What was the name of the fictional medical department led by Gregory House in House M.D.?

Gregory House led the fictional Diagnostic Medicine department in House M.D. The department specializes in difficult cases that have resisted ordinary diagnosis, allowing the series to build each episode around a medical puzzle.

House’s team commonly investigates rare diseases, conflicting symptoms, and unusual reactions to treatment. The department’s work is not portrayed as a standard first-stop clinic; instead, patients are referred when other doctors cannot explain what is happening.

The show sometimes presents House as a diagnostician rather than assigning him to one conventional specialty. That distinction matters because diagnostic medicine draws on many fields, including infectious disease, neurology, oncology, and immunology.

Viewers may confuse the department with Internal Medicine, the specialty House formally practiced earlier in his career. In the fictional hospital, however, the team’s distinctive unit is called Diagnostic Medicine, and its unusual remit is central to the show’s premise.