In House M.D., what specialty does Gregory House lead as the hospital’s head physician?

In House M.D., Gregory House leads the hospital’s Department of Diagnostic Medicine.

The specialty is built around investigating illnesses that other physicians have been unable to identify. House’s team reviews symptoms, tests, medical histories, and possible disease mechanisms before proposing and testing competing diagnoses. This structure gives the series its central format: a difficult case is treated as a medical mystery.

Diagnostic medicine is sometimes confused with a conventional organ-based specialty such as cardiology or neurology. House does have strong expertise in infectious disease and nephrology, but his position at Princeton-Plainsboro is specifically connected to diagnostics. His medical background helps him recognize patterns across multiple specialties.

The department also changes over time as fellows join, leave, or return. Despite those personnel changes, House remains the distinctive leader of the diagnostic service for much of the series. The title is therefore a department specialty, not merely a description of House’s personality or investigative style.