Dr Wong Nan-Yaw MBBS (Singapore), FRCS (Edin.)
Colorectal and general surgeon at Mount Elizabeth, Singapore
Member of the Society of Colorectal Surgeons (Singapore)
Treats piles, anal fissures and fistulas, polyps and bowel cancer, and performs colonoscopy and gastroscopy. In private practice at Mount Elizabeth since 2008.
Dr Wong is a panel doctor of Alliance Medinet, a corporate insurer network
Alliance Medinet serves corporate insurance plans from these insurers.
Dr Wong can request pre-authorisation from Prudential and AIA before your procedure, and the clinic writes in to other insurers in the same way, so you have your insurer’s answer before anything begins. Pre-authorisation is decided by the insurer and is not a guarantee of payment.
Prudential patients can claim when Dr Wong operates at Aptus Surgery (Paragon), a day surgery centre listed on Prudential’s PRUPanel Connect.
Fees are guided by MOH benchmarks and depend on case complexity. How fees and insurance work. In an emergency, call 995.
- Years in medicine
- 33Years in medicineMBBS, National University of Singapore, 1993
- Years as an accredited specialist
- 23Years as an accredited specialistSingapore Medical Council, 2003
- Years in private practice
- 18Years in private practiceMount Elizabeth Medical Centre, since 2008
Accreditation and memberships
MBBS (Singapore)
National University of Singapore
FRCS (Edinburgh)
Royal College of Surgeons of Edinburgh
Accredited specialist
Singapore Medical Council
Fellow
Academy of Medicine, Singapore
Member
Society of Colorectal Surgeons, Singapore
Why he chose colorectal surgery
“In this early stage the cancer is very small, maybe about one centimetre, symptom-free and therefore silent.”
A one-minute interview: why he sub-specialised in colorectal surgery, the conditions he treats, and why bowel cancer is often found late.
About 30,000 procedures as of 2026
What are you noticing?
Start with the symptom.
- Blood on the paper or in the bowlOften piles, but worth checking. See haemorrhoids
- Sharp pain when passing stoolA small tear in the anal lining. See anal fissure
- A painful swelling near the anusNeeds prompt assessment. See perianal abscess
- Discharge or a recurring boilA tunnel that follows an abscess. See anal fistula
- Bowel habit change, or age 50 and overScreening and investigation. See colonoscopy
- Polyps found, or a family historyRemoval prevents cancer. See colon polyps
- Leaking, urgency or a bulgeCommon and treatable. See faecal incontinence
- A diagnosis of bowel cancerStaging, surgery and follow-up. See colorectal cancer
Black stools, heavy bleeding, severe pain with fever, or a swelling that is spreading need same-day care. Call 995 or go to an emergency department.
About Dr Wong Nan-Yaw
Dr Wong graduated from the National University of Singapore in 1993 and became a Fellow of the Royal College of Surgeons of Edinburgh in 1998. He sub-specialised in colorectal surgery at Singapore General Hospital, trained in the United Kingdom and New York, and became an accredited specialist in 2003. He is a Fellow of the Academy of Medicine, Singapore, and a member of the Society of Colorectal Surgeons, Singapore.
- MBBS
- National University of Singapore, 1993
- FRCS Edinburgh
- Royal College of Surgeons of Edinburgh, 1998
- Accredited specialist
- Singapore Medical Council, 2003
Conditions and procedures
Anus and back passage
Colon and rectum
Looking for something else? See the full list.
Your first visit
Step 1
You describe what is happening
Dr Wong listens first, asks about bowel habit, bleeding, pain and family history, and reviews any scans or reports you bring.
Step 2
A short, private examination
Most anal and rectal problems can be assessed in the clinic with an examination and a brief look with a small scope. Colonoscopy is arranged if you need one.
Step 3
A clear plan and cost
You leave knowing the likely diagnosis, the options from simplest to most involved, and the expected cost, including what MediSave and insurance may cover.
Common questions
What does a colorectal surgeon treat?
A colorectal surgeon treats conditions of the colon, rectum and anus. These include haemorrhoids (piles), anal fissures, fistulas and abscesses, polyps, colorectal cancer, diverticular disease, inflammatory bowel disease and bowel control problems. A surgeon can also perform colonoscopy and gastroscopy.
Should I worry about blood on the toilet paper?
Bright red blood on the paper is most often caused by haemorrhoids or a small anal tear, but bleeding should not be assumed to be harmless. Blood mixed through the stool, black stools, weight loss or a change in bowel habit need prompt assessment. A short examination usually gives a clear answer.
At what age should I have a colonoscopy?
Singapore's national screening programme starts at age 50 for people at average risk. Screening begins earlier if a close relative had bowel cancer or polyps. Anyone with bleeding or a persistent change in bowel habit should be assessed at any age. The colonoscopy page explains preparation, sedation and what is found.
Do I need a referral to see Dr Wong?
No. You can call the clinic directly to book. A referral letter from your general practitioner can help with insurance and with sharing earlier records, so bring it if you have one along with any recent scan or blood test results.
Can I use MediSave or insurance for treatment?
MediSave can often be used for approved surgical procedures and day surgery, within withdrawal limits that depend on the procedure. Integrated Shield plans and private insurers vary in what they cover. Each condition page has a cost and MediSave section, and the clinic can explain your options before you decide.
Where is the clinic?
The clinic is at 3 Mount Elizabeth, #09-02, Mount Elizabeth Medical Centre, Singapore 228510, a short walk from Orchard Road. It is open Monday to Friday 9:00 am to 5:00 pm and Saturday 9:00 am to 12:30 pm.