Internal medicine, sometimes known as general internal medicine in Commonwealth countries, is a medical speciality that focuses on the prevention, diagnosis, and treatment of illnesses of the internal organs. Internists, or physicians (without a qualifier) in Commonwealth countries, are internal medicine specialists. Internists are experts at treating patients with undifferentiated or multi-system illness processes.
Internists spend a lot of time in hospitals since their patients are typically extremely unwell or require extensive examinations. Internists frequently specialise in disorders that affect specific organs or organ systems.