What medical specialties does Gregory House have in House M.D.?

Gregory House’s medical specialties in House M.D. are infectious disease and nephrology.

House leads the hospital’s Department of Diagnostic Medicine, but his formal specialist background is in infectious disease and nephrology. Infectious disease concerns illnesses caused by pathogens such as bacteria, viruses, fungi, and parasites. Nephrology focuses on the kidneys, their diseases, and related effects on the body.

His diagnostic work regularly crosses those boundaries. House and his team investigate problems involving multiple organs, unusual immune responses, toxins, and rare infections, often consulting specialists when a case requires surgery or another field. The show’s cases are fictionalized for drama, so its diagnostic methods should not be treated as clinical guidance.

The character’s specialty is sometimes reduced to “diagnostics,” which describes his hospital department and role rather than his original board specialties. House’s reputation comes from synthesizing clues across medical disciplines, not from being formally trained in every specialty represented on the show.