Dr. Ooi Wei Seong

Medical Oncology (Cancer)

Credentials MB BCh BAO (Ireland)
FAMS (Medical Oncology)
Language English, Mandarin, Bahasa Melayu, Bahasa Indonesia, Cantonese

Dr Ooi Wei Seong has keen interest in lung cancer, head & neck cancer, gastro-intestinal cancer and genitourinary cancers. In addition to the management of all solid tumour types, he also has special interest in bone health and mechanisms of bone metastases in cancer patients. Dr Ooi was a recipient of the Singapore Health Quality Service Award in 2011 for his exemplary service to patients.

Dr Ooi Wei Seong is actively involved with multiple investigator-initiated and pharmaceutical-led clinical trials. He has also contributed to publications in peer-reviewed journals. His research has been presented at various international oncology meetings. Dr Ooi 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 at the National University of Singapore in addition to providing teachings to junior doctors, nurses, Duke-NUS students, and elective fellows.


Dr Ooi Wei Seong is a medical oncologist who graduated from Trinity College Dublin with honours distinction in 1999. He started his oncology training at St Vincent’s University Hospital in Dublin and then 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.