An internist is not an intern, and not quite a family doctor either
Internists are fully trained specialists in adult disease, the doctors called when symptoms such as fatigue, confusion or weight loss refuse to point at a single organ. The name confuses people twice over: it sounds like intern, a doctor not yet licensed, and it is often mistaken for family medicine. Its roots lie in German Innere Medizin.
Internal medicine, called general medicine across much of the Commonwealth, covers prevention, diagnosis and treatment of illness in adults, and the word internal originally meant diseases of the internal organs. North Americans say internist; Britain says physician. These doctors look after patients both in hospital and in clinics, because the people they see are often very unwell or need many tests. Many also teach and do research, and the specialty exists in clinical pharmacy and veterinary medicine as well.
The English term comes from the nineteenth-century German phrase Innere Medizin, which meant hunting for the hidden pathological cause of symptoms by combining lab tests with bedside examination. That marked a break from the style of Thomas Sydenham, the seventeenth-century physician nicknamed the English Hippocrates, who classified diseases by careful clinical observation. Giovanni Battista Morgagni pushed anatomical pathology forward in the eighteenth century, and Robert Koch's laboratory work raised the status of investigations in the nineteenth. Early twentieth-century Americans who trained in Germany brought the discipline home and borrowed its name. Its deeper roots reach ancient India and China; the Ayurvedic anthologies of Charaka hold the earliest texts.
The distinctive skill is handling tangles. Internists are trained for undifferentiated complaints like chest pain, breathlessness or altered consciousness, for acute illness affecting several organs at once, and for patients juggling multiple chronic conditions. Many subspecialise, yet generalists are not lesser experts; their expertise is complexity itself. Unlike general practitioners, their training centres only on adults and typically leaves out surgery, obstetrics and paediatrics.
Routes into the field vary by country. In the United States, four years of medical school often follow four of pre-medical study, so basic training can take around eight years, then comes a period of supervised practice before full registration. Residency in internal medicine usually lasts three years in most countries and focuses on hospital-level care. Commonwealth trainees spend around four years as senior house officers before becoming registrars. A newer branch, acute internal medicine, emerged in the 1990s as emergency admissions climbed and hospital beds grew scarce.
Source: Internal medicine
