In House M.D., what is the name of Gregory House’s department?

Gregory House leads the diagnostic medicine department in House M.D.

The department investigates patients whose illnesses remain unexplained after routine evaluation or treatment. House and his team combine medical history, laboratory work, imaging, biopsies, and other tests to identify unusual causes. This structure gives the series its signature mystery format and allows one case to drive each episode.

Diagnostic medicine is not presented as a typical large hospital department. At Princeton-Plainsboro, House’s unit is small and highly specialized, and its members often have backgrounds in other fields such as neurology, immunology, or intensive care. The team’s composition changes repeatedly during the series.

The department is sometimes called “diagnostics” in dialogue, but diagnostic medicine is the canonical name associated with House’s unit. It should not be confused with internal medicine, even though House is a physician trained in that broader area and his cases often involve multiple organ systems.