Dr. Marshall is a member of the American Academy of Child and Adolescent Psychiatry.

Dr. Marshall received her B.A. and M.S.W. in social work from The Catholic University of America, and earned her M.D. from Cornell University Medical College. She completed her residency training in psychiatry at New York Hospital, Payne Whitney Clinic and a fellowship in child and adolescent psychiatry at New York Presbyterian Hospital and RCPC.