What was the fictional diagnosis-related department called where House worked in House M.D.?

House worked in the Department of Diagnostic Medicine at Princeton-Plainsboro Teaching Hospital.

The department is the show’s fictional hub for patients whose illnesses remain unexplained after ordinary consultation and testing. House supervises a small team of doctors who generate differential diagnoses, order investigations, and revise their theories as new symptoms appear. This recurring process drives the medical mystery structure of the series.

The department should not be confused with House’s personal medical specialty. House is identified as a nephrologist and an infectious disease specialist, but his institutional job is to lead Diagnostic Medicine. The distinction matters because the department draws on multiple fields, allowing the team to combine neurology, immunology, oncology, surgery, and other expertise.

Real hospitals commonly use multidisciplinary diagnostic services, but the exact department shown in House M.D. is fictionalized for television. The show’s repeated use of the department name made it one of the clearest pieces of Princeton-Plainsboro’s invented organizational structure.