About Us

Welcome to Darwin Obesity Surgery Centre

Dr John Treacy M.B.,B.S., M.D., F.R.A.C.S.

graduated from Adelaide University 1984, completed surgical training with the Royal Australasian College of Surgeons in 1993 and was awarded a Doctorate in Medicine with Adelaide University in 1994, researching stomach physiology and emptying.

He undertook three years post-fellowship training in upper gastro-intestinal surgery at the Royal Adelaide Hospital (1994) and the Royal Hallamshire Hospital in Sheffield, U.K (1995 to 1996).

During his time in Britain he was involved in surgery and evaluation of gastric bands for the National Health Service of the United Kingdom, which subsequently led to the introduction of gastric banding there.

He moved to Darwin in 1997 and has been undertaking weight loss surgery at the Darwin Private Hospital since.


Mr Phil Toonson MBBS FRACS

Is a General Surgeon with interests in weight loss surgery, as well as surgery of the liver, bile ducts and pancreas.

He graduated with Honours from the University of Tasmania in 2005 and completed his surgical training with the Royal Australasian College of Surgeons  at both Hobart and Melbourne in 2013. He then undertook 2 years of post-fellowship training in Liver, Biliary and Pancreatic Surgery at Singapore and Adelaide.

He commenced surgical practice in Darwin in 2016. He is a member of the Royal Australasian College of Surgeons Academy of Surgical Educators.

Dr Doug Hardcastle

Dr Doug Hardcastle BA Med, FRACGP, Dip Sports Medicine, DRANZCOG is a General Practitioner with an interest in Sports Medicine, exercise and management of obesity, including gastric banding. He runs a gastric band adjustment clinic at the Darwin Private Hospital.

Dr Peter Newbury

Dr Newbery is a Bariatric Physician and Surgical Assistant to Dr Treacy.

Dr Elio Gagliardo

Dr Elio Gagliardo FRACP is a General Physician with a special interest in the Metabolic Syndrome and Diabetes, as well as interests in Cardiology, Arrhythmology and Rheumatology.

He works as a senior consultant in General Medicine at Royal Darwin Hospital, where he is also responsible for the acute medical clinic. He also provides comprehensive care through the NT Medical Specialist consulting suites, and inpatient consultations at Darwin Private Hospital.

Dr Gagliardo completed his medical degree in 1982 at the Sapienza university of Rome Italy and his specialist training in Internal Medicine and Cardiology in 1987 at the Sapienza University of Rome. Since 2008 he has had the Fellowship of Royal Australian physician college (FRACP).

Dr Chris Purser

Dr Chris Purser MBBS FANZCA is a Specialist Anaesthetist with an interest in anaesthesia for persons with obesity. He qualified in Anaesthetics 1986 and has been practicing with Darwin Obesity Surgery at the Darwin Private Hospital since 1996.


Alyce Rees

Alyce Rees is an Accredited Practising Dietitian who practises at the Balance diet Centre, Casuarina Village in Darwin. Alyce studied at Deakin University, completing a Bachelor of Health Science (Nutrition) and a Masters of Dietetics. She worked as a Community Dietitian in Victoria until late 2012 when she moved to Darwin.

As a Community Dietitian, Alyce saw clients with an array of conditions including diabetes, weight management and cardiovascular disease and also worked closely with local Indigenous populations.

She has facilitated many group sessions for people with prediabetes, cooking demonstrations and provided nutrition advice to a local boot camp. Enquiries enquiries@balancepodiatry.com.au Website www.balancediet.com.au


Paul Twomey

Paul is an Accredited Practicing Dietitian who practices at the Balance Diet Centre, in Palmerston. He possesses qualifications from Deakin University, including a Master in Dietetics and a Bachelor in Food and Nutrition (majoring in exercise science) as well as previously completing Certificate III and IV in Fitness. Paul in a Darwin local returning to the Northern Territory after studying in Melbourne.

Paul pursued a career in dietetics due to the enjoyment he receives from promoting and assisting others to live a healthy, productive and fulfilling life through sensible nutritional advice, skills, development and empowerment. His passion lies in the nutritional management of chronic diseases such as diabetes and cardiovascular disease, sports nutrition, men’s health and weight loss.  Enquiries enquiries@balancepodiatry.com.au Website www.balancediet.com.au




Caring Matters

Nicole Boyd
Nurse Educator

Registered Nurse (Nurse Educator) Nicole Boyd RN/RM Bachelor of Nursing is a Registered Nurse (and Midwife) who has been working in the Territory for more than 15 years. She has extensive experience in medical and surgical nursing, and health education.
Nicole is available for an appointment to discuss any questions you may with preparations for surgery, your stay in hospital and aftercare. Meeting with Nicole helps to familiarize you with all aspects of weight loss surgery. Nicole will visit you in hospital after surgery to ensure all is going smoothly.


Cheryl Blakey. BPsych (Hons)

Northern Territory University. Associate Member of the Australian Psychological Society. Cheryl is a Registered Psychologist who is interested and has experience in utilizing evidence-based interventions in the treatment of adults and adolescents with a range of issues such as anxiety and affective disorders, stress-related issues, eating disorders, and adjustment disorders when undergoing life transitions.



Kia Naylor
Exercise Physiologist

Kia is the Director of BodyFit NT and Accreditated Exercise Physiologist with Australian Association of Exercise and Sports Science (AAESS). She studied at the University of South Australia in Human Movement (Exercise and Sport Science), and specialises in weight loss as well as helping all patients with chronic illness's with exercise. She has a clinical and passionate interest in exercise and what it can do for patients with cancer pre, post and during treatment.

For any all questions and enquiry's please contact her at bodyfitnt@bigpond.com or 0412 555 754.

Eila Allen and Marion Ozoiro
Reception Staff

Eila is the Practice Manager and Marion is Receptionist for the Darwin Obesity Surgery Centre, and are the first point of call. They can answer most queries you may have, including financial questions, will arrange necessary appointments, or will direct you to other practitioners affiliated with the Centre.












Darwin Obesity Surgery Centre
Darwin Private Hospital
Rocklands Drive
TIWI NT 0810


Phone (08) 7981 5694
Facsimile (08) 7981 5698

Email Us


Laparoscopic Surgery in Darwin

Weight Loss Surgery for Morbid Obesity

Surgical Procedures for Morbid Obesity

Weightloss options for Morbid Obeisty

Laparosocopic (Keyhole) Surgery for Severe Obesity

Endoscopic (Telescope) Surgery for Severe Obesity

Darwin Weight Loss Surgery

Diabetes and Obesity in Darwin

Weight Loss Surgery in Darwin

© Darwin Obesity Surgery Centre 2014 | Graphic Design by Simon Creedy