Dr Tan is a cardiologist at Seven Hills in Sydney. He has been practicing for more than 20 years and is a highly experienced and respected cardiologist. He specialises in the diagnosis and treatment of heart disease, including coronary artery disease, heart failure, arrhythmias, and hypertension. He also provides preventive cardiology services, including lifestyle advice and risk factor modification. He is a Fellow of the Royal Australasian College of Physicians and a member of the Cardiac Society of Australia and New Zealand.