Dr Kwok obtained his medical degree from the National University of Singapore (NUS) in 1990. He further qualified in internal medicine with Master of Medicine from NUS. He became a Member of the Royal College of Physicians (U.K.), after qualifying with a diploma from the Royal College in Edinburgh, Scotland in the U.K. He trained in cardiology at the National University Hospital & National Heart Centre in Singapore, and completed a fellowship in Heart Failure & Heart Transplantation at Stanford University School of Medicine in USA.