What is House M.D.’s main character’s medical specialty?

House M.D.’s main character, Dr. Gregory House, specializes in diagnostic medicine. He leads a team that investigates rare or unexplained illnesses after routine medical approaches have failed.

Diagnostic medicine in the series is portrayed as a collaborative process. House’s fellows gather histories, perform examinations, order tests, and propose possible causes. House then challenges their assumptions and narrows the possibilities, often using an unusual clue to identify the disease.

The show’s fictional Diagnostic Medicine department is not presented like a conventional primary-care clinic. Its patients usually arrive with complex, multisystem symptoms that require input from several specialties. House himself is also a board-certified infectious disease specialist and nephrologist, but his role at Princeton-Plainsboro is leading diagnosis.

This distinction explains why answers such as cardiology or neurosurgery are incorrect even when individual episodes involve those organs or procedures. The department’s defining task is solving difficult cases, not treating one particular body system.