Internal medicine
is concerned with systemic diseases of adults, i.e. those diseases that affect the body as a whole (restrictive, current meaning), or with all adult non-operative somatic medicine (traditional, inclusive meaning), thus excluding pediatrics, surgery, gynecology and obstetrics, and psychiatry. Practitioners of such specialties are referred to as physicians. There are several subdisciplines of internal medicine:
Cardiology
Critical care medicine
Endocrinology
Gastroenterolog
Hematology
Hepatology
Infectious diseases
Nephrology
Oncology
Proctology
Pulmonology
Rheumatology
Sleep disorder
Neurology
Geriatrics
