About Gisborne Surgical Associates

Gisborne Surgeon Peter Stiven consults and performs minor procedures upstairs at the Three Rivers Medical Centre. More involved procedures, including endoscopy, which require sedation or anaesthesia, are performed at Chelsea Hospital.


You can see a full list of our surgical procedures here.


Gisborne Surgeon Dr Peter Stiven

Peter Stiven


General, Laparoscopic and Upper GI Surgeon

Peter was born and bred in the south of the South Island and obtained his medical degree from Otago.


Christchurch became the base for much of Peter’s surgical training and he achieved FRACS in 2009. Peter left for Melbourne just prior to the first earthquake to undertake an ANZGOSA fellowship in upper GI and Bariatric surgery. This training was conducted at Austin Hospital in Melbourne and Royal North Shore in Sydney, as well as affiliated private institutions. Following this, he spent some time working in Out-Back Australia, East Timor and Several centers in New Zealand before discovering Gisborne. Since settling in Gisborne he has established both public and private practices in the broad field of General Surgery as well as setting up Bariatric services in both sectors.


(I do a little tree surgery too  https://www.youtube.com/watch?v=iQHNjdw1lvE )

Sarah Garrett

RN, BHSc (Nsg), PG Diploma HSc

Clinical Nurse Specialist

I am a Bariatric Nurse Specialist who is passionate about providing the necessary holistic support and knowledge pre or post bariatric surgery. I am also able to provide you support and advice in regards to your sleep apnoea treatment which can effect people with weight issues.


Pre-operatively I endeavour to provide you with knowledge and support as to undertake your weight loss journey, feeling confident and assured you are making an informed decision.


Post-operatively my aim is to provide you with ongoing support that ensures you get the most out of your surgery and move forward to maintain all that you learn through the process.


“Most people have no idea how good their body is designed to feel” – Kevin Trudeau.

Mary Hope


Mary is a registered dietitian with a particular interest in healthy eating and green perscription. Her main role is using her expertise to educate patients before and after weight loss surgery. Mary also has expertise in nutritional support following complex abdominal surgery.

Amberley Meredith

Clinical Psychologist

Amberley is a NZ Registered Psychologist and published author with degrees in Psychology and Health Psychology. She has worked in the health and well being sector for nearly 20 years across continents and cultures. Amberley provides expert Psychological support and coaching for those undergoing life changing surgery such as Weight loss surgery. For more information please visit Amberley’s website.