If you have tried diets, exercise plans and medical advice for years and your weight has still not shifted, it is natural to wonder whether surgery is an option. Obesity is a medical condition influenced by genetics, hormones, metabolism and lifestyle. It is not a question of willpower. Knowing who qualifies for bariatric surgery is a good first step toward an informed conversation.
What Is Bariatric Surgery?
Bariatric surgery, also called weight loss surgery or metabolic surgery, changes the size of the stomach, the route food takes through the digestive system, or both. It is usually performed with keyhole techniques through small incisions.
It helps people eat less and feel full sooner. For many, it also improves weight-related conditions such as type 2 diabetes and high blood pressure. It is not a quick fix, though. Lasting results depend on changes to eating habits, activity and regular follow-up.
BMI Eligibility: What the Guidelines Say
Body mass index (BMI) compares your weight with your height. It is one of the main starting points when a surgeon assesses whether surgery may help.
Under 2022 international guidelines, surgery may be considered for anyone with a BMI of 35 or above, whether or not they have other health problems. For a BMI of 30 to 34.9, it may be considered when weight-related conditions such as type 2 diabetes are present, or when weight has not responded to non-surgical methods.
For Indians and other Asian populations, the thresholds are lower. Health risks such as diabetes and heart disease tend to appear at a lower BMI, so the same guidelines define obesity from a BMI of 25 and say surgery should be offered from a BMI of 27.5. You can find more on this in our overview of morbid obesity.
A BMI figure is only a starting point. It does not decide eligibility by itself.
What Else Does a Surgeon Consider?
Your surgeon will look at the full picture, which usually includes:
- the weight-loss methods you have already tried
- weight-related conditions, such as diabetes, high blood pressure, sleep apnoea, fatty liver or joint pain
- your general health and fitness for anaesthesia
- your understanding of the lifestyle changes needed afterwards
- support from a dietitian and, where helpful, a counsellor
Surgery is not right for everyone. Sometimes the best advice is to begin with medical management and review later.
Common Types of Bariatric Surgery
Two of the most widely discussed procedures are gastric sleeve surgery and gastric bypass surgery.
In a sleeve gastrectomy, a large portion of the stomach is removed, leaving a smaller, tube-shaped stomach. In a gastric bypass, a small stomach pouch is created and connected to a lower part of the small intestine, so food bypasses part of the digestive tract.
Each has its own benefits and trade-offs. The right choice depends on your health, your weight-related conditions and your goals, which is why it is decided together with your surgeon. To read more about our approach, visit our bariatric surgery page, or learn how laparoscopic surgery works.
Is Bariatric Surgery Safe?
Like any operation, bariatric surgery carries risks, including infection, bleeding, leaks along the staple lines and problems related to anaesthesia. After surgery, some people may also develop nutritional deficiencies, so vitamin and mineral supplements and regular blood tests are usually needed for life.
Results differ from person to person, and no surgeon can guarantee a specific amount of weight loss. A thorough assessment beforehand, along with a clear explanation of the risks and benefits, helps you decide with confidence.
How Much Does Bariatric Surgery Cost in India?
There is no single price. The cost depends on the procedure, the hospital, the pre-operative tests, the length of stay and the follow-up care you need. Insurance coverage varies by policy and often depends on whether you meet the insurer’s eligibility criteria. Our team can help you check where you stand.
A consultation is the best way to get a realistic estimate, because the surgeon can first understand your health and recommend a procedure.
Take the Next Step
Weight-related health concerns can feel heavy to carry alone. If you would like to understand whether you may be eligible, or simply want to explore your options, you are welcome to speak with our team. Dr. Preethi Mrinalini has completed a fellowship in Metabolic and Bariatric Surgery. You can read more about her on the doctor details page, or book an appointment at Marina’s Clinic, Nungambakkam, Chennai.
