Experts Introduction
CIH Singapore Oncologists

Education & Training 

Dr Ooi Wei Seong is a Medical Oncologist who graduated from Trinity College Dublin with honours distinction in 1999. He subsequently obtained MRCP (UK) certification and became a member of the Royal College of Physicians of UK in 2003. He started his oncology training at St Vincent’s University Hospital in Dublin after that and later spent three years at Sunnybrook Odette Cancer Centre in Toronto, Canada as a clinical fellow in oncology. He then returned to Singapore and obtained his specialist accreditation in medical oncology.

Prior to joining Harley Street Clinic Singapore, Dr. Ooi was practicing at National Cancer Centre Singapore (NCCS). He was also a Visiting Consultant to KK Women’s and Children’s Hospital. He was a recipient of the Singapore Health Quality Service Award in 2011 for his exemplary service to patients. He subsequently joined Raffles Cancer Centre subspecialising in head and neck, lung and genitourinary cancers. He is now a visiting specialist at the National Cancer Centre Singapore.

Research & Teaching

Besides general oncology, Dr. Ooi has keen interest in lung cancer, head & neck cancer, gastro-intestinal cancer and genitourinary cancers. He is also actively involved with multiple investigator-initiated and pharmaceutical-led clinical trials. He has also contributed to publications in peer-reviewed journals. In addition to the management of all solid tumor types, he also has special interest in bone health and mechanisms of bone metastases in cancer patients. His research has been presented at various international oncology meetings.

He has given talks to overseas oncologists and general practitioners on managements of cancers in the region. He has also spoken at local GP symposiums and conducted Cancerwise workshops, public forums aimed at providing comprehensive information on specific cancers. He was a Clinical Tutor at Yong Loo Lin School of Medicine, in addition to providing teachings to junior doctors, nurses, Duke-NUS students, and elective fellows. He is also a Fellow of the Academy of Medicine of Singapore.

Name: Dr. Ooi Wei Seong


MB BCh BAO (Ireland), MRCP (UK), FAMS (Medical Oncology)


Medical Oncologist

Clinical Interests: 

Lung cancer, head & neck cancer, gastro-intestinal cancer and genitourinary cancers, bone metastases 


Senior Consultant