Dr. Nancy Keuthen is a graduate of Brown University and the clinical psychology program at Stony Brook University. She completed her internship at the Brockton-West Roxbury Veterans Administration Medical Center. Since 1986 she has been on staff at Massachusetts General Hospital and faculty at Harvard Medical School. Since 2001 she has been associate professor of psychology (psychiatry) at Harvard Medical School. She is the former director of the Cognitive Behavioral Therapy Program at Massachusetts General Hospital.

Dr. Keuthen has been chair, vice-chair and member of the scientific advisory board of the Trichotillomania Learning Center and member of the scientific advisory board of the International Obsessive-Compulsive Disorder Foundation. She has been guest editor for several scientific journals. She is a founding member of the International Trichotillomania Research Consortium.

Dr. Keuthen has made important contributions to the diagnosis, etiology and treatment of obsessive-compulsive disorder as well as the related disorders of trichotillomania, pathological skin picking and body dysmorphic disorder. Her bibliography lists nearly 100 peer-reviewed publications in this field in addition to a book, numerous chapters, educational materials and Internet-based self-help materials.