Yes, Medicare covers weight-loss surgery, but only if you meet three conditions, and missing any one flips the answer to no. If a doctor has raised bariatric surgery, here's 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
- Before You Schedule: What to Ask
- What If You Don't Qualify or Get Denied?
- Asking About Wegovy or Zepbound Instead?
- 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. 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 been "previously unsuccessful with medical treatment for obesity," which is how the rule words it. In plain terms, you already tried the non-surgical route and it didn't work.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
All three have to be true together, not just one or two.
If you or your parent has years of diets and doctor visits behind you, that history is what this condition is about. Ask the doctor's office to pull those records early, and ask what they plan to send in. The rule's wording doesn't tell you what paperwork counts, so the surgeon's office and your Medicare contractor are the ones to ask.
Which Weight-Loss Surgery Does Medicare Cover?
Medicare doesn't cover every weight-loss operation, and coverage depends on the exact procedure. Some are covered everywhere, one is left up to your region, and several 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 |
| A bariatric procedure the national rules don't name at all | Up to your local Medicare contractor |
| Open adjustable gastric banding | Not covered |
| Open sleeve gastrectomy | Not covered |
| Vertical banded gastroplasty (open or laparoscopic) | Not covered |
| Intestinal bypass surgery | Not covered |
| Gastric balloon for treatment of obesity | Not covered |
| Treatment for obesity alone (no surgery) | Not covered |
The sleeve gastrectomy. 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 is that it may be covered, and it depends on your area. The three conditions above still have to be met either way; MAC discretion doesn't replace them.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery Your MAC publishes its local coverage policies (called LCDs) in the Medicare Coverage Database, which anyone can search on cms.gov. Ask the surgeon's office which MAC covers your area and what its policy says about the sleeve, then look that policy up yourself.Centers for Medicare & Medicaid Services. (n.d.). CMS — Local Coverage Determinations. cms.gov. Retrieved Aug 7, 2026, from https://www.cms.gov/medicare/coverage/determination-process/local
A procedure that isn't on the list. That's not automatically a no. The national rule leaves coverage of any bariatric procedure it doesn't name, in either direction, to your local MAC, for people who meet those same three conditions. So if your surgeon proposes something that isn't on this table, ask what your MAC does with it, not whether Medicare has already refused.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
Obesity care that is covered. "Treatment for obesity alone is not covered" gets repeated in a way that costs people care they're entitled to. Non-surgical services connected to treating obesity are covered when they're an integral and necessary part of a course of treatment for a medical condition such as cardiac or respiratory disease, diabetes, or hypertension.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery The line isn't surgery versus no surgery. It's whether the obesity treatment stands alone or is part of treating another diagnosed condition.
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 costs vary with your situation, starting with whether you're an inpatient or an outpatient.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 the surgery is done as an outpatient procedure, it runs through Part B. 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 Sep 4, 2026, from https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles Here's how that math works, using a round made-up number just to show the mechanics. It is not a price quote. If the approved amount were $10,000, you'd pay the $283 deductible, then 20% of the remaining $9,717 (about $1,943), for roughly $2,226 total.
If you're admitted to the hospital as an inpatient, the hospital stay runs through Part A, and the deductible to check is the Part A inpatient hospital deductible, $1,736 per benefit period in 2026.Centers for Medicare & Medicaid Services. (2026). 2026 Medicare Parts A & B Premiums and Deductibles. cms.gov. Retrieved Sep 4, 2026, from https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles,Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery Ask the surgeon's office which status you'll have, because what you pay can differ between the two. For a hospital stay, ask the hospital for an estimate, since copayments are possible after Medicare starts to pay.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
Medicare doesn't cover transportation costs to get to a bariatric surgery center, so budget for travel and lodging on your own if the surgeon is far away.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
Your other coverage changes what's left after Medicare pays:
- Medigap. A Medigap supplement works with Original Medicare. A Plan G, for example, pays your remaining Part A and Part B coinsurance in full once you've paid the $283 Part B deductible.Centers for Medicare & Medicaid Services. (n.d.). Compare Medigap Plan Benefits. medicare.gov. Retrieved Oct 3, 2026, from https://www.medicare.gov/health-drug-plans/medigap/basics/compare-plan-benefits Medigap works differently in Massachusetts, Minnesota and Wisconsin, and other lettered plans cover different shares, so read your own policy before you count on it.
- Medicare Advantage. Your plan has to cover everything medically necessary that Original Medicare covers, but it may want prior authorization before the surgery. Original Medicare, in most cases, doesn't.Centers for Medicare & Medicaid Services. (n.d.). Compare Original Medicare & Medicare Advantage - Medicare.gov. medicare.gov. Retrieved Aug 8, 2026, from https://www.medicare.gov/basics/get-started-with-medicare/get-more-coverage/your-coverage-options/compare-original-medicare-medicare-advantage,Centers for Medicare & Medicaid Services. (n.d.). Prior Authorization for Certain Hospital Outpatient Department (OPD) Services. cms.gov. Retrieved Oct 3, 2026, from https://www.cms.gov/data-research/monitoring-programs/medicare-fee-service-compliance-programs/prior-authorization-pre-claim-review-initiatives/prior-authorization-certain-hospital-outpatient-department-opd-services The good news is a cap: every plan has a yearly in-network out-of-pocket maximum, and for 2026 federal rules keep it at $9,250 or below.Centers for Medicare & Medicaid Services. (n.d.). Compare Original Medicare & Medicare Advantage - Medicare.gov. medicare.gov. Retrieved Aug 8, 2026, from https://www.medicare.gov/basics/get-started-with-medicare/get-more-coverage/your-coverage-options/compare-original-medicare-medicare-advantage
- Medigap and Advantage don't mix. Medigap can't be used to pay a Medicare Advantage plan's copayments, coinsurance, deductibles or premiums.Centers for Medicare & Medicaid Services. (n.d.). 12026 understanding medicare advantage plans. medicare.gov. Retrieved Sep 24, 2026, from https://www.medicare.gov/publications/12026-understanding-medicare-advantage-plans.pdf
Before You Schedule: What to Ask
A few calls up front beat a surprise bill later.
- Ask the surgeon's office what BMI and health-condition records they'll submit, what records show the earlier non-surgical treatment, and whether you'll be an inpatient or outpatient.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
- Ask for coverage confirmation in writing, especially for a sleeve or any procedure not on the table above.
- On Medicare Advantage, call the number on your plan card and ask whether the plan requires prior authorization before the surgery, and who submits the request.Centers for Medicare & Medicaid Services. (n.d.). Compare Original Medicare & Medicare Advantage - Medicare.gov. medicare.gov. Retrieved Aug 8, 2026, from https://www.medicare.gov/basics/get-started-with-medicare/get-more-coverage/your-coverage-options/compare-original-medicare-medicare-advantage,Centers for Medicare & Medicaid Services. (n.d.). Contact Medicare — Medicare.gov. medicare.gov. Retrieved Jul 23, 2026, from https://www.medicare.gov/talk-to-someone
- On Original Medicare, call 1-800-MEDICARE (1-800-633-4227, TTY 1-877-486-2048, open 24 hours a day, 7 days a week, except some federal holidays) with coverage questions, or read the Medicare.gov bariatric surgery page.Centers for Medicare & Medicaid Services. (n.d.). Contact Medicare — Medicare.gov. medicare.gov. Retrieved Jul 23, 2026, from https://www.medicare.gov/talk-to-someone
- For free one-on-one counseling, your State Health Insurance Assistance Program (SHIP) can walk through your coverage. Find yours at shiphelp.org or at 1-877-839-2675. Your state's SHIP may go by another name, such as HICAP or SHINE.Centers for Medicare & Medicaid Services. (2026). Medicare & You 2026 (CMS publication 10050, medicare.gov). medicare.gov. Retrieved Jul 15, 2026, from https://www.medicare.gov/publications/10050-medicare-and-you.pdf,Centers for Medicare & Medicaid Services. (2026). Medicare Appeals (CMS Product No. 11525, April 2026) — Medicare.gov. medicare.gov. Retrieved Sep 27, 2026, from https://www.medicare.gov/publications/11525-medicare-appeals.pdf
What If You Don't Qualify or Get Denied?
Start with which condition is the problem. If your BMI is under 35, or you have no obesity-related condition, the national rule says no, and an appeal can't change the rule itself.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery That's hard to hear after years of trying, so it helps to know what is still open. An appeal can still ask whether the rule was applied correctly to your facts, such as a record the reviewer missed.Centers for Medicare & Medicaid Services. (n.d.). CMS — Local Coverage Determinations. cms.gov. Retrieved Aug 7, 2026, from https://www.cms.gov/medicare/coverage/determination-process/local
If it's the treatment-history condition you're short on, ask your doctor's office what earlier treatment is on your chart. Your own records of past programs, visits and medications are worth gathering too.
If a claim is denied, the denial shows up on your Medicare Summary Notice. Keep that notice, because the clock starts when you get it. With Original Medicare, you have 120 days to ask the MAC for a redetermination, and the MAC generally decides within 60 days. With a Medicare Advantage plan, you have 65 days from the plan's denial notice to ask for a reconsideration.Centers for Medicare & Medicaid Services. (n.d.). Appeals in Original Medicare. medicare.gov. Retrieved Jul 15, 2026, from https://www.medicare.gov/providers-services/claims-appeals-complaints/appeals/original-medicare Our Medicare appeals guide walks through each level. A SHIP can help with appeals for free, and you can reach one through shiphelp.org or 1-800-MEDICARE.Centers for Medicare & Medicaid Services. (2026). Medicare Appeals (CMS Product No. 11525, April 2026) — Medicare.gov. medicare.gov. Retrieved Sep 27, 2026, from https://www.medicare.gov/publications/11525-medicare-appeals.pdf
Asking About Wegovy or Zepbound Instead?
Weight-loss drugs are a separate question from surgery, and a yes on one doesn't tell you anything about the other. If you're asking about Wegovy, Zepbound, or Ozempic, that runs on different rules, and we cover it in our guide to Medicare and weight-loss drugs.
Frequently Asked Questions
Does Medicare cover gastric bypass surgery?
Yes. Roux-en-Y gastric bypass is covered nationally, as long as you clear all three conditions: a BMI of 35 or higher, at least one obesity-related condition, and earlier medical treatment for obesity that didn't work.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
What BMI do I need for Medicare to cover weight-loss surgery?
You need a BMI of 35 or higher, but that's only one of three boxes. You also need an obesity-related condition (type 2 diabetes counts) and a history of medical treatment that didn't work. Miss one and the answer is no.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
Does Medicare cover a gastric sleeve?
Maybe. A laparoscopic sleeve gastrectomy isn't guaranteed nationwide, because your local Medicare Administrative Contractor decides. The open version isn't covered anywhere. Ask the surgeon's office what your contractor's policy says.Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
How much will bariatric surgery cost me on Medicare?
There's no set price. 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 to the stay. Travel to the surgery center isn't covered.Centers for Medicare & Medicaid Services. (2026). 2026 Medicare Parts A & B Premiums and Deductibles. cms.gov. Retrieved Sep 4, 2026, from https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles,Centers for Medicare & Medicaid Services. (n.d.). Bariatric surgery. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/bariatric-surgery
What can I do if Medicare says no?
Check which of the three conditions fell short, then ask your doctor's office what can be added to your records. If a claim was denied, you can appeal, and a SHIP counselor can help for free.Centers for Medicare & Medicaid Services. (n.d.). Appeals in Original Medicare. medicare.gov. Retrieved Jul 15, 2026, from https://www.medicare.gov/providers-services/claims-appeals-complaints/appeals/original-medicare,Centers for Medicare & Medicaid Services. (2026). Medicare Appeals (CMS Product No. 11525, April 2026) — Medicare.gov. medicare.gov. Retrieved Sep 27, 2026, from https://www.medicare.gov/publications/11525-medicare-appeals.pdf
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