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Dr. Ooi Wei Seong

Dr. Ooi Wei SeongVerified

Doctor in Singapore


Dr. Ooi Wei Seong is a medical oncologist specialising in genitourinary (kidney, prostate, bladder, and testicular) cancer as well as cancers of the head, neck, and lung.

He graduated with honours distinction from Trinity College Dublin in Ireland in 1999 and in 2003, he obtained membership of the Royal College of Physicians (MRCP) of the United Kingdom. He then joined St. Vincent’s University Hospital in Dublin for his oncology training and spent three years as a clinical fellow at Sunnybrook Odette Cancer Centre in Toronto, Canada.

Upon his return to Singapore, Dr. Ooi served at the National Cancer and Raffles Cancer Centres. He was also a visiting consultant at KK Women’s and Children’s Hospital and clinical tutor at Yong Loo Lin School of Medicine. Because of his commitment to providing the highest standards of medical care to cancer patients, he was given the Singapore Health Service Award in 2001.

Dr. Ooi is actively involved in multiple investigator-initiated and pharmaceutical-led clinical trials that aim to improve cancer care in the region. He also regularly contributes to peer-reviewed journals and presents at various international oncology meetings.

Dr. Ooi is a Fellow of the Academy of Medicine of Singapore (FAMS).

  • Bachelor of medicine and bachelor of surgery, Trinity College Dublin, the University of Dublin, 1999
Medical training
  • Internship in internal medicine, St. Vincent's University Hospital, 2000
  • Fellowship in medical oncology, National University Hospital, 2015
  • Residency in medical oncology, St. Vincent's University Hospital, 2006
  • Fellowship in medical oncology, Sunnybrook's Odette Cancer Centre, 2009
  • Royal College of Physicians, 2003
  • Academy of Medicine, Singapore, 2012
Professional Memberships
  • Singapore Medical Council
Languages spoken
  • Mandarin
  • Indonesian
  • Cantonese
  • Malay
  • Teochew
  • Chinese (Simplified)
  • English
  • AIA
  • Aviva
  • IHP
Affiliated Hospital
International Cancer Specialists
International Cancer Specialists['Internal medicine', 'Medical oncology'] in Singapore
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International Cancer Specialists (ICS) at the Paragon Tower in Singapore provides outpatient services for the screening, diagnosis, treatment, and management of cancer. The clinic is staffed by a team of physicians and surgeons specialising in the treatment of specific tumour types and different methods of cancer treatment (medical, radiation, and surgical oncology). Driven to provide comprehensive cancer care, the clinic collaborates with state-of-the-art facilities to serve patients requiring other services, such as nuclear medicine and minimally invasive and robotic-assisted surgery. The clinic is helmed by Dr. Ooi Wei Seong, a medical oncologist with more than 10 years of practice experience. He completed his oncology training at St. Vincent's University Hospital in Dublin and Sunnybrook Odette Cancer Centre in Canada where he served as an oncology fellow for three years. He has a keen interest in lung, breast, and colon cancers as well as bone health and mechanisms of bone metastases in cancer patients.

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Language Spoken: Cantonese ,Mandarin ,English ,Chinese (Simplified)
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Language Spoken: Hokkien ,Cantonese ,Mandarin ,Chinese (Simplified) ,English
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