Does Medicare Pay for Weight Loss Surgery?

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CMS.gov NCD 100.1 · Medicare.gov · Aetna · Humana · GoodRx · National Library of Medicine

Yes — Medicare covers bariatric surgery when you meet three specific criteria. This guide covers every covered procedure, the three eligibility requirements, what you’ll pay, and how to get approved.

🏅 10 Key Things to Know About Medicare Bariatric Surgery Coverage

Medicare does cover weight loss surgery — but not for everyone, and not for every procedure. The coverage rules come from CMS’s National Coverage Determination (NCD) 100.1, which was established in February 2006 and most recently updated in March 2025. To qualify, you must meet three specific medical criteria: a BMI of 35 or higher, at least one serious obesity-related health condition (called a “co-morbidity”), and documented proof that previous medical attempts to lose weight have not worked. The surgery must also be performed at a Medicare-approved facility and must be one of the procedures CMS has determined to be medically beneficial. Total bariatric surgery costs range from $7,423 to $33,541 (National Library of Medicine) — but with Medicare covering 80% after your deductibles, your out-of-pocket share is a fraction of that. This guide covers everything you need to know before your first appointment.

1
Does Medicare pay for weight loss surgery? Yes — for specific procedures when three criteria are met
Yes. Medicare covers specific bariatric surgery procedures under the National Coverage Determination (NCD) 100.1, established by CMS and most recently updated March 2025. Coverage requires all three of these conditions: (1) BMI of 35 or higher; (2) at least one serious health condition related to obesity (such as Type 2 diabetes, high blood pressure, or sleep apnea); and (3) documented previous unsuccessful attempts at medical weight loss treatment. The surgery must be performed at a Medicare-certified facility. Medicare Part A covers inpatient hospital costs; Part B covers outpatient surgery and related services. Medicare pays 80% of approved costs after your deductible is met — you pay the remaining 20% plus deductibles. Source: CMS.gov NCD 100.1; Medicare.gov; Aetna Medicare; Humana Jan 2026.
2
What weight loss surgeries does Medicare cover? Four nationally covered; sleeve gastrectomy approved locally (MAC)
CMS NCD 100.1 specifically lists four nationally covered bariatric procedures: (1) Open and laparoscopic Roux-en-Y gastric bypass (RYGB) — the most common; (2) Open and laparoscopic Biliopancreatic Diversion with Duodenal Switch (BPD/DS); (3) Laparoscopic Adjustable Gastric Banding (LAGB, also called LAP-BAND) — nationally covered but now rarely performed; (4) Sleeve gastrectomy (gastric sleeve) — not nationally covered by NCD but increasingly approved by local Medicare Administrative Contractors (MACs) on a case-by-case basis. A 2020 study found laparoscopic sleeve gastrectomy is now the fastest-growing Medicare bariatric procedure. NOT covered nationally: gastric balloon, intestinal bypass, mini gastric bypass, and most SADI/SADI-S procedures. Source: CMS.gov NCD 100.1 updated March 2025; GoodRx Jan 2026; BariatricSurgeryCorner 2026.
3
What are the three Medicare requirements for weight loss surgery? BMI ≥ 35 + one co-morbidity + failed prior medical treatment — all three required
All three of these criteria must be satisfied simultaneously: (1) BMI of 35 or higher — your body mass index must be at or above 35, which is the threshold for Class II obesity (morbid obesity). A BMI of 30–34.9 typically does not qualify under national NCD standards. (2) At least one serious co-morbidity related to obesity — you must have a concurrent health condition that is worsened by obesity. Common qualifying co-morbidities include Type 2 diabetes, high blood pressure (hypertension), obstructive sleep apnea, heart disease, osteoarthritis, chronic kidney disease, and fatty liver disease. (3) Previously unsuccessful with medical treatment for obesity — you must have documented medical records showing serious attempts to lose weight through non-surgical methods (diet programs, supervised weight loss, prescription medications, exercise programs) that did not achieve lasting results. Source: CMS.gov NCD 100.1; Aetna Medicare; GoHealth Aug 2025; MedicareFAQ.
4
How much does Medicare pay for weight loss surgery? Medicare pays 80% after deductibles — patient pays 20% plus Part A/B deductibles
Medicare’s standard cost-sharing applies to covered bariatric surgery: Medicare pays 80% of the Medicare-approved amount; the patient pays 20% coinsurance plus applicable deductibles. Total bariatric surgery costs range from $7,423 to $33,541 depending on the procedure, according to the National Library of Medicine. UCSF estimates a typical all-in cost of $20,000–$25,000 including pre-op tests, anesthesia, surgeon fees, hospital facility, and post-op care. Your share on a $20,000 procedure: approximately $4,000 (20%) plus any unsatisfied deductible. In 2026: Part B deductible is $257 (annual); Part A inpatient deductible is $1,676 per benefit period. Medigap (Medicare Supplement) plans can cover most or all of your 20% coinsurance. Medicare Advantage plans must cover the same procedures and have annual out-of-pocket maximums. Source: NLM; eHealth; RetireGuide; GoodRx Jan 2026; Medicare.gov 2026 costs.
5
Does Medicare cover gastric sleeve surgery? Not nationally by NCD — but increasingly approved locally by MACs; rapidly growing
The gastric sleeve (laparoscopic sleeve gastrectomy, or LSG) is not specifically listed as nationally covered in CMS NCD 100.1. However, the NCD allows local Medicare Administrative Contractors (MACs) to determine coverage for procedures not specifically named in the NCD, for patients who meet the standard BMI ≥ 35 + co-morbidity + failed medical treatment criteria. A 2020 study on Medicare bariatric procedures confirmed that laparoscopic sleeve gastrectomy is “on the rise” as the fastest-growing Medicare bariatric surgery. Many local MACs now routinely approve it. If your surgeon recommends the sleeve gastrectomy, ask their billing office specifically whether your local MAC covers it — and confirm before scheduling. Your bariatric surgeon’s practice should be familiar with local MAC coverage policies. Source: CMS.gov NCD 100.1; GoodRx Jan 2026; GoHealth Aug 2025; BariatricSurgeryCorner 2026.
6
Does Medicare cover gastric bypass surgery? Yes — nationally covered under NCD 100.1 when eligibility criteria are met
Roux-en-Y gastric bypass (RYGB) is specifically listed in CMS NCD 100.1 as a nationally covered bariatric procedure — both the open and laparoscopic versions. It was the most common Medicare bariatric procedure historically, though laparoscopic sleeve gastrectomy has been rising. Coverage requires the standard three criteria: BMI ≥ 35, at least one obesity-related co-morbidity, and documented failed prior medical treatment. The surgery must be performed at a Medicare-enrolled facility. Pre-operative requirements typically include 4 months of weight loss visits, a psychiatric evaluation, and a dietary consultation. Medicare pays 80% of approved costs after your Part B deductible ($257 in 2026). Your surgeon’s practice will submit the claim for approval after gathering the required medical documentation. Source: CMS.gov NCD 100.1; Humana Jan 2026; MedicareFAQ; BariatricSurgeryCorner 2026.
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What surgeries does Medicare NOT cover for weight loss? Gastric balloon, mini gastric bypass, intestinal bypass, SADI-S (not nationally approved)
Several weight loss procedures are explicitly excluded from Medicare national coverage: (1) Gastric balloon — not covered by Medicare. (2) Intestinal bypass — nationally non-covered. (3) Mini gastric bypass (one-anastomosis gastric bypass) — not nationally covered. (4) SADI/SADI-S (Single Anastomosis Duodeno-Ileal Bypass) — coverage varies by region and payer; not nationally confirmed under Medicare FFS. (5) Open sleeve gastrectomy — historically excluded (open approach specifically not nationally covered). (6) Any cosmetic procedure — Medicare does not cover weight loss surgery performed for cosmetic purposes only. Note: Medicare also does NOT cover any procedures performed outside the United States. Source: CMS.gov NCD 100.1; BariatricSurgeryCorner 2026; eHealth; MedicareFAQ.
8
Does Medicare cover skin removal after weight loss surgery? Yes — if your doctor certifies it is medically necessary, not cosmetic
Medicare does not cover cosmetic surgery. However, skin removal surgery (panniculectomy or body contouring) after significant weight loss may be covered by Medicare if your primary care physician or surgeon certifies that it is medically necessary — meaning the excess skin is causing medical problems such as chronic skin infections, rashes, mobility limitations, or hygiene difficulties — not purely to improve appearance. The medical necessity certification is required and must be supported by documentation. Body contouring solely for appearance is not covered. If you are considering skin removal after bariatric surgery, discuss with your surgeon whether your specific situation meets Medicare’s medical necessity standard. Source: MedicareFAQ (direct Q&A response); eHealth; Humana Jan 2026.
9
How long does it take Medicare to approve weight loss surgery? Up to 4 months — no pre-authorization, but extensive documentation required
An important distinction: Medicare FFS (Original Medicare) does NOT provide pre-authorization for bariatric surgery. Instead, the claim is submitted after documentation is gathered, and Medicare determines coverage at the claim-review stage. However, pre-operative preparation typically takes up to 4 months and is where most of the waiting occurs. Requirements typically include: 4 months of supervised weight-loss visits with documentation; a psychiatric evaluation; a dietary consultation; medical records showing prior failed weight loss attempts; and physician certification of medical necessity. CMS policy states: “We will not impose a specific period, but expect all surgeons to be part of a comprehensive program for the treatment of co-morbid conditions related to obesity.” Coordinate all documentation with your bariatric surgeon’s practice before any claim is submitted. Source: BariatricSurgeryCorner 2026; GoHealth Aug 2025; CMS policy statement; RetireGuide.
10
Does Medicare cover weight loss programs without surgery? Yes — three non-surgical programs are covered under Part B right now
Medicare covers three non-surgical weight management services that are available independently of bariatric surgery: (1) Intensive Behavioral Therapy (IBT) for Obesity under Part B — covered for beneficiaries with a BMI of 30 or higher, when provided by a primary care practitioner in a primary care setting. The Part B deductible and coinsurance are waived for this service — it is effectively free if you qualify. (2) Medical Nutrition Therapy (MNT) under Part B — covered if you have diabetes or kidney disease and are referred by your doctor. (3) Bariatric surgery (as detailed in this guide) — the surgical option when non-surgical approaches have been exhausted. Beginning July 2026, the Medicare GLP-1 Bridge program will also offer eligible beneficiaries access to certain GLP-1 weight-loss drugs at $50/month — the first time Medicare has covered medications specifically for weight management. Source: Wellcare Apr 2026; CMS.gov; Medicare.gov; CMS.gov GLP-1 Bridge.

Sources: CMS.gov NCD 100.1 cms.gov/medicare-coverage-database/view/ncd.aspx?NCDId=57 (updated Mar 2025; effective Feb 21 2006; covered: open+laparoscopic RYGBP; BPD/DS; LAGB; BMI≥35; one co-morbidity; failed prior treatment; MAC local coverage for unlisted procedures; nationally non-covered unlisted); Medicare.gov medicare.gov/coverage/bariatric-surgery (eligible if meet conditions related to morbid obesity; does not cover transportation; Part A inpatient Part B outpatient); Aetna Medicare aetna.com/medicare (all 3 criteria; medically necessary; Medicare-approved facility; Part A/B coverage; Medicare Advantage); Humana humana.com Jan 29 2026 (NCD criteria; RYGB LAGB sleeve gastrectomy; Part A inpatient Part B outpatient; Medigap); GoodRx goodrx.com Jan 29 2026 (LSG on rise 2020 study; costs $7,423–$33,541; BMI≥35 criteria; MAC local review; RYGB LAGB BPD/DS sleeve); BariatricSurgeryCorner bariatricsurgerycorner.com 2026 (4 months pre-op visits; psych eval; dietary consult; no pre-auth Medicare FFS; no coverage outside US; gastric balloon not covered; SADI coverage varies; revision surgery case-by-case; skin removal medically necessary); GoHealth gohealth.com Aug 2025 (LSG MAC approved locally; sleeve gastrectomy; CMS comprehensive program policy statement; $7,400–$33,000 range); MedicareFAQ medicarefaq.com (sleeve covered MAC; gastric bypass; duodenal switch; lap-band; avg 65% excess weight loss sleeve; skin removal medically necessary); RetireGuide retireguide.com (NLM avg ~$14,000 2016 dollars; 80/20 Medicare; up to 4 months approval; Medicare-enrolled surgeon); eHealth ehealthinsurance.com ($20,000–$25,000 UCSF estimate; Medigap; Medicare Advantage OOP max; no cosmetic coverage); Healthline healthline.com Feb 13 2025 (Part A/B/D coverage; BMI≥35; Medigap; Part B $257 deductible; $185 premium; 20% coinsurance); Wellcare wellcare.com Apr 2026 (bariatric surgery covered certain conditions; IBT Part B BMI≥30 waived coinsurance; GLP-1 Bridge July 2026 $50/mo); CBO.gov cbo.gov Oct 2024 (Medicare covers bariatric + behavioral + screening; legally prohibited weight loss drugs standard Part D)

📊 Which Weight Loss Surgeries Does Medicare Cover?

Procedure	Medicare Coverage	Notes
Gastric Bypass (RYGB)	✅ Nationally Covered	Open and laparoscopic. Most common. NCD 100.1 listed. Requires BMI≥35, co-morbidity, failed treatment.
Gastric Sleeve (Sleeve Gastrectomy)	⚠️ MAC Local Coverage	Not in national NCD — but increasingly approved by local MACs. Fastest-growing Medicare bariatric procedure (2020 study). Ask your surgeon’s billing office about local MAC status.
Duodenal Switch (BPD/DS)	✅ Nationally Covered	Open and laparoscopic. Most invasive. Less commonly performed. NCD 100.1 listed. Requires all 3 criteria.
LAP-BAND (Gastric Banding)	✅ Nationally Covered	NCD 100.1 listed. Now declining in use — rarely recommended or performed. Requires all 3 criteria.
Gastric Balloon	❌ NOT Covered	Not covered nationally or locally by Medicare. Not a surgical procedure.
Mini Gastric Bypass	❌ NOT Covered	Not nationally covered. One-anastomosis bypass not in NCD. Check with local MAC for any regional coverage.
SADI / SADI-S	⚠️ Varies by Region	Not nationally confirmed under Medicare FFS. Some payers/regions may cover. Verify with local MAC before scheduling.
Intestinal Bypass	❌ NOT Covered	Nationally non-covered under NCD 100.1.
Revision Surgery	⚠️ Case-by-Case	May be covered to correct previous bariatric surgery or replace implants. Requires medical necessity documentation.
Skin Removal After Weight Loss	⚠️ If Medically Necessary	Covered if physician certifies medical necessity (skin infections, mobility issues). NOT covered for cosmetic purposes only.
Surgery Outside the U.S.	❌ NEVER Covered	Medicare does not cover any procedures performed outside the United States regardless of other eligibility.

Sources: CMS.gov NCD 100.1 Mar 2025 (nationally covered: RYGBP BPD/DS LAGB; nationally non-covered: intestinal bypass + unlisted); GoodRx Jan 2026 (LSG MAC rising; 2020 study); BariatricSurgeryCorner 2026 (gastric balloon not covered; SADI varies; revision case-by-case; no coverage outside US); MedicareFAQ (skin removal medically necessary)

💰 What You’ll Pay — Medicare Cost Breakdown

🏥 Total Surgery Cost Range

$7,423 – $33,541

National Library of Medicine data. UCSF estimates typical all-in cost of $20,000–$25,000 including pre-op tests, anesthesia, surgical fees, hospital stay, and post-op care. Your Medicare share: approximately 20% of approved amount after deductibles. Source: NLM; UCSF / eHealth.

💊 Medicare’s Share

80% of approved costs

Medicare pays 80% of the Medicare-approved amount for covered services once you meet your deductible. On a $20,000 procedure: you pay approximately $4,000 (20%) plus applicable deductibles. Medigap plans can cover most or all of your 20%. Source: Medicare.gov; RetireGuide; Humana Jan 2026.

📋 Part B Deductible

$257 per year

Part B annual deductible for 2026 is $257. After meeting this once, you pay 20% coinsurance on all Part B services for the rest of the year. Outpatient bariatric surgery typically billed through Part B. Part A inpatient deductible: $1,676 per benefit period (for hospital stays). Source: Healthline Feb 2025; Medicare.gov.

📅 Approval Timeline

Up to 4 months

Pre-operative documentation typically requires 4 months of supervised weight-loss visits, plus psychiatric and dietary evaluations. Medicare does not issue pre-authorization — approval is determined at the claim review stage. CMS: “no specific period imposed, but expects comprehensive program participation.” Source: BariatricSurgeryCorner; RetireGuide; CMS policy.

⚖️ Minimum BMI to Qualify

BMI ≥ 35

The national NCD requires BMI of 35 or higher (Class II obesity). A BMI of 30–34.9 does not typically qualify under national standards. A BMI of 35 equates to approximately 5’5″ / 210 lbs or 5’9″ / 237 lbs. Use Medicare’s BMI calculator at your primary care visit. Source: CMS.gov NCD 100.1; Aetna Medicare.

📞 Medicare Helpline

1-800-633-4227

Call Medicare 24/7 to verify bariatric surgery coverage, find Medicare-approved facilities near you, and ask about your specific plan’s requirements. TTY: 1-877-486-2048. State Health Insurance Assistance Programs (SHIP): 1-877-839-2675. Source: Healthline; Medicare.gov.

Sources: NLM (costs $7,423–$33,541); UCSF/eHealth ($20,000–$25,000 typical); Medicare.gov / RetireGuide (80/20 split); Healthline Feb 2025 (Part B deductible $257; Part A $1,676); BariatricSurgeryCorner 2026 / CMS policy (4 months no pre-auth); CMS.gov NCD 100.1 (BMI≥35); Medicare.gov 1-800-633-4227 (24/7 helpline)

🔬 Covered Surgery Types — What Each Procedure Does

Gastric Bypass (Roux-en-Y) — Nationally Covered by Medicare

✅ NATIONALLY COVERED · NCD 100.1 · MOST COMMON

The Roux-en-Y gastric bypass (RYGB) creates a small stomach pouch and reroutes the digestive tract through a Y-shaped segment of the small intestine. This both restricts food intake and reduces calorie absorption. It can be performed as a laparoscopic (keyhole) procedure or open surgery — both are nationally covered. It has been the most-studied and historically most common Medicare bariatric procedure. Both the open and laparoscopic approaches are specifically listed in CMS NCD 100.1. Pre-operative requirements include psych evaluation, dietary consultation, and documented weight loss history over approximately 4 months.

✅ Nationally covered (NCD 100.1) 🔬 Restricts stomach AND reduces absorption 🏥 Open and laparoscopic both covered 📋 BMI≥35 + co-morbidity + failed medical treatment 💰 Medicare pays 80% of approved costs

Gastric Sleeve (Sleeve Gastrectomy) — MAC Local Coverage; Fastest Growing

⚠️ MAC LOCAL COVERAGE · FASTEST-GROWING MEDICARE PROCEDURE

The laparoscopic sleeve gastrectomy (LSG) removes approximately 80–85% of the stomach, leaving a narrow tube shape. The stomach restricts food intake without rerouting the intestine. It is not specifically listed in CMS NCD 100.1 for national coverage, but local Medicare Administrative Contractors increasingly approve it on a case-by-case basis for patients who meet all three eligibility criteria. A 2020 Medicare study confirmed LSG is the fastest-growing bariatric procedure in the Medicare population. Average excess weight loss: approximately 65% (MedicareFAQ). Before scheduling, confirm with your surgeon’s billing office that your local MAC covers it.

⚠️ Not in NCD — but MAC-approved in most areas 📈 Fastest-growing Medicare bariatric procedure (2020 study) ⚖️ Removes ~80–85% of stomach; no intestinal rerouting 📋 All 3 eligibility criteria still required 📞 Verify: ask your surgeon’s billing office about local MAC

Duodenal Switch (BPD/DS) — Nationally Covered, Most Aggressive

✅ NATIONALLY COVERED · NCD 100.1 · MOST INVASIVE

The Biliopancreatic Diversion with Duodenal Switch (BPD/DS) removes a large portion of the stomach and bypasses a significant part of the small intestine — providing both restriction and major malabsorption. It achieves the greatest average weight loss of covered procedures but also carries the highest surgical risk and longest recovery. It is specifically listed in CMS NCD 100.1. Both open and laparoscopic approaches are covered. Fewer surgeons specialize in this procedure — finding one in your area may require more research.

✅ Nationally covered (NCD 100.1) 🔬 Greatest weight loss; highest risk and recovery 🏥 Open and laparoscopic both covered ⚠️ Fewer surgeons perform this procedure 📋 BMI≥35 + co-morbidity + failed prior treatment required

LAP-BAND (Gastric Banding) — Nationally Covered but Declining

✅ NATIONALLY COVERED · NCD 100.1 · NOW RARELY PERFORMED

Laparoscopic Adjustable Gastric Banding (LAGB, or LAP-BAND) places an inflatable silicone band around the upper stomach to create a small pouch, restricting food intake. The band can be adjusted by inflating or deflating it with saline. It is specifically listed as nationally covered in CMS NCD 100.1. However, it is now rarely recommended or performed because long-term results are less durable than bypass or sleeve procedures, and band slippage and removal are common issues. If a surgeon strongly recommends the LAP-BAND today, it is worth asking why other procedures are not more appropriate for your specific situation.

✅ Nationally covered (NCD 100.1) 📉 Declining — rarely recommended in current practice 🔬 Adjustable band; least invasive; least durable ⚠️ High long-term complication/revision rate 📋 All 3 eligibility criteria still required

Pre-Operative Requirements — What Medicare Expects Before Surgery

DOCUMENTATION REQUIRED · UP TO 4 MONTHS · NO PRE-AUTH

Medicare does not issue pre-authorization for bariatric surgery under Original Medicare (Fee for Service). Instead, your surgeon submits a claim after gathering required documentation, and Medicare reviews and approves or denies it at the claim stage. The standard pre-operative documentation package typically expected includes: supervised weight-loss visits over approximately 4 months with consistent documentation; a psychiatric or psychological evaluation confirming you understand the procedure and can comply with post-operative requirements; a dietary consultation establishing nutritional education; and medical records demonstrating previous serious but unsuccessful weight loss attempts. CMS policy: “We will not impose a specific period, but expect all surgeons to be part of a comprehensive program for the treatment of co-morbid conditions related to obesity.”

📅 ~4 months of supervised weight-loss visits + documentation 🧠 Psychiatric/psychological evaluation required 🥗 Dietary consultation required 📋 Medical records of failed prior weight loss attempts ⚠️ No Medicare pre-authorization — claim reviewed after surgery

How to Reduce Your Out-of-Pocket Costs — Medigap, MA, and Counseling

MEDIGAP · MEDICARE ADVANTAGE · FREE BEHAVIORAL THERAPY

Three strategies to reduce what you pay for bariatric surgery on Medicare: (1) Medigap (Medicare Supplement) plans — can cover most or all of your 20% coinsurance and Part A/B deductibles, dramatically reducing out-of-pocket costs for major procedures. On a $20,000 surgery: Medigap could save you $4,000+. Cannot be used with Medicare Advantage. (2) Medicare Advantage plans — must cover the same procedures as Original Medicare but include an annual out-of-pocket maximum, capping your total annual medical spending. (3) Free obesity counseling under Part B — Intensive Behavioral Therapy (IBT) for Obesity is available for free (no deductible, no coinsurance) if your BMI is 30 or higher and your primary care provider offers it. This satisfies some of the “documented medical weight loss attempts” requirement and costs you nothing.

💰 Medigap: may cover your 20% coinsurance + deductibles 🛡️ Medicare Advantage: annual OOP maximum caps your costs 🆓 IBT for Obesity (Part B): FREE if BMI≥30 — no copay 📞 SHIP counselors: free help comparing plans · 1-877-839-2675 🌐 medicare.gov/plan-compare (compare Medigap and MA plans)

🚫 What Medicare Does NOT Cover for Weight Loss

NOT COVERED · KNOW BEFORE YOU SCHEDULE

To avoid unexpected bills, know these exclusions before scheduling: Medicare does NOT cover: gastric balloon procedures; mini gastric bypass (one-anastomosis); intestinal bypass; SADI/SADI-S in most regions (check locally); cosmetic procedures for appearance only; transportation to a bariatric facility; any procedure performed outside the United States. Additionally, Medicare does NOT currently cover weight-loss medications (GLP-1 drugs) for obesity under standard Part D — that begins changing July 2026 with the $50/month bridge program. Always confirm your specific procedure is covered by your local MAC before scheduling to avoid a denied claim after surgery.

❌ Gastric balloon — not covered ❌ Mini gastric bypass — not nationally covered ❌ Intestinal bypass — nationally excluded (NCD 100.1) ❌ Transportation to surgery facility ❌ Surgery outside the United States ❌ Cosmetic procedures (appearance only)

Sources: CMS.gov NCD 100.1 (nationally covered: RYGBP BPD/DS LAGB; non-covered: intestinal bypass; MAC for unlisted procedures); GoodRx Jan 2026 (LSG fastest-growing 2020 study; costs $7,423–$33,541); GoHealth Aug 2025 (comprehensive program CMS statement; sleeve gastrectomy MAC local); BariatricSurgeryCorner 2026 (no pre-auth; 4 months visits; psych eval; dietary; no coverage outside US; gastric balloon not covered; SADI varies; revision case-by-case); MedicareFAQ (avg 65% excess weight loss sleeve; skin removal medically necessary; no coverage Mexico); Humana Jan 2026 (NCD criteria; Part A/B coverage; IBT free); Wellcare Apr 2026 (IBT Part B BMI≥30 waived deductible/coinsurance; GLP-1 Bridge July 2026 $50/mo); eHealth (no cosmetic; MA OOP max; Medigap); SHIP 1-877-839-2675

❓ Medicare Weight Loss Surgery Questions — Answered Plainly

💡 Does Medicare Pay for Weight Loss Surgery — Complete Answer

Yes, Medicare pays for specific weight loss surgeries when three criteria are all met. The coverage comes from CMS National Coverage Determination (NCD) 100.1, which was established in 2006 and updated in March 2025. The three required criteria are: (1) BMI of 35 or higher; (2) at least one serious health condition related to obesity, such as Type 2 diabetes, high blood pressure, sleep apnea, or heart disease; and (3) documented previous unsuccessful attempts at medical weight loss treatment. All three must be present — meeting only one or two is not sufficient for national coverage. The surgery must also be performed at a Medicare-certified facility and must be one of the nationally covered procedures: gastric bypass (RYGB), biliopancreatic diversion with duodenal switch (BPD/DS), or laparoscopic adjustable gastric banding (LAP-BAND). Gastric sleeve surgery is increasingly approved locally by Medicare Administrative Contractors even though it is not in the national NCD. Medicare pays 80% of approved costs after your deductibles are met. On a typical $20,000–$25,000 procedure, your share is approximately $4,000–$5,000 in coinsurance plus deductibles — significantly less with a Medigap plan. Source: CMS.gov NCD 100.1; Medicare.gov; Aetna Medicare; GoodRx Jan 2026.

💡 Does Medicare Cover Gastric Sleeve Surgery — The Complicated Truth

The gastric sleeve (laparoscopic sleeve gastrectomy) is not specifically listed in CMS NCD 100.1 as a nationally covered procedure — but in practice, it is increasingly covered throughout the United States through local Medicare Administrative Contractor (MAC) approvals. A 2020 study on Medicare bariatric surgery trends confirmed that laparoscopic sleeve gastrectomy is now the fastest-growing bariatric procedure in the Medicare population, meaning MACs across the country are approving it at a high and increasing rate. NCD 100.1 allows MACs to make coverage determinations for procedures not explicitly listed in the NCD for patients who meet the standard criteria: BMI ≥ 35, at least one obesity-related co-morbidity, and documented prior failed medical treatment. The practical answer: your gastric sleeve is likely to be covered if you meet the eligibility criteria and your surgeon operates in an area where your local MAC has approved it. The way to find out definitively: ask your bariatric surgeon’s billing and insurance coordinator to confirm MAC coverage in your specific geographic jurisdiction before scheduling. Never assume coverage — confirm it before the procedure to avoid an unexpected denied claim. Source: CMS.gov NCD 100.1; GoodRx Jan 2026 (2020 study citation); GoHealth Aug 2025; BariatricSurgeryCorner 2026.

💡 How Much Does Medicare Pay for Bariatric Surgery — Cost Breakdown

Total bariatric surgery costs range from $7,423 to $33,541 depending on the procedure and location, per the National Library of Medicine. UCSF estimates a typical all-in cost of $20,000–$25,000 including pre-operative tests, anesthesia, surgical fees, hospital facility, and post-operative care. Medicare pays 80% of Medicare-approved costs after you meet your deductible. Your out-of-pocket costs depend on whether the surgery is inpatient or outpatient: for inpatient (Part A), you pay the $1,676 per-benefit-period hospital deductible plus 20% coinsurance for days 61–90 of a hospital stay; for outpatient (Part B), you pay the $257 annual deductible plus 20% coinsurance on the approved amount. On a $20,000 surgery: approximately $4,000 (20%) plus your applicable deductible — roughly $4,257–$5,676 depending on setting. Strategies to reduce this further: a Medigap plan can cover most or all of your 20% coinsurance and deductibles; Medicare Advantage plans include annual out-of-pocket maximums; the free Intensive Behavioral Therapy program under Part B (BMI ≥ 30, no copay) can help document your required medical weight loss history at no cost. Medicare does not cover transportation to the surgery facility. Source: NLM; UCSF/eHealth; Healthline Feb 2025; Medicare.gov 2026 costs; Humana Jan 2026.

Sources: CMS.gov NCD 100.1 updated Mar 2025 (three eligibility criteria; nationally covered procedures; MAC local determinations); Medicare.gov medicare.gov/coverage/bariatric-surgery (no transportation; inpatient/outpatient costs); GoodRx Jan 2026 (LSG fastest-growing; costs $7,423–$33,541; BMI≥35); GoHealth Aug 2025 (CMS program statement; LSG MAC local; $7,400–$33,000); BariatricSurgeryCorner 2026 (no pre-auth; MAC verification; documentation); Healthline healthline.com Feb 2025 (Parts A+B coverage; deductibles; Medigap; MA); eHealth (UCSF $20,000–$25,000; no cosmetic; MA); NLM (cost range); SHIP 1-877-839-2675; Medicare 1-800-633-4227; Wellcare Apr 2026 (IBT Part B free BMI≥30)

✅ Five Steps to Get Medicare Coverage for Weight Loss Surgery

Step 1 — Confirm your BMI and diagnoses with your primary care doctor. Ask your doctor to document your current BMI (you need 35 or higher), list all obesity-related health conditions (diabetes, hypertension, sleep apnea, heart disease, etc.), and begin documenting your medical history of weight loss attempts. This documentation becomes the foundation of your entire Medicare coverage case. If your BMI is between 30 and 35, you may not qualify nationally — but discuss with your doctor whether your specific conditions warrant a local MAC exception review.
Step 2 — Begin the 4-month supervised weight loss program. Work with your primary care provider or a medically supervised weight loss program to document consistent weight loss efforts over approximately 4 months. These visits must be in the medical record. This documentation serves two purposes: it satisfies the “previously unsuccessful with medical treatment” Medicare criterion, and it also fulfills the pre-operative documentation requirement your surgeon’s practice will need before submitting your claim. The Intensive Behavioral Therapy (IBT) program under Medicare Part B is free (no deductible, no coinsurance) for beneficiaries with BMI ≥ 30 — use it to count toward this requirement at no cost.
Step 3 — Choose a Medicare-approved bariatric surgeon and facility. Ask any bariatric surgeon’s office: “Are you enrolled with Medicare, and is this facility a Medicare-approved facility for bariatric surgery?” Use Medicare’s provider search tool at medicare.gov to verify. For the gastric sleeve specifically, also ask: “Does our local Medicare Administrative Contractor (MAC) cover laparoscopic sleeve gastrectomy?” Get this confirmed in writing if possible. Medicare does not cover surgery performed at non-enrolled facilities — this is a hard exclusion that cannot be waived.
Step 4 — Complete all pre-operative evaluations. Standard requirements include a psychiatric or psychological evaluation, a dietary consultation, and any medical evaluations your surgeon’s team requests. These should all be completed before submitting any claim. Your bariatric team’s coordinator will typically guide you through this process and know what documentation your local MAC requires. The surgeon’s practice submits the documentation and claim — Medicare determines coverage at the claim review stage (no pre-authorization).
Step 5 — Review your Medigap or Medicare Advantage options before surgery. If you have Original Medicare without a Medigap supplement, your 20% coinsurance on a major surgery can amount to $4,000–$6,000 or more. Enrolling in a Medigap plan (if you are not on Medicare Advantage) can dramatically reduce this. Call SHIP at 1-877-839-2675 for free, unbiased help comparing Medigap and Medicare Advantage plans in your area. If you have a Medicare Advantage plan, review your plan’s specific cost-sharing for inpatient and outpatient surgery before your procedure — Advantage plans have their own cost structures and may require in-network providers.

📞 Key Contacts & Resources: 📞 Medicare: 1-800-633-4227 (24/7) 📞 Medicare TTY: 1-877-486-2048 📞 SHIP (free plan counseling): 1-877-839-2675 🌐 medicare.gov/coverage/bariatric-surgery 🌐 medicare.gov/plan-compare (find your plan) 🌐 CMS NCD 100.1: cms.gov/medicare-coverage-database/view/ncd.aspx?NCDId=57 🔍 Find Medicare providers: medicare.gov/care-compare 💊 Part B IBT: free obesity counseling if BMI≥30

This guide is independently researched and written for informational purposes only. We are not affiliated with, compensated by, or endorsed by CMS, Medicare, or any plan, surgeon, or facility mentioned. Medicare coverage is determined on a case-by-case basis and coverage rules can change. Always verify coverage with Medicare at 1-800-633-4227 and with your specific plan before scheduling any surgical procedure. This content does not constitute medical, legal, or financial advice. All medical decisions must be made with and by your licensed healthcare provider.

Primary sources: CMS.gov NCD 100.1 cms.gov/medicare-coverage-database/view/ncd.aspx?NCDId=57 (updated March 2025; effective February 21 2006; nationally covered: open+laparoscopic RYGBP; open+laparoscopic BPD/DS; LAGB; eligibility: BMI≥35 + one co-morbidity + failed prior medical treatment; MAC local coverage for unlisted procedures; nationally non-covered: all other procedures including intestinal bypass); Medicare.gov medicare.gov/coverage/bariatric-surgery (eligible if meet conditions related to morbid obesity; does not cover transportation; inpatient Part A outpatient Part B; ask provider for cost estimate); Aetna Medicare aetna.com/medicare (all 3 criteria required; medically necessary; Medicare-approved facility; gastric bypass/lap band/sleeve accepted; Part A/B coverage; Advantage OOP max); Humana humana.com/medicare Jan 29 2026 (NCD criteria; RYGB/LAGB/sleeve; Part A inpatient Part B outpatient; Medigap cannot use with Advantage; CMS NCD referenced); GoodRx goodrx.com Jan 29 2026 (LSG on rise 2020 Medicare study; costs $7,423–$33,541 NLM; BMI≥35 criteria; MAC local review; RYGB LAGB BPD/DS sleeve; medically reviewed Katherine C Gilyard / Tamara E Holmes); BariatricSurgeryCorner bariatricsurgerycorner.com 2026 (no pre-authorization Medicare FFS; 4 months visits; psych eval; dietary consult; claim submitted then reviewed; CMS comprehensive program policy statement verbatim; no coverage outside US; gastric balloon not covered; SADI coverage varies; revision surgery case-by-case; skin removal medically necessary MedicareFAQ); GoHealth gohealth.com Aug 2025 (LSG MAC approved locally; CMS policy statement; costs $7,400–$33,000; sleeve gastrectomy MAC case-by-case; no set approval period); MedicareFAQ medicarefaq.com (sleeve covered MAC; gastric bypass; duodenal switch; lap-band declining; avg 65% excess weight loss sleeve; revision surgery; skin removal medically necessary confirmed; no coverage Mexico/outside US); RetireGuide retireguide.com (NLM 2017 study avg ~$14K 2016 dollars; 80/20 Medicare; up to 4 months; Medicare-enrolled surgeon; claim submitted and processed); eHealth ehealthinsurance.com (UCSF $20,000–$25,000 including all costs; Medigap; Medicare Advantage OOP max; no cosmetic coverage; skin removal thousands extra); Healthline healthline.com Feb 13 2025 (Parts A+B covered; Part D post-surgical medications; Medigap; Medicare Advantage; BMI≥35; Part B $257 deductible; $185 monthly premium; 20% coinsurance; CMS NCD referenced); Wellcare wellcare.com Apr 2026 (bariatric surgery covered when medical criteria met; IBT Part B BMI≥30 waived coinsurance + deductible; GLP-1 Bridge July 2026 $50/mo CMS Dec 23 2025 announcement); CBO.gov cbo.gov Oct 2024 (Medicare covers bariatric + behavioral + screening; legally prohibited weight loss drugs standard Part D; Part D prohibition; evidence from bariatric surgery used in AOM modeling)

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