Dr. Elissa Weitzman, ScD, MSc, is an Associate Professor of Pediatrics at Harvard Medical School (HMS) and Adolescent/Young Adult Medicine at Boston Children’s Hospital (BCH), where she is faculty in the BCH Computational Health Informatics Program (CHIP) and the Population and Development Studies Center at the Harvard TH Chan School of Public Health. An internationally recognized social-behavioral scientist, she has expertise in the epidemiology of adolescent substance use, behavioral and psychosocial factors related to improving disease and treatment experiences for adolescents living with chronic illness, use and evaluation of digital health and patient-facing health information technologies.  A mixed-methods scientist, she leads large multisite studies that combine patient-centered qualitative interviewing, longitudinal cohort, survey, and experimental methods.  She has advanced training in medical ethics important to evaluating acceptability and equipoise of novel therapies and policy interventions to ameliorate health issues in pediatric populations. She has published extensively about adolescent substance use and pediatric onset chronic illness, and pioneered approaches to advancing evidence and care using health communications, participatory health research, digital health and social media tools.