What is Bariatric Surgery?
Bariatric surgery refers to a group of surgical procedures that modify the digestive system to promote weight loss in patients who are severely overweight or obese (typically BMI ≥ 37.5, or ≥ 32.5 with obesity-related medical conditions). The most common procedures in Singapore are laparoscopic sleeve gastrectomy (removal of approximately 80% of the stomach) and Roux-en-Y gastric bypass (bypassing the stomach and upper small intestine).
Beyond weight loss, metabolic surgery has been shown to achieve remission of Type 2 diabetes in 50–80% of patients, and significant improvement in hypertension, sleep apnoea, and joint pain. The MOH Singapore has recognised bariatric surgery as a medically indicated treatment for qualifying patients.
Bariatric Surgery Costs in Singapore (2026)
| Procedure | Private Hospital (Est.) | Medisave |
|---|
| Laparoscopic Sleeve Gastrectomy | S$18,000–S$35,000 | ✅ (up to S$15,000 from ISP) |
| Laparoscopic Gastric Bypass (RYGB) | S$22,000–S$45,000 | ✅ |
| Revisional Bariatric Surgery | S$25,000–S$55,000 | ✅ |
Medisave note: Bariatric surgery is Medisave-claimable in Singapore for qualifying patients (BMI ≥ 37.5, or ≥ 32.5 with obesity-related complications). Your ISP may cover a significant portion of the costs. Pre-authorisation is required — your surgeon's clinic can assist with this.
FAQ — Bariatric Surgery Singapore
Am I eligible for bariatric surgery in Singapore?+
General eligibility criteria in Singapore: BMI ≥ 37.5 kg/m², or BMI ≥ 32.5 kg/m² with at least one serious obesity-related condition (Type 2 diabetes, hypertension, sleep apnoea, heart disease). You should have attempted non-surgical weight loss without sustained success. Psychological evaluation and a multidisciplinary assessment are also required.
What is the difference between sleeve gastrectomy and gastric bypass?+
Sleeve gastrectomy removes approximately 80% of the stomach, creating a narrow sleeve that limits food intake. Gastric bypass (RYGB) additionally reroutes the digestive tract, bypassing most of the stomach and upper small intestine. Bypass generally results in greater and more durable weight loss and is more effective for Type 2 diabetes, but carries slightly higher surgical risk. Your surgeon will recommend the most appropriate procedure.
Will I need to take vitamins after bariatric surgery?+
Yes. Nutritional supplementation is lifelong after bariatric surgery, particularly after gastric bypass. Common supplements include multivitamins, calcium citrate, vitamin D, B12, and iron. Regular blood tests are needed to monitor nutritional status. Compliance with supplementation is critical for long-term health.
How much weight will I lose with bariatric surgery?+
On average, sleeve gastrectomy results in loss of 60–70% of excess body weight within 12–18 months. Gastric bypass typically achieves 70–80% excess weight loss. Long-term results depend heavily on lifestyle adherence, dietary choices, and follow-up care.
