Most major insurance types in Washington state cover bariatric surgery, including Medicaid (Apple Health), Medicare, state employee plans, and many private marketplace plans. The key variable isn’t whether you have coverage but whether you can meet the medical criteria and complete the required pre-surgery steps, which typically take six months or longer.
Washington Medicaid (Apple Health)
Washington’s Medicaid program, called Apple Health, covers medically necessary bariatric surgery for eligible adults. State administrative code (WAC 182-531-1600) explicitly authorizes this coverage. Managed care organizations that administer Apple Health, such as Molina Healthcare, require a structured approval process split into stages.
The pre-surgical requirements through Molina’s Medicaid plan illustrate what most Apple Health recipients can expect. You’ll need to complete 12 visits with a registered dietitian over at least six months, attending twice per month without excessive cancellations or no-shows. You’re also required to keep a food journal throughout that period. On the mental health side, you must complete and pass a psychosocial assessment with a qualified provider: a psychiatrist, psychiatric nurse practitioner, licensed clinical social worker, or psychologist. Only after clearing both nutritional and psychological evaluations can you move forward to surgical scheduling.
State Employee Plans (PEBB and SEBB)
Washington’s Public Employees Benefits Board (PEBB) and School Employees Benefits Board (SEBB) plans cover bariatric surgery. Under the 2025 Kaiser Permanente Northwest SEBB plan, for example, both inpatient and outpatient bariatric procedures are covered for “clinically severe obesity in adults,” along with related pre-surgery and post-surgery services.
The cost share is 20% coinsurance after your deductible for both inpatient hospital stays and outpatient surgery visits. Prior authorization is required, meaning your insurer must approve the procedure before it’s scheduled. Beyond that standard review, you must also meet one of two additional requirements: either fully comply with Kaiser Permanente’s Severe Obesity Evaluation and Management Program, or have the surgery performed at a facility accredited by the Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP). Most major bariatric centers in Washington hold this accreditation.
Medicare Coverage
Medicare covers bariatric surgery for Washington residents. The regional Medicare contractor for Washington is Noridian Healthcare Solutions, which also covers Alaska, Idaho, and Oregon. Medicare nationally covers gastric bypass, sleeve gastrectomy, and biliopancreatic diversion with duodenal switch for beneficiaries with a BMI of 35 or higher who have at least one obesity-related condition. Laparoscopic sleeve gastrectomy has been covered since 2016, when previous regional restrictions were retired.
Medicare requires the surgery to be performed at a certified facility, and you’ll still need to meet standard pre-surgical criteria including documentation from your physician showing prior weight loss attempts have been unsuccessful.
Private and Marketplace Plans
Washington does not have a state law that mandates all private health plans cover bariatric surgery. This means coverage varies significantly from one plan to another. Some marketplace plans sold through Washington Healthplanfinder include bariatric surgery as a covered benefit; others exclude it entirely. You need to check your specific plan’s evidence of coverage document or call member services before assuming you’re covered.
If your marketplace plan does cover bariatric surgery, your out-of-pocket costs depend on your plan’s metal tier. Bronze plans cover about 60% of costs (you pay 40%), Silver plans cover 70%, Gold plans cover 80%. For 2026, the federal out-of-pocket maximum is $10,600 for individual coverage and $21,200 for family coverage. Once you hit that ceiling, your plan pays 100% of allowed charges for covered benefits. Premiums and services your plan doesn’t cover don’t count toward that limit.
Employer-sponsored plans through large companies often cover bariatric surgery, but again, this depends on the employer and the specific plan. Large self-insured employers (common in Washington’s tech sector) set their own coverage rules, so two people working at the same company could have different benefits depending on which plan option they chose.
Which Procedures Are Typically Covered
The three procedures most commonly covered by Washington insurers are sleeve gastrectomy, Roux-en-Y gastric bypass, and biliopancreatic diversion with duodenal switch (sometimes called SADI-S). Sleeve gastrectomy is the most frequently performed and is covered by virtually every plan that includes bariatric benefits. Kaiser Permanente Washington reserves SADI-S for patients with a BMI over 50.
Newer and less-established procedures face more scrutiny. Endoscopic sleeve gastroplasty, intragastric balloon devices, and transoral outlet reduction are reviewed on a case-by-case basis by most insurers and often require six months of recent clinical documentation. Lap-Band (adjustable gastric banding) has fallen out of favor due to high complication and revision rates, and some plans no longer cover it.
The Approval Process Takes Months
Regardless of your insurer, expect the path from first consultation to surgery date to take six to twelve months. The timeline is driven by two things: the mandatory pre-surgical program and the prior authorization review.
Most Washington insurers require a supervised weight management period of at least six months. During this time, you’ll attend regular dietitian appointments, document your eating habits, and demonstrate that you can follow dietary guidelines. You’ll also need a psychological evaluation to screen for untreated mental health conditions that could affect surgical outcomes, such as binge eating disorder or unmanaged depression. These aren’t meant as gatekeeping for its own sake. Patients who complete structured pre-surgical programs have better long-term outcomes.
Once you’ve completed these requirements, your surgeon’s office submits a prior authorization request with all supporting documentation. The insurer then reviews whether you meet their clinical criteria, which generally includes a BMI of 40 or higher, or a BMI of 35 or higher with at least one related condition like type 2 diabetes, sleep apnea, or heart disease. Denials can be appealed, and Washington’s Office of the Insurance Commissioner can help if you believe your plan wrongly denied a covered benefit.
How to Verify Your Coverage
The fastest way to confirm your benefits is to call the member services number on your insurance card and ask specifically whether bariatric surgery is a covered benefit under your plan. Request the clinical criteria in writing so you know exactly what’s required. Ask about which facilities and surgeons are in-network, since going out of network can multiply your costs several times over.
If you’re shopping for a new plan during open enrollment and bariatric surgery is a priority, compare the Summary of Benefits and Coverage documents for each plan you’re considering. Look for “bariatric surgery” or “weight loss surgery” in the covered services section. Plans that exclude it will typically list it under exclusions. Choosing a Gold-tier plan will cost more in monthly premiums but cuts your coinsurance share to 20%, which matters for a surgery that commonly runs $15,000 to $25,000 before insurance adjustments.