In House M.D., the doctor known as Thirteen has the surname Hadley.
Remy Hadley is a neurologist who joins House’s diagnostic team during the fourth season. She is commonly called “Thirteen,” a nickname connected to her position in the selection process House uses when rebuilding his team after his original fellows depart.
Hadley’s story includes a confirmed diagnosis of Huntington’s disease, an inherited neurodegenerative disorder. The diagnosis affects her relationships, medical decisions, and views about future illness. The show uses her storyline to explore genetic risk, uncertainty, and personal autonomy.
The character is played by Olivia Wilde. Her surname is often overlooked because the nickname is used much more frequently in dialogue. “Thirteen” is not her first name or medical specialty; it is the enduring nickname attached to Remy Hadley during her time on House’s team.