In House M.D., what is the name of House's close friend and oncologist?

James Wilson is House's close friend and the hospital's oncologist in House M.D.

Wilson is portrayed by Robert Sean Leonard and serves as one of House's few enduring personal connections. His medical specialty, oncology, places him in frequent contact with patients facing life-threatening illness, contrasting with House's diagnostic focus.

The character often acts as House's conscience, although Wilson also has complicated motives and personal flaws. Their friendship survives arguments, professional conflicts, and House's reckless behavior, making it one of the show's central relationships.

Wilson's surname is sometimes confused with that of other doctors in medical dramas. In House M.D., “Wilson” specifically refers to James Wilson, while Robert Sean Leonard is the actor who portrays him.