Remy Hadley is the doctor nicknamed “Thirteen” in House M.D. The nickname comes from the number assigned to her during the competition for a position on Gregory House’s diagnostic team.
Olivia Wilde portrayed Hadley, who joins the show’s main medical ensemble during the fourth season. The character is a skilled physician whose personal history includes Huntington’s disease in her family and a deeply private approach to her own health risks. House gradually learns more about her through medical cases and team conflicts.
“Thirteen” is not Hadley’s surname or a medical specialty. Her full name is Remy Beaumont Hadley, although the show commonly uses the nickname. The character’s number remains the name most viewers use because House favors memorable labels and because the competition initially makes the doctors’ identities deliberately secondary.
Hadley’s story also includes her relationship with Eric Foreman. The character appears through several later seasons, making her one of the show’s most enduring members after the original diagnostic team changed.