What medical specialty does House’s colleague Lisa Cuddy practice?

Lisa Cuddy’s medical specialty in House M.D. is endocrinology.

Cuddy is the hospital administrator and dean of medicine at Princeton-Plainsboro for much of the series. She is also a physician trained in endocrinology, the branch of medicine concerned with hormones, glands, and related metabolic processes.

Her administrative role frequently puts her in conflict with Gregory House. Cuddy values the hospital’s budget, rules, and legal responsibilities, while House often breaks regulations to pursue a diagnosis. Their arguments form a major part of the show, but Cuddy also recognizes House’s exceptional medical ability and repeatedly protects his diagnostic department.

Lisa Edelstein played Cuddy. Because Cuddy is more often shown managing the hospital than treating endocrine patients, viewers may remember her administrative title more readily than her specialty. Endocrinology is therefore the specific medical answer, not hospital administration or diagnostic medicine.