In House M.D., what is the name of Dr. House's fictional diagnostic department?

In House M.D., Dr. House's fictional department is the Department of Diagnostic Medicine.

The department is presented as a small specialist unit responsible for solving baffling cases at Princeton-Plainsboro Teaching Hospital. House leads the team and directs a process that often includes broad differential diagnoses, targeted tests, consultations, and sudden changes in treatment.

Its unusual status is part of the show's premise. Most hospitals divide medical work among established specialties, but the series gives House a dedicated service for patients whose problems do not fit neatly into one category. That setup allows the writers to bring together clues from multiple branches of medicine.

The team changes over the course of the series, but the department remains the professional home of House's central investigative work. It is commonly called the diagnostic team, while its formal fictional name is Department of Diagnostic Medicine.