Dr Calvin Koh Jianyi specialises in diagnosing and treating a wide range of gastrointestinal conditions, with expertise in interventional endoscopy and pancreatobiliary disease. He performs advanced procedures such as EUS, ERCP, small bowel enteroscopy, and endoscopic mucosal resection. Dr. Koh trained at NUH and completed a prestigious fellowship in advanced endoscopy at the University of Florida. He previously served as Senior Consultant and Director of Endoscopy at NUH, and also taught as an Assistant Professor at NUS. He actively contributes to research and education in gastroenterology while practicing at The Gastroenterology Group across multiple locations in Singapore.