Which medical specialty is Dr. House primarily associated with in House M.D.?

Dr. House is primarily associated with diagnostic medicine in House M.D.

House leads the hospital’s Department of Diagnostic Medicine, a fictional specialty department that investigates difficult cases other physicians have been unable to solve. His team gathers histories, orders tests, challenges assumptions, and repeatedly revises possible diagnoses as new symptoms appear. This structure gives the series its central medical-mystery format.

House is also described as a specialist in infectious disease and nephrology, and those qualifications explain why he has particular expertise with infections, kidney disorders, and complex systemic illnesses. However, diagnostic medicine is the department and professional role most directly associated with him in the show. It should not be confused with emergency medicine, surgery, or general practice, which are separate medical fields.