Dr Loh graduated from University of Malaya in 1999. He had his basic medical training in Malaysia and subsequently obtained his membership of Royal Colleges of Physicians of the United Kingdom (MRCP) and Master of Medicine from National University of Singapore in 2006.

He pursued his specialist training in Singapore in both gastroenterology and advanced internal medicine. Dr Loh has become one of the few doctors in Singapore who is accredited by Ministry of Health and registered as specialist in two specialties. With his background in gastroenterology and advanced internal medicine, he is experienced in managing complex gastroenterology and general medical problems, which are often interrelated and need holistic approach in the management.

He has interest in the treatment of advanced liver diseases. This led him to be later trained under Professor Chen Chao Long, who is pioneer in living donor liver transplantation, in Kaohsiung Chang Gung Memorial Hospital. The hospital is the leading hospital in Asia performing living donor liver transplantation.

He worked as a consultant in Changi General hospital after his return from his training. He continued to provide medical care for patients with both gastroenterological and general medical problems. He provided his expertise in the coordination of care for patients with advanced liver diseases with transplant centres in Singapore and was also instrumental in the setting up of the liver clinic in Changi General hospital, which treated the most number of viral hepatitis C patients in Singapore.

He is easy approachable and well versed in several languages (English, Mandarin, Malay, Hokkien, Cantonese). For this, he is well liked by his patients and was previously accorded several awards by the institutions for his service excellence.

He was also actively involved in the training of the young doctors and was a clinical senior lecturer to medical students from NUS Yong Loo Lin school of medicine and also a core faculty for Singhealth senior residency program to train young gastroenterologist.