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

Gregory House leads nephrology and infectious disease in House M.D. His official medical specialties explain why he is particularly suited to diagnosing systemic illnesses involving the kidneys, infections, or multiple organ systems.

House's department is called Diagnostic Medicine, but his personal specialties are nephrology and infectious disease. The show frequently presents him as an expert who combines those fields with broad knowledge of pathology, pharmacology, neurology, and other disciplines.

The distinction matters because diagnostic medicine is the department's function, not House's standard specialty label. His fellows come from varied backgrounds and contribute different forms of expertise to the team's differential diagnoses.

The series sometimes depicts House performing procedures or making decisions associated with other specialties. Those scenes show the character's unusually broad medical knowledge, but they do not change his stated specialty pairing.