In House M.D., what is James Wilson’s medical specialty?

James Wilson’s medical specialty in House M.D. is oncology. Wilson treats patients with cancer and serves as the head of the hospital’s oncology department.

His specialty creates an important contrast with House’s diagnostic medicine. Oncology often involves long-term treatment, difficult prognoses, and sustained relationships with patients, while House’s team usually focuses on identifying a rare cause of an unexplained illness. Wilson’s empathy and willingness to support patients are central parts of his characterization.

Wilson is played by Robert Sean Leonard. He is House’s closest friend and one of the few people willing to confront House without abandoning him. The character’s professional expertise is sometimes overlooked because the series spends more time on House’s diagnostic cases than on Wilson’s cancer treatments.

Oncology should not be confused with hematology, although the two fields can overlap in real medical practice and are sometimes organized together in hospitals. In the show, Wilson is specifically identified as an oncologist.