Last updated: March 2026
How Much Does Bariatric Surgery (Weight Loss Surgery) Cost?
Cost Breakdown by Type
| Type / Procedure | Without Insurance | With Insurance |
|---|---|---|
| Gastric Sleeve | $10,000 – $25,000 | $3,000 – $8,000 |
| Gastric Bypass | $15,000 – $35,000 | $3,500 – $10,000 |
| Duodenal Switch | $20,000 – $40,000 | $5,000 – $12,000 |
| SADI-S (Single Anastomosis) | $18,000 – $35,000 | $4,000 – $10,000 |
CPT/ADA Code: 43644
What Affects the Cost
- Brand-name vs. generic availability
- Insurance formulary tier placement
- Pharmacy choice (retail vs. mail-order vs. Costco)
- Manufacturer savings cards and coupons
- Dosage and quantity prescribed
- Geographic location
Insurance Coverage
Typical coverage: Coverage varies — requires BMI criteria, supervised diet history, and prior authorization
Most insurance plans use a tiered formulary: Tier 1 (generic) $0-$15 copay, Tier 2 (preferred brand) $25-$75, Tier 3 (non-preferred brand) $50-$150, Tier 4 (specialty) $100-$500+. Prior authorization may be required for certain medications. Step therapy may require trying cheaper alternatives first.
How to Save Money
- Always ask for generic when available — saves 50-90%
- Use GoodRx, RxSaver, or similar discount cards
- Costco pharmacy is open to non-members and often has lowest prices
- Mark Cuban's Cost Plus Drugs offers transparent low pricing
- Manufacturer patient assistance programs provide free medication to qualifying patients
- HSA/FSA funds can cover medication costs tax-free
Related Procedures & Costs
Frequently Asked Questions
Bariatric surgery costs $15,000 to $35,000 without insurance depending on the procedure type. Self-pay bundled pricing is often available.
Most insurers require BMI 40+ (or 35+ with comorbidities), 3-6 months of supervised diet, psychological evaluation, and nutrition counseling.
Gastric bypass and duodenal switch produce the most weight loss, but gastric sleeve is the most commonly performed due to its favorable risk-benefit profile.