Dr Ooi Wei Seong

Medical Oncologist
20 years of experience


Medical Oncology

Consultation Fee

$120 and above

Clinical Interest

Breast, Lung & Gastrointestinal Cancers


MB Bch BAO BA (Honours), MRCP (UK), Specialist Accreditation in Medical Oncology (SG)

What I do

Dr Ooi Wei Seong provides medical services such as: 
* Cancer Screening
* Diagnosis and Treatment of Adult Cancer
* Breast Cancer Treatment
* Gastrointestinal Cancer Treatment
See more [ + ]* Lung Cancer Treatment
* Genitourinary Cancer Treatment
* Head and Neck Cancer Treatment
* Chemotheraphy
* Targeted Therapy
* Immunotherapy
* Hormonal Therapy

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Clinic Locations

International Cancer Specialists
290 Orchard Rd, #15-01/02
Paragon Tower 1, Lobby F
Singapore, 238859
There are no appointments available for this week.

Professional Statement

Dr. Ooi Wei Seong has over 15 years of practicing experience as a medical oncologist in Ireland, Canada, and Singapore. He completed his MB BCh BAO BA (Honours) from Trinity College Dublin in 1999 and is accredited with the MRCP (UK) and FAMS (Singapore). 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, before practicing at the National Cancer Centre Singapore.

... See more [ + ]On top of his clinical experience in medical oncology, Dr. Ooi Wei Seong has special interest in breast, lung, gastrointestinal, and head & neck cancers. He 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 Wei Seong 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.

Dr. Ooi Wei Seong was also Clinical Tutor at the Yong Loo Lin School of Medicine, National University of Singapore, teaching junior doctors, nurses, Duke-NUS students, and elective fellows. He is married with a daughter, and enjoys cycling and good food with his family in his spare time.

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Languages Spoken

English, Indonesian, Malay, TeoChew, Cantonese, Mandarin


International Medical College, Malaysia (1993-1996), Trinity College Dublin, Ireland (1996-1999)

Awards and Publications

To View Dr Ooi Wei Seong's awards and publications, please click on this link

Professional Positions and Memberships

Fellow of Academy of Medicine Singapore, Member of Royal College of Physicians of United Kingdom (Edinburgh), MRCP (UK)

Accredited Hospitals

Farrer Park Hospital
Gleneagles Hospital
Mount Alvernia Hospital
See more [ + ]Mount Elizabeth Novena Hopsital
Mount Elizabeth Orchard Hospital

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Insurances Accepted

Aviva /Aviva PCP Care
See more [ + ]Parkway Shenton
Pru Priority Plus
Prudential MHC
Cigna / IXChange
Great Eastern

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