Dr Geraldine 'Geri' Ooi


I am a specialist surgeon in Upper Gastrointestinal (UGI) and Bariatric surgery. I also perform a wide range of general surgery procedures. In particular, laparoscopic hernia repair, cholecystectomy, benign and malignant UGI surgery, including hiatus hernia repair and minimally invasive oesophagectomy and gastrectomy. 

I specialise in the treatment of oesophageal and gastric cancer, hiatal hernias and reflux disease, morbid obesity, achalasia and oesophageal dysmotility, using mainly minimally invasive laparoscopic and robotic approaches. 

I completed a PhD in 2019, focusing on bariatric surgery, fatty liver disease and metabolic syndrome. I subsequently underwent two years of sub-specialty upper gastrointestinal surgery training through the highly competitive AANZGOSA program in Perth and Melbourne, working in high volume bariatric and oesophagogastric cancer units. Subsequently, I underwent further training in Surgical Oncology in the world-renowned Memorial Sloan Kettering Cancer Center in New York, with a focus on robotic surgery and oesophagogastric cancer.

I am a consultant surgeon at Monash Medical Centre, and Senior Lecturer and Clinical Researcher in the School for Clinical Sciences at Monash University. I also work privately in Jessie McPherson Private Hospital and Mulgrave Private Hospital. 


General Surgery
Areas of Practice
  • Research
  • Upper Gastrointestinal
  • Hepato-Pancreato Biliary
  • Bariatric
  • Obesity
  • Surgical Oncology
Professional Associations
  • General Surgeons Australia
  • International Society for Esophageal Disease
  • Section of Academic Surgery
Professional Qualifications
  • Bachelor of Medicinec Bachelor of Surgery MBBS
  • Bachelor of Medical Science BMedSc
  • Doctor of Philosophy PhD
  • Fellow of the Royal Australasian College of Surgeons FRACS
  • Australia Aotearoa New Zealand Gastric and Oesophageal Surgery Association AANZGOSA
Photo of Surgeon
Consulting Rooms & Hospitals
Department of Upper GI Surgery246 Clayton Road, Clayton, VIC, 3168, AustraliaP: 03 9594 6207
301 Blackburn Road, Mount Waverley, VIC, 3149, AustraliaP: 03 9887 8530