Which character in House M.D. is a specialist in oncology?

James Wilson is the oncology specialist in House M.D.

Wilson, played by Robert Sean Leonard, is a physician who treats cancer patients and serves as Gregory House’s closest friend. His specialty places him in a different medical role from House, whose department focuses on diagnosing unusual and unexplained conditions.

Wilson’s medical expertise is important to the series because oncology often involves difficult prognoses, ethical decisions, and conversations about quality of life. His calmer bedside manner also contrasts with House’s blunt approach to patients and colleagues.

The character is sometimes mistaken for one of House’s diagnostic fellows because Wilson frequently participates in the main story. However, he is not one of House’s original team members. Eric Foreman is a neurologist, Robert Chase is an intensivist and surgeon, and House is the department’s diagnostician.