What specialty does House’s hospital department focus on in House?

House’s hospital department focuses on diagnostic medicine. The Department of Diagnostic Medicine investigates complex cases that have resisted ordinary diagnosis, bringing together evidence from symptoms, tests, imaging, and specialist consultations.

The department is unusual in the show because House’s team is portrayed as a dedicated group of diagnosticians rather than as a conventional ward service. House commonly begins with a differential diagnosis, listing possible diseases and then eliminating them as new evidence appears. The process resembles detective work and forms the structural core of many episodes.

House’s fellows and employees change over the course of the series. Early team members include Eric Foreman, Allison Cameron, and Robert Chase. Later teams include physicians such as Chris Taub, Lawrence Kutner, and Remy Hadley, known as Thirteen.

Real hospitals may organize diagnostic services differently, and “diagnostic medicine” is not always a standalone department. In House, however, it is the explicit name and function of the fictional hospital unit led by Gregory House.