The short answer
Yes — Medicare covers certain bariatric (weight-loss) surgeries when you meet defined medical requirements. This is different from Medicare's coverage of weight-loss drugs, which is much more limited. Surgery is covered because it's an established medical treatment for severe obesity with related conditions.
The requirements are specific, so this isn't a benefit you can simply request. Your doctor has to document that you meet the criteria, and you'll typically go through an evaluation process first.
What you have to meet
Generally, Medicare covers bariatric surgery for people who have a body mass index (BMI) of 35 or higher, at least one serious obesity-related health condition (such as type 2 diabetes, heart disease, or severe sleep apnea), and documentation that previous medical attempts to manage weight haven't worked. Your surgical team documents all of this as part of the approval.
There's usually a workup involved — evaluations to confirm you're an appropriate candidate. It's not a quick process, but the requirements exist because surgery is a serious step with real risks and benefits. This is distinct from Medicare's approach to weight-loss medications, which our guide to whether Medicare covers drugs like Ozempic explains.
Which procedures are covered, and what you'll pay
Medicare covers several established bariatric procedures — such as gastric bypass and sleeve gastrectomy — when performed at approved facilities and when you meet the criteria. Procedures that aren't well established or are considered experimental generally aren't covered.
Cost-wise, bariatric surgery is usually an inpatient or outpatient surgical service, so your Part A and Part B cost-sharing applies. A Medicare Supplement or Medicare Advantage plan changes what you actually pay out of pocket. Because a major surgery involves several bills — facility, surgeon, anesthesia — it's worth understanding your coverage before you schedule. Our Medicare basics overview is a good place to start.
Frequently Asked Questions
Does Medicare cover weight-loss surgery?
Yes, Medicare covers established bariatric surgeries like gastric bypass and sleeve gastrectomy when you meet the medical criteria and use an approved facility.
What are the requirements for Medicare to cover bariatric surgery?
Generally a BMI of 35 or higher, at least one serious obesity-related condition such as type 2 diabetes or heart disease, and documentation that prior medical weight-management attempts were unsuccessful.
Does Medicare cover the cost fully?
No. Bariatric surgery is a covered surgical service subject to your Part A and Part B cost-sharing. A Medigap or Medicare Advantage plan affects what you pay out of pocket.
Is bariatric surgery coverage the same as weight-loss drug coverage?
No. Surgery is covered when you meet the criteria, while Medicare's coverage of weight-loss medications is much more limited. They're handled very differently.
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