In House M.D., what fictional medical specialty does House’s department investigate?

In House M.D., House’s department investigates cases in diagnostic medicine.

Diagnostic medicine focuses on identifying diseases and conditions, especially when symptoms are unusual, contradictory, or difficult to explain. In the series, House leads a small team that accepts patients other departments have failed to diagnose and works through competing medical hypotheses.

The show dramatizes diagnosis as a process of observation, testing, differential diagnosis, and revision. House’s team frequently performs procedures, consults specialists, and uses laboratory or imaging results to eliminate possibilities. The department’s cases are fictional, but many episodes draw on real medical syndromes and diagnostic principles.

The phrase is sometimes confused with “internal medicine,” because House is described as a diagnostician and has a background in nephrology and infectious disease. However, the department he leads at Princeton-Plainsboro is Diagnostic Medicine, the specialty label used for the show’s central investigative team.