What specialty does Gregory House primarily lead in House, M.D.?

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

House and his rotating teams investigate patients whose symptoms do not fit ordinary diagnoses. Their work often involves combining clues from several medical specialties, reviewing test results, and challenging assumptions made by other departments.

The character is also described as board-certified in infectious disease and nephrology. Those specialties help explain his expertise, but they are not the name of the hospital department he directs. This distinction is a common source of confusion when describing his medical role.

The department’s cases are fictional and dramatized for television. The show uses unusual diseases and high-stakes decisions to create mystery plots, while House’s diagnostic approach is presented as a medical analogue to detective work.