In House M.D., what nickname does Remy Hadley commonly use?

In House M.D., Remy Hadley commonly uses the nickname Thirteen.

Remy “Thirteen” Hadley is a physician who joins House’s diagnostic team during the fourth season. Olivia Wilde played the character, whose nickname comes from her numbered position in the selection process for House’s new fellows.

The number became the character’s enduring identifier even after the original hiring competition ended. Thirteen is notable for her medical skill, guarded personality, bisexuality, and diagnosis with Huntington’s disease, which becomes a major part of her storyline.

The character’s full name is Remy Hadley, and “Thirteen” is not her surname. Amber Volakis, Lisa Cuddy, and Lawrence Kutner are separate House M.D. characters. This makes the nickname a particularly recognizable answer when the question specifies Remy Hadley.