condition (type 2 diabetes counts) and a documented record of unsuccessful medical treatment for obesity. All three, not just the BMI.
Does Medicare cover a gastric sleeve?
It depends on where you live. A laparoscopic sleeve gastrectomy isn't guaranteed nationwide; coverage is left to your local Medicare Administrative Contractor, so it can vary by region. The open version of the sleeve isn't covered nationally.
How much will bariatric surgery cost me on Medicare?
There's no set price. If it's done as an outpatient under Part B, you pay the Part B deductible ($283 in 2026) and then 20% of the approved amount. If you're admitted as an inpatient, the Part A hospital deductible ($1,736 per benefit period in 2026) applies instead.Centers for Medicare & Medicaid Services. (2026). 2026 Medicare Parts A & B Premiums and Deductibles. cms.gov. Retrieved Jul 23, 2026, from https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles
Learn More
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The information on Brevy.com is for educational purposes only and is not a substitute for professional legal, financial, or medical advice. Rules vary by state and program and change frequently. Always verify with the relevant agency or a qualified professional. Brevy is not a law firm, financial advisor, or healthcare provider.