For bookings and enquiries, please call 02 9899 6800 (Dr Dev Samarasinghe) or 02 9899 6828 (Dr Stephen Oh, Dr Calvin Chan)

Dr Calvin Chan


Dr Calvin Chan is a Consultant Gastroenterologist and Interventional Endoscopist with expertise in therapeutic endoscopy, including endoscopic ultrasound (EUS), endoscopic retrograde cholangiopancreatography (ERCP), and balloon enteroscopy. He received his degree in Medicine from the University of New South Wales and completed General Gastroenterology and Hepatology training at Royal North Shore Hospital, before undertaking fellowship training in Therapeutic Endoscopy at Sir Charles Gairdner Hospital in Perth, and the University of British Columbia in Vancouver, Canada.

Dr Chan is a Visiting Medical Officer at Norwest Private Hospital and Hornsby Ku-ring-gai Hospital, and a Senior Staff Specialist at Nepean Public Hospital, where he is currently Director of Endoscopy. He also performs procedures at Pennant Hills Day Surgery.

He is accredited with the Gastroenterological Society of Australia to perform gastroscopy, colonoscopy, EUS and ERCP.

Dr Chan’s interests include general gastroenterology, biliary and pancreatic disease, Barrett’s oesophagus, bowel cancer screening, inflammatory bowel disease and therapeutic endoscopy.

Dr Chan is actively involved in clinical research and teaching. He is a Clinical Senior Lecturer with the University of Sydney and has publications in multiple peer-reviewed journals. He has presented at national and international gastroenterology conferences. He is also a reviewer for several gastroenterology journals. He is committed to providing quality health care to all his patients in a friendly and approachable manner.

Consultation rooms

Hills Medical Specialists
Atlas Norwest
Suite 508 Level 5/2-8 Brookhollow Ave Norwest NSW 2153
Phone: 02 9899 6828
Fax: 02 9899 6830

Pennant Hills Gastroenterology
10 Ramsay Rd Pennant Hills NSW 2120
Phone: 02 9875 2311
Fax: 02 9980 9300