MB BS 1999 London; FRACS (GS) 2013

Mr Mark Grant is a Dunedin-based Upper Gastrointestinal and Bariatric Surgeon providing specialist surgical care across Dunedin, Queenstown, Wānaka, Invercargill, Otago and Southland.

He specialises in weight loss (bariatric) surgery, anti-reflux surgery, hernia repair, and gallbladder surgery, offering both advanced laparoscopic and minimally invasive techniques tailored to each patient.

Mark has a particular interest in the management of obesity as a chronic disease, as well as conditions affecting the oesophagus and stomach, including gastro-oesophageal reflux disease (GORD), hiatal hernia, and cancers of the stomach and oesophagus.

Originally from London, Mark graduated from Imperial College School of Medicine before moving to New Zealand, where he completed his General Surgical training and was awarded Fellowship of the Royal Australasian College of Surgeons (FRACS) in 2013. He first came to Dunedin as a medical student and developed a strong connection to the region.

He subsequently completed advanced subspecialty training in the United Kingdom, including an Oesophagogastric Fellowship at University Hospital Southampton. He later worked as a Consultant Oesophagogastric Surgeon at both University Hospital Southampton and Queen Alexandra Hospital in Portsmouth, managing complex benign and malignant upper gastrointestinal conditions.

In 2017, Mark returned to New Zealand to complete dedicated Bariatric Surgery training at Waitematā DHB, gaining extensive experience in gastric sleeve, gastric bypass, and revisional bariatric procedures.

He is currently an Upper Gastrointestinal and Bariatric Surgeon at Te Whatu Ora Southern, delivering specialist care locally so patients across Otago and Southland can access high-quality surgical treatment without needing to travel out of region.

Mark works closely with a multidisciplinary team, including dietitians and psychologists, to provide a comprehensive, long-term approach to weight loss and metabolic health.

What does Mr Mark Grant specialise in?
Mr Mark Grant is a Dunedin-based Upper GI and Bariatric Surgeon specialising in weight loss surgery, reflux surgery, hernia repair, and gallbladder surgery for patients across Otago and Southland.

Where does he see patients?
Consultations are available in Dunedin, Queenstown, Wānaka, Ōamaru, and Invercargill, providing local access to specialist care.

What procedures does he perform?
He performs gastric sleeve, gastric bypass, anti-reflux surgery, hernia repair, and gallbladder removal, using minimally invasive (laparoscopic) techniques where appropriate.

Do patients need a GP referral?
Both GP referrals and self-referrals are accepted, depending on the service.

Weight loss (bariatric) surgery

• Gastric sleeve surgery
• Gastric bypass surgery (Roux-en-Y and one-anastomosis gastric bypass)
• Revisional bariatric surgery
• Medical weight loss options

Anti-reflux surgery (GORD surgery)

• Laparoscopic fundoplication
• Hiatal hernia repair
• Investigation and management of reflux disease

Hernia surgery

• Inguinal hernia repair
• Ventral and incisional hernia repair
• Hiatal (diaphragmatic) hernia repair

Gallbladder surgery

• Laparoscopic cholecystectomy (gallbladder removal)
• Gallstones and gallbladder polyps

Upper gastrointestinal conditions

• Oesophageal motility disorders
• Dysphagia investigation
• Oesophageal and gastric cancer management (including GISTs)

General surgery

• Assessment and management of common surgical conditions

General, Upper GI and Bariatric Surgeon

Professional Memberships and Appointments

• Australia and Aotearoa New Zealand Gastric and Oesophageal Surgery Association (AANZGOSA)
• Australian & New Zealand Metabolic and Obesity Surgery Society
• Fellow of the Royal Australasian College of Surgeons (RACS)

Academic Qualifications
Master of Medical Science (MMedSci)
Title of Thesis: Anatomical and physiological characterisation of a novel porcine model for varicose veins
Postgraduate research degree involving laboratory-based translational surgical research. The thesis developed and validated a large-animal (porcine) model of chronic venous disease, examining venous anatomy, valve competence, haemodynamics, and vein wall remodelling under conditions of sustained venous hypertension. The work demonstrated that varicose veins represent a combined disorder of venous valve failure and intrinsic vein wall pathology, providing a platform for further investigation into surgical and endovascular interventions.

Male / Tāne

12 December 2002

General Surgery

English