Doctor's Profile

Dr Dennis Koh

General Surgery

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Colorectal Practice


Mount Alvernia Hospital
820 Thomson Road
Medical Centre D #05-51
Singapore 574623

Clinic Hours

8.30am to 1pm & 2pm to 5.30pm (Mon – Fri), 8.30am to 1pm (Sat)


Dr Dennis Koh is a fully qualified and trained general surgeon,with sub-specialty training in Colorectal Surgery. He is currently the Medical Director and Senior Consultant Surgeon at Colorectal Practice.

Dr Koh graduated from University of Nottingham, UK. Prior to obtaining his medical degrees, Dr Koh also took a year off and obtained a Bachelor in Medical Science. He further his medical
education and embarked on his surgical training in Singapore. Heobtained his Master of Medicine in Surgery from National University of Singapore in 2005. He proceeded to complete his advance surgical training with Singapore General Hospital and became a fellow of the Royal College of Surgeons of Edinburgh in 2009. He was admitted as a Fellow of the Academy of Medicine (Surgery) of Singapore in the same year. He was awarded the SingHealth Health Manpower Development Plan (HMDP) Award and further his training in Hôpitaux Universitaires de Genève (HUG), Switzerland. Prior to setting up his own private practice, Dr Koh was a consultant surgeon in the Department of Colorectal Surgery in the Singapore General Hospital, one of the most progressive and comprehensive Colorectal Unit in Singapore.

Dr Koh has special interest in Colorectal surgery and has performed numerous colon and rectal surgeries, both open and minimally invasive. He believes that each surgery should be
adapt and tweak to each individual patient’s unique case and situation with minimal impact on patient’s lifestyle. Among the repertoire of surgical techniques Dr Koh offers include laparoscopic (key-hole), single port surgery, robotic surgery and transanal endoscopic operation (TEO). Dr Koh is also adept in the field of Endoscopy (colonoscopy and gastroscopy). To date, he has performed more than ten thousand endoscopic procedures, including endoscopic stenting and endoscopic mucosal resection (EMR).

Another field of interest Dr Koh excels in is proctology. During his fellowship in Geneva, he further honed his skills in proctology and pelvic floor disorders. These include conditions like haemorrhoids (piles), anal fistula, anal fissures, anal abscesses, functional constipation, and faecal incontinence.

Dr Koh provides a complete Colorectal as well as general Surgical
services: –

  • Endoscopy services (Colonoscopy & OGD) in screening,
    diagnosis and therapeutic procedures
  • Prevention, diagnosis and treatment of Colorectal Cancer
  •  Minimally invasive surgery (including robotic surgery) in
    bowel surgery for both benign and malignant diseases
  • Perianal conditions like haemorrhoids, anal fistula and
    anal fissure
  •  Pelvic floor and functional bowel disorders like irritable
    bowel syndrome, constipation, and faecal incontinence.
  • Surgical management of inflammatory bowel disorders
  • General Surgical management (usually laparoscopic) of
    gallbladder, hernia, and appendicitis