What is the name of Gregory House’s medical specialty in House M.D.?

Gregory House specializes in diagnostic medicine in House M.D.

House leads the Department of Diagnostic Medicine at Princeton-Plainsboro Teaching Hospital. His team investigates rare or complicated illnesses, especially cases that have resisted ordinary diagnosis by other departments.

Diagnostic medicine in the show functions as a cross-specialty discipline. House and his colleagues draw on fields such as infectious disease, neurology, immunology, and surgery when symptoms do not fit a straightforward explanation.

The specialty is sometimes confused with a single organ-based field such as neurology or cardiology. House is a licensed physician with training in infectious disease and nephrology, but his position and the show’s central premise focus on diagnosis across specialties.