Dr Nigel Rajaretnam

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Dr Nigel Rajaretnam

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Consultant Upper GI, Bariatric, Endocrine and General Surgeon Nigel Rajaretnam graduated with Honours from Trinity College Dublin, Ireland in 2008.

He began his surgical training in Ireland, as part of the Basic Surgical Training (BST) and Basic Specialist Training (BSpT) programs. He became a member of the Royal College of Surgeons in Ireland in 2011. He then sought further training opportunities in New Zealand in 2012. He obtained his Fellowship of the Royal Australasian College of Surgeons in 2019. He undertook further post fellowship specialist training in Endocrine and Bariatric Surgery in Waikato Hospital in Hamilton in 2019. After completion of the Fellowship, he worked as a Consultant Surgeon at Waikato Hospital. Nigel then left New Zealand in 2021 with his young family to move back to Dublin for a year for a much coveted Fellowship position. He was the Fellow in Upper GI Surgery at the National Centre for Oesophageal and Gastric Cancer at St James's Hospital, Dublin. His fellowship was focused on Surgery for Upper Gastrointestinal cancers and Interventional Endoscopy. He was appointed as an Assistant Professor in Surgery at Trinity College, Dublin, during this Fellowship. To date - this is one of the proudest moments in Nigel’s academic career - to be back in Trinity College, contributing to the same medical school that trained him. Nigel is a Consultant Surgeon with specialty interest in Upper GI Surgery and Endocrine Surgery. He is excited to be able to offer clinical knowledge and skills to patients both at Intus Dunedin and at Te Whatu Ora(Southern), Dunedin Hospital. For more information on his research projects, please see his ResearchGate profile. He is also a Clinical Senior Lecturer in the School of Medicine with the University of Otago.

23/10/2026

Proud big brother watching my sister receive her Fellowship in Radiation Oncology at the RANZCR ASM in Christchurch! Plenty of hard work - but worth it!

Another Dr. Rajaretnam helping patients - this time a Radiation Oncologist ! The Royal Australian and New Zealand College of Radiologists

20/10/2026

My first clinic at the new Health NZ - Southern Dunedin Outpatients Building!

It's so new and beautiful - so much thought and planning has been put into it. What a lovely place to work and I'm so thankful that this is what I get to do for a job 💕

12/10/2026

Looking forward to meeting everybody (virtually) for this talk and I can't wait to answer your questions and hear about your experience!

Why can obesity be so difficult to treat, and why is weight regain so common?

Join Dr Nigel Rajaretnam online on Wednesday 14 October, 6–7pm as he explores the biology of obesity and the role of behavioural support, medications and metabolic surgery in long-term treatment.

Open to GPs and Nurse Practitioners nationwide, register free here - tinyurl.com/intus-CME-Oct *This CME is RNZCGP endorsed and approved for 2 CME credits, and all registrants will receive the recording.*

30/09/2026

23/09/2026

10/09/2026

Wonderful two days giving talks in both Dunedin and Invercargill on Mounjaro (Tirzepatide) - plenty of questions from a room full of doctors, nurses, dietitians, pharmacists and trainees.

I was able to discuss my approach to using the medication, and how important doing it in integrated health team to maximize the benefits for the patient.

18/08/2026

Very proud of our team at Intus Specialist Health Care

Comprehensive weight management care means looking beyond the scales and understanding the bigger picture of a patient’s health and wellbeing.

At Intus Dunedin, patients have access to a wide range of treatment options including medication, endoscopic bariatric procedures, and surgery when appropriate, all supported by specialist guidance.

Care is delivered by an integrated team lead by Dr. Nigel Rajaretnam , that includes bariatric surgeon, bariatric physician, plastic surgeon, hepatologist, specialist nurses, gynaecologists, bariatric dietitians, psychologists, and dedicated support staff working towards the same goal.

By bringing these services together under one roof, patients are supported with continuity of care throughout their weight management journey.

15/08/2026

ANZMOSS Day 2 was just as good as day one ! Moderating a session with Dr Jason Free was a great experience. Still managed to catch up with a lot of the metabolic/bariatric surgery team mentors at the Austin Austin Health and our ANZMOSS fellows group JRab to explore Hobart before leaving this amazing State.

I think it is so important to have these relationships surgeons around the world to discuss difficult cases, or ask for a second opinion. I am very thankful to have these colleagues whom I can count on - not just here in Australia, but in New Zealand and Dublin.

13/08/2026

My year as an ANZMOSS Fellow was recognized yesterday at our yearly scientific conference.

Thank you to our president Nick Williams for the lovely words when presenting my certificate of completion of my Fellowship with ANZMOSS .

The year taught me some complex surgical skills, but also to be a good surgeon you need to listen, advocate and be empathetic to your patients. I continue to learn from my mentors at Austin Health and am so grateful for their friendship.

Thank you to Health NZ - Southern and University of Otago - Ōtākou Whakaihu Waka for supporting my year away to do this fellowship. And Medtronic for their continued support.

05/08/2026

Epic views today on the flight to cold Central Otago (-8 degrees) for an outreach clinic !

My job takes me to really epic places and serves amazing views ❤️

Address

89 Great King Street
Dunedin
9016

Telephone

+6439775977

Website

https://www.intus.co.nz/our-specialist-team/dr-nigel-s-rajaretnam

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