A general physician is a highly trained specialist who provides a range of non-surgical healthcare to adult patients. He cares for difficult, serious or unusual medical problems, when the diagnosis may be difficult. The general physician's broad training provides expertise in the diagnosis and treatment of problems affecting different body systems, and in a variety of medical procedures essential for the diagnosis and management of severe and complex illness. Much of a general physician’s work takes place with hospitalised patients or with outpatients in clinics, both public and private. A general physician is frequently asked to review patients before surgery. He advises a surgeon of a patient's risk status, and can recommend appropriate management to minimise the risk of any operation. A physician can also assist with the management of ongoing medical problems or complications following surgery. A general physician usually sees a patient who has been referred to him by another doctor, usually the patient's general practitioner or another specialist.