What medical specialty does House M.D. portray Gregory House as leading?

Gregory House leads the Diagnostic Medicine department in House M.D.

Diagnostic medicine focuses on identifying the cause of difficult or unexplained illness, often by combining patient history, examinations, laboratory tests, and imaging. In the series, House’s team accepts cases that other doctors have failed to diagnose.

The show often depicts House personally performing procedures and directing treatment, but his defining professional role is diagnostician. His expertise is not the same as a single organ-based specialty such as cardiology or neurology.

House’s department is fictionalized for dramatic storytelling. Real hospitals may organize complex diagnostic work across internal medicine, subspecialty consultations, and multidisciplinary teams rather than using an identical department structure.