Stephanie Marcy, PhD

Attending Physician
Clinical Associate Professor of Pediatrics (Clinician Educator), Keck School of Medicine of USC

Stephanie Marcy received her Ph.D. in clinical psychology from Boston University in 1998, where she received extensive training in clinical intervention and assessment with children, adolescents, and adults with mild to severe psychopathology. Upon finishing her degree, she moved back to Los Angeles to pursue a two-year post-doctoral fellowship at Children’s Hospital Los Angeles, with a strong emphasis on trauma work – mostly sexual abuse of young children. After completing the fellowship, she joined the faculty at CHLA, and a couple of years later, the faculty of USC Keck School of Medicine, where she has been since. Currently she works within the General Pediatrics Division and the University Center for Excellence in Developmental Disabilities (UCEDD), and is a member of the Developmental Behavioral Pediatrics faculty. Dr. Marcy provides individual and family therapy for children with a multitude of presenting clinical and developmental conditions, many with comorbid medical conditions. She also has expertise in psychological assessment, providing in depth psychodiagnostic evaluations to determine presence of developmental, learning, cognitive, and neurological disabilities, including ADHD, to facilitate diagnostic clarification and determine appropriate social, therapeutic, and educational interventions. Dr. Marcy is highly involved in teaching, mentoring, and supervising medical residents and fellows, and pre- and post-doctoral psychology trainees, in the area of intervention, assessment, child development and doctor-patient communication skills.


Medical School

Boston University - Psychology


Children’s Hospital Los Angeles



Licensed Psychologist

Professional Memberships

American Psychological Association


Korsch, B M, & Marcy, S N (2000), 'Pediatric Compliance from a Patient and Family Perspective,' in D. Drotar (ed.) Promoting Adherence to Medical Treatment in Childhood Chronic Illness: Concepts, Methods, and Interventions, 57-65. Mahwah N.J.: Lawrence Erlbaum Associates

Watson, J. S., Umansky, R., Marcy, S., & Repacholi, B. (1998). Handclasping and instrumental reaching in a case of Rett Syndrome: Three forms of behavioral competition. Journal of Applied Behavioral Development

(In process) Types of Childhood Maltreatment And Negative Sequelae In Young Adults: Differential Outcomes Of Psychological, Physical, And Sexual Maltreatment


Dr. Marcy is currently the PI on a study looking at the developmental and behavioral phenotype associated with a rare genetic disorder, 7q11.23 microduplication Syndrome. She also served as psychological consultant to the Centers for Disease Control and Prevention on their study examining potential long term effects of infant Thimerisol exposure.