What medical specialties does Gregory House hold board certification in?

Gregory House is board certified in infectious disease and nephrology. These specialties help explain why he leads a diagnostic medicine department focused on puzzling, multisystem illnesses rather than routine treatment.

Infectious disease concerns illnesses caused by bacteria, viruses, fungi, parasites, and other pathogens. Nephrology focuses on the kidneys and related disorders, including problems involving fluid balance, blood pressure, and waste removal. House’s cases often require knowledge from both areas as well as from many other medical fields.

The show sometimes presents House performing work outside these specialties, including procedures and diagnoses associated with neurology, cardiology, or surgery. That flexibility serves the drama, but it should not be mistaken for his formal specialties.

House’s expertise is also partly modeled on detective fiction: he gathers clues, rejects weak explanations, and looks for one diagnosis that accounts for the full pattern of symptoms.