Last updated: June 2026 Medically reviewed by Dr. Mani Habibi, IFSO Member Key Takeaways Total NHS waiting time from GP referral to bariatric surgery: 22–34 months on average. NHS eligibility: BMI 40+, or BMI 35+ with a significant obesity-related condition (NICE CG189). A mandatory 6–12 month Tier 3 weight management programme is required before you can be placed on the surgical waiting list. Alternatives include UK private clinics (£8,000–£15,000) or Turkey (save 60–70%) with surgery scheduled within 2–4 weeks. In This Guide NHS Pathway Step by Step Eligibility Criteria Faster Alternatives FAQ If you’re considering bariatric surgery through

Last updated: June 2026 Medically reviewed by Dr. Mani Habibi, IFSO Member Key Takeaways Gastric sleeve removes 75–80% of the stomach; gastric bypass creates a small pouch and reroutes the intestine. Both are performed laparoscopically. Bypass typically achieves 60–80% excess weight loss; sleeve achieves 50–70% — both within 12–18 months. Bypass is preferred for BMI 40+, type 2 diabetes, or severe acid reflux; sleeve suits those wanting a simpler, lower-risk procedure. NHS waiting times average 22–34 months; in Turkey, surgery can be scheduled within 2–4 weeks at 60–70% lower cost. In This Guide How Each Works Side-by-Side Comparison