Ormiston Weight Loss Service

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Ormiston Hospital has a highly skilled professional team who work together to deliver the Ormiston Weight Loss Service (OWLS). Take the first step on your journey to weight loss with OWLS today.

Our dedicated team of weight loss experts regularly help people transform their lives. OWLS patients succeed in their weight loss goals because they have the support they need; over a 12 month period the OWLS team regularly track and monitor patients after surgery. The team includes highly experienced surgeons, and caring support from our nutritionist and physiotherapist.

Ormiston Hospital offers the best and safest procedures available for surgical and nonsurgical weight loss. Contact us to learn more about our options or read on below.

OWLS offers three weight loss procedures:

Bariatric Surgery

Weight Loss Surgery is the only scientifically proven method for long term and effective weight loss. Bariatric surgery is not a quick-fix cure.  Weight loss still depends on healthy eating and exercise, which is why OWLS has set up a support network to help patients on their journey.

OWLS patients not only achieve weight loss, but often see a reduction in many obesity related conditions such as type II diabetes, sleep apnoea, joint pain, lipid abnormalities and high blood pressure – these are either completely resolved or substantially improved.Weight Loss Questionnaire Quiz

Surgery is advised for people who have tried other weight loss methods without long-term success.

Gastric Sleeve

Gastric sleeve surgery is the OWLS most popular surgical weight loss procedure. A gastric sleeve helps to restricts food intake, which leads to weight loss. This is a laparoscopic procedure where a large portion of the stomach is removed and the remaining stomach is small – a narrow tube called a sleeve. Our patients see good weight loss after this procedure.

Gastric Bypass

The gastric bypass procedure involves bypassing most of the stomach and the first part of the small bowel. A new small stomach pouch is made that cannot hold large amounts of food, and by skipping the first part of the small bowel, appetite hormones are also affected.

Gastric bypass surgery is performed to help lose weight and decrease the risk of serious health conditions such as diabetes, high blood pressure, heart disease and stroke. After surgery the stomach is smaller fills easily with less food: this decreases the number of daily calories and boosts weight loss.


Recovery varies between patients.  For Bariatric surgery patients are typically in hospital for up to two nights. Our physiotherapist visits you regularly and helps you with post surgery exercise advice. We like to see our patients take their time to heal and recuperate after any weight loss procedure.

We encourage OWLS patients to stay in hospital to ensure they are comfortably back on their feet again, you may request a longer stay before your procedure at your own cost. We offer modern private en-suite rooms, with wifi, sky TV, and fresh meals prepared onsite. You can speak to your surgeon about how much time you will need.

ready for weight llossReady?

If you are ready to make take the next step in your weight loss journey, please take a look at our surgeon profiles below and decide who you would like to meet with. From there, you can contact the surgeon or email OWLS to make a booking for a consultation for surgery.

OWLS team

Our team of experts are here to support you and guide you on your weight loss journey. You can email owls@ormistonhospital.co.nz to make an enquiry directly with our friendly team.

Andrew MacCormick

Habib Rahman

Ravinder Ogra 

Dinesh Lal

Alice Baynham – Physiotherapist