Dr Quah is a doctor in the Department of General Medicine in Tan Tock Seng Hospital since year 2010.

He graduated from the University of Malaya and went on to obtain Membership of the Royal College of Physicians (United Kingdom). He completed specialist training in Advanced Internal Medicine under the NHG Health.

Dr Quah is also involved in both undergraduate and postgraduate medical education, and holds teaching appointments with both Lee Kong Chian School of Medicine, Nanyang Technological University (NTU) and Yong Loo Lin School of Medicine, NUS.

Dr. Quah also serves as the Assistant Chief Clinical Informatics Officer for Tan Tock Seng Hospital.