What fictional diagnostic department does Dr. Gregory House lead in House M.D.?

Dr. Gregory House leads the fictional Department of Diagnostic Medicine in House M.D.

The department is designed around difficult cases that have resisted ordinary diagnosis. House and his fellows review symptoms, medical histories, test results, and possible causes before proposing increasingly unusual explanations. This structure supplies the central mystery format of the series.

The department is distinct from a conventional specialty such as cardiology or neurology. House is a licensed physician with expertise in infectious disease and nephrology, but the show's diagnostic team is organized around solving unsolved cases rather than treating one organ system.

The department's location and staffing change over the series. House supervises several different teams, including doctors such as Eric Foreman, Robert Chase, and Allison Cameron. Their disagreements are part of the method: House expects competing hypotheses and uses tests to eliminate possibilities.