Raffles Shield Panel Specialists

Dr Calvin Koh

Clinic Details


Clinic Address: 6A Napier Rd Gleneagles Hospital Annexe Block #05-37 Singapore 258500

Clinic number: 6476 7555

Operating hours: Mon – Fri: 8.30AM - 1PM, 2PM - 5PM

Sat: 9am – 1pm


Clinic Address: 319 Joo Chiat Place Parkway East Medical Centre #04-01 Singapore 427989

Clinic number: 6297 0688

Operating hours: Mon – Fri: 2PM - 5PM

Sat: Closed

Dr Koh Jianyi Calvin is a specialist physician in Gastroenterology and Hepatology.

He obtained his medical degree (MBBS) from the National University of Singapore (NUS) and underwent further medical training at the National University Hospital (NUH), where he served as chief resident in the department of medicine and completed his membership of the Royal College of Physicians, United Kingdom (MRCP). He then joined the division of gastroenterology and hepatology, completing his Advanced Specialist Training (AST) in gastroenterology. Dr Koh subsequently obtained his specialist accreditation from the Specialist Accreditation Board (SAB) of Singapore and is a fellow of the Academy of Medicine Singapore.

Following completion of specialist training, he was awarded an Academic Medicine Development Award and undertook an advanced endoscopy fellowship under the auspices of the American Society for Gastrointestinal Endoscopy (ASGE) with the Division of Gastroenterology, Hepatology and Nutrition at the University of Florida, USA to further his interest in interventional endoscopy, where he trained in endoscopic ultrasonography, endoscopic retrograde cholangiopancreatography, luminal stenting and endoscopic mucosal resection of colon polyps

Prior to joining The Gastroenterology Group, he was senior consultant at NUH, where he also served as director of endoscopy, as well as at the NUS Yong Loo Lin School of Medicine with clinical and research interests in endoscopy, pancreatobiliary disease, gastric and colon cancer, where he retains an role as adjunct assistant professor.

His clinical workload consisted of both seeing general gastroenterology and hepatology patients, seeing a range of complex gastroenterology cases, and as a consultant on the inpatient endoscopy service, contribute to care by scoping the patients on the wards, with a workload comprising both general endoscopy and advanced endoscopy cases, including covering endoscopic ultrasound and endoscopic retrograde cholangiopancreatography, as well as emergency endoscopy for gastrointestinal haemorrhage. In addition, he performs deep enteroscopy such as single balloon and spiral enteroscopy and has the privilege to be involved in the first total enteroscopy case in NUH.

He is passionate about endoscopy training and education, being previously involved in training as a gastroenterology core training faculty member, as well as a member of the national gastroenterology residency advisory committee.

He is currently a committee member of the Chapter of Gastroenterology under the College of Physicians in the Academy of Medicine, Singapore and contributed to guidelines to support the chapter in endoscopic sedation as well as a the management of gastric pre-malignant conditions.  He is also a Fellow of the Royal College of Physicians (FRCP) (London), as well as the American Society of Gastrointestinal Endoscopy (FASGE).

Besides gastroscopy and colonoscopy, he also performs endoscopic ultrasound (EUS), endoscopic retrograde cholangiopancreatography (ERCP), placement of luminal stents and endoscopic mucosal resection of large colon polyps, capsule endoscopy and small bowel enteroscopy.

MBBS (NUS, Singapore) 2006
MRCP (UK) (RCP, United Kingdom) 2011
M Med (Int Med) (NUS, Singapore) 2012
FAMS (Gastroenterology) (Academy of Medicine, Singapore) 2015
FRCP (RCP, London, United Kingdom) 2020