Criteria for weight loss surgery

Am I eligible for weight loss surgery?

“Are you wondering if bariatric surgery could be right for you? It’s a big step, and the first question to ask is: ‘Am I eligible?’This page will help you figure that out with a simple BMI calculator and a short health assessment form. Let’s get started!”

Bill Gong

Bariatric Surgeon Perth

Calculate your BMI

BMI Calculator here

Height cm

and weight kg

What your BMI result means:

BMI of 30–34.9: You may qualify if you have weight-related health conditions.
BMI of 35 or higher: Bariatric surgery is typically recommended.

Not sure what this means? Fill out our short form below, and we’ll help assess your situation.

Bariatric surgery eligibility

Who is bariatric surgery suitable for?

Bariatric surgery, such as gastric sleeve surgery, is recommended for people who struggle with obesity and its related health conditions.

Here’s what happens:

It’s not just about weight loss—it’s about improving your health, energy, and quality of life.

You may be a suitable candidate for bariatric surgery if:

Your Body Mass Index (BMI) is 35 or higher.
Your BMI is 30 or above and you have weight-related health conditions such as:
- Type 2 diabetes
- Sleep apnoea (trouble breathing during sleep)
- Fatty liver disease
- Polycystic Ovary Syndrome (PCOS) or infertility

If you’re unsure where you stand, use the BMI calculator on this page to get started, or fill out our short eligibility form for a personalised assessment.

What if I have a lot of muscle and a high BMI?

BMI doesn’t differentiate between muscle and fat, so athletes or individuals with high muscle mass might show a high BMI despite being healthy. If this is the case, other factors like your health conditions and medical history will be assessed to determine if bariatric surgery is suitable for you.

Does BMI work the same for people of other ethnicities?

No, BMI like all measurements are not perfect tools and the thresholds can be different for different people; i.e. patients of Asian descent. Research shows that individuals of Subcontinental and Asian backgrounds may develop weight-related health conditions, like Type 2 diabetes or heart disease, at a much lower BMI. For this reason, you might be eligible for bariatric surgery with a BMI of 27–30, especially if you have health issues linked to weight.

Can I qualify for surgery if my BMI is below 35?

Yes, you may still qualify for bariatric surgery if your BMI is between 30 and 35 and you have weight-related health conditions. Conditions like Type 2 diabetes, sleep apnoea, fatty liver disease or metabolic syndrome like PCOS. If you’re unsure, filling out our form or booking a consultation will give us the full picture.

“Your dietitian is your secret weapon in this journey. Staying in touch, especially during the first 12 months, ensures you’re meeting your nutritional needs and staying on track for long-term success.”

Bill Gong

Gastric Sleeve Surgeon Perth

If you’re struggling with weight and the health challenges that come with it, bariatric surgery might be a life-changing option. Let’s find out if it’s the right step for you.

Weight loss surgery Perth

Take the next step towards a healthier you

Fill out this short questionnaire to see if you’re eligible, and Dr Bill Gong will personally review your details and get back to you.

Form will be replaced here