Internal medicine, or general internal medicine, is the medical specialty dealing with the prevention, diagnosis, and treatment of internal diseases. Doctors specializing in internal medicine are called internists, or physicians in Commonwealth nations.

Internal medicine, medical specialty that deals with the diagnosis and medical, as opposed to surgical, treatment of diseases of adults. It is broadly identical with the practice of the physician, as opposed to that of the surgeon. Internal medicine, which deals with the entire patient rather than a particular organ system, is in effect the parent of other medical specialties such as cardiology, dermatology, and gastroenterology.

Internal medicine physicians typically treat adults and specialize in the prevention, diagnosis and management of disease and chronic conditions. General Practice – General Practice physicians are like family practice physicians and can treat patients of any gender or age.