Doctor's Profile

Dr Calvin Koh Jianyi


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The Gastroenterology Group Pte. Ltd.


Mount Alvernia Hospital
820 Thomson Road
Medical Centre A #02-08
Singapore 574623

Clinic Hours

2pm to 5pm (Mon – Fri)
9am to 1pm (Sat)


Dr Calvin Koh, gastroenterologist with training in advanced endoscopy, graduated from the National University of Singapore (NUS) and completed specialist training at the National University Hospital (NUH). He furthered his expertise with an advanced endoscopy fellowship under the American Society for Gastrointestinal Endoscopy at the University of Florida, USA.

Dr Koh previously served as Senior Consultant and Director of Endoscopy at NUH, and was also an assistant professor at the NUS Yong Loo Lin School of Medicine. He is a fellow of the Royal College of Physicians (London) and the American Society of Gastrointestinal Endoscopy.

Besides gastroscopy and colonoscopy, Dr Koh also performs endoscopic ultrasound, endoscopic retrograde cholangiopancreatography, small bowel enteroscopy, radiofrequency ablation of Barrett’s dysplasia, percutaneous endoscopic gastrostomy, nasojejunal feeding tube placements, and endoscopic mucosal resection of colon polyps.