In House M.D., what is the name of Dr. House’s best friend and oncologist?

Dr. James Wilson is Dr. House’s best friend and the hospital’s oncologist in House M.D.

Wilson is played by Robert Sean Leonard and serves as House’s closest personal confidant. Although the two doctors often argue, Wilson repeatedly provides emotional perspective and challenges House’s assumptions about patients, colleagues, and relationships.

Wilson’s specialty is oncology, the branch of medicine concerned with cancer. His work gives him a different perspective from House’s diagnostic practice: Wilson often focuses on patient communication and care during serious illness, while House concentrates on identifying the underlying disease.

The character is also part of the show’s Sherlock Holmes pattern. Wilson’s surname echoes Dr. John Watson, Holmes’s companion, while House’s name and deductive style echo Holmes. Wilson’s loyalty is tested repeatedly, but their friendship remains central to the series.