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Dr. Ooi Wei Seong

Medical Director
Senior Consultant Medical Oncologist

​MRCP (UK), MB BCh BAO (Ireland)


About Dr. Ooi

Languages Spoken: English, Mandarin, Bahasa Indonesia, Bahasa Melayu, Cantonese

Department: Medical Oncology

Dr Ooi's expertise is around the area of Lung, Breast, and Colon cancers, with frequent updates on treatments for cancer at renowned medical oncology conferences worldwide multiple times a year. Management of all solid tumour types, bone health and mechanisms of bone metastases in cancer patients.

Clinical Interests & Contributions

With a special interest in breast, lung, gastrointestinal, and gynaecological cancers:

Dr Ooi has contributed to over 20 peer-reviewed publications on medical oncology, was involved in multiple investigator-initiated and pharmaceutical-led clinical trials, and frequently attends international conferences and meetings on cancer.

Dr. Ooi has also presented his research on bone health and mechanisms of bone metastases in cancer patients at these events. In addition, he enjoys giving public talks on cancer risks, screening, and treatment both locally and overseas.

Previously 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.

Recipient of the Singapore Health Quality Service Award in 2011.


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Fellow of Academy of Medicine Singapore (Medical Oncology)

Specialist Accreditation in Medical Oncology (Singapore)

Membership of Royal of College of Physicians of United Kingdom (Edinburgh), MRCP (UK)

MB BCh BAO BA (Honours)





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