The Department of Medicine at Charlotte Maxeke Johannesburg Academic Hospital is divided into 11 units (Cardiology, Clinical Haematology, Dermatology, Endocrinology, Gastroenterology, Infectious Diseases, Medical Oncology, Nephrology, Neurology, Pulmonology and Rheumatology) and has 250 beds spread across 10 wards and two high care units (Coronary Care Unit and Transplant Unit). The department serves the Greater Johannesburg area and acts as a tertiary referral centre for a number of secondary hospitals in Southern Gauteng.