What specialty did Dr. Gregory House lead at Princeton-Plainsboro in House M.D.?

Dr. Gregory House led the Diagnostic Medicine department at Princeton-Plainsboro in House M.D.

The department investigates difficult cases that other doctors have been unable to explain. House's team combines symptoms, laboratory results, imaging, patient history, and unusual possibilities to identify the underlying disease, making diagnostic reasoning the show's defining medical activity.

House is also described as a specialist in infectious disease and nephrology. Those specialties explain his medical expertise, but they are not the name of the department he leads. This distinction is a frequent source of confusion because episodes often involve infections, kidney disorders, or both.

The fictional department is dramatized as an unusually flexible unit, able to pursue rare diagnoses across many fields. In real hospitals, diagnostic medicine may be organized differently, and complex cases are often handled through consultations among multiple specialties rather than by one House-like department.