Find the Types of Bariatric Weight Loss Surgery for You
Choosing to have bariatric surgery is rarely a single decision. It is a series of smaller ones, and the first is understanding the options.
There is not a single operation but several, and learning the types of bariatric weight-loss surgery is the clearest way to begin. The right one depends more on your health and circumstances than on the procedure itself.
This guide sets out the main types, explains how the choice is made, and describes the sleeve gastrectomy pathway at BIMC CosMedic in Bali, so you arrive at a consultation already clear on the terms.
What Bariatric Surgery Is
Bariatric surgery, also called metabolic or weight-loss surgery, changes the digestive system to support significant and sustained weight loss. Depending on the procedure, this may involve reducing the size of the stomach and, in some operations, changing how food moves through the small intestine. Bariatric surgery is the most effective intervention for severe obesity and may be considered when other approaches have not achieved lasting results.
It can also improve obesity-related health conditions, including type 2 diabetes, hypertension and sleep apnoea.
At BIMC CosMedic, bariatric surgery is delivered through a multidisciplinary pathway in an ACHSI-accredited hospital setting. Seven specialist consultations and full screening, including endoscopic assessment, precede surgery, helping the team determine whether bariatric surgery is appropriate and prepare you for the procedure and recovery.
How Bariatric Surgery Works
The different operations reach the same goal by two broad means. Some restrict how much the stomach can hold. Others also change how the digestive tract absorbs food. Both reduce hunger and increase fullness after a small meal. This is why the type matters, since each leans on those mechanisms to a different degree.
How the Right Type Is Chosen for You
Surgery is generally considered for a BMI of 35 or above, or 30 or above where significant obesity-related conditions are present. The right procedure then depends on your BMI, your health conditions, your dietary habits and your pre-operative assessments. The decision is made with the medical team across a full work-up, never on a single consultation.
The Main Types of Bariatric Surgery
Four operations account for most of what patients will hear about, set out here without ranking them one above the other.
Sleeve Gastrectomy
Removes about 80 per cent of the stomach, leaving a narrow sleeve that limits capacity and reduces the hormones that drive hunger. It is technically simpler and a shorter operation than the others. This is the procedure performed at BIMC CosMedic, worth keeping in mind as the remaining types are described.
Gastric Bypass (Roux-en-Y)
Creates a small stomach pouch and reroutes the small intestine, reducing both how much you eat and how much you absorb. It has a strong effect on type 2 diabetes and carries a greater need for ongoing nutritional monitoring.
Adjustable Gastric Band
Places an adjustable silicone band around the upper abdomen. It is the least invasive option, but weight loss is slower and less pronounced, and its use has declined over the past decade.
Duodenal Switch (BPD/DS and SADI-S)
Combines a sleeve with an intestinal bypass. Both variants are among the most effective for weight loss and diabetes, and both carry the highest need for lifelong supplementation.
What BIMC CosMedic Performs, and the Team Behind It
BIMC CosMedic performs sleeve gastrectomy as part of the Bariatric Plan: seven specialist consultations (digestive surgeon, anaesthesiologist, clinical nutritionist, psychiatrist, internist, physiatrist, and radiologist), endoscopic screening, and a personalised meal plan before surgery, all within ACHSI-accredited theatres.
The work-up is deliberately thorough, and includes a psychiatric assessment as part of readiness rather than as a barrier. The surgery is performed by digestive surgeons dr. I Wayan Agus Murcahya and dr. Ahmad Nur Aulia.
What to Expect, and How Much You Can Lose
Sleeve gastrectomy typically takes around four hours, followed by three nights in hospital and a minimum of fourteen nights of monitored recovery on the island.
Most patients lose 60 to 80 per cent of their excess body weight within the first twelve to eighteen months, fastest in the first three to six. Lifelong supplementation is part of the picture too, including iron, vitamin B12, calcium, vitamin D, and a multivitamin, with long-term follow-up. Surgery is a tool rather than a shortcut, and lasting results depend on the dietary and lifestyle changes that support it.
The care around the operation matters as much as the operation itself. Before surgery, the team readies you medically, nutritionally and emotionally. That same care continues in the quiet, private surroundings of Nusa Dua and, once you are home, through structured telehealth follow-up over the months. The lasting result is rarely a dramatic before-and-after. It simply looks like someone living well.
If You Would Like to Talk It Through
If you are considering bariatric surgery, the clearest next step is to have a conversation. Our concierge can help you understand the sleeve gastrectomy pathway, what the assessment involves, and what to plan for during a stay in Bali, while the medical team will assess whether the procedure is appropriate for you. We will reply within 24 hours via the contact page or WhatsApp.