What medical specialty does Gregory House lead in the television series House, M.D.?

Gregory House leads the Department of Diagnostic Medicine in House, M.D.

Diagnostic medicine focuses on identifying the cause of symptoms when a patient’s illness is unclear, complex, or resistant to ordinary treatment. In the series, House and his team gather clues, test competing explanations, and repeatedly revise their differential diagnosis as new evidence appears.

The department is a dramatic device as well as a medical specialty. Most hospital doctors refer difficult cases to House because his team can connect symptoms across different organ systems. The show compresses or dramatizes real clinical processes, and some of its treatments and diagnostic leaps are intentionally heightened for television.

House is sometimes described simply as an internist or diagnostician. He is a board-certified infectious disease specialist and nephrologist in the show’s backstory, but his hospital role is head of diagnostic medicine. That distinction makes “diagnostic medicine” the specific answer for his department.