IMPORTANCEPublic health measures to reduce the spread of COVID-19 have heightened distress among children and adolescents and contributed to a shift in delivery of mental health care services.OBJECTIVES To measure and compare physician-based outpatient mental health care utilization before and during the COVID-19 pandemic and quantify the extent of uptake of virtual care delivery. DESIGN, SETTING, AND PARTICIPANTSPopulation-based repeated cross-sectional study using linked health and administrative databases in Ontario, Canada. All individuals aged 3 to 17

The study's objective was to identify systemic facilitators and barriers of transferring young adults (ages 17-21) with eating disorders from pediatric to adult health and mental health services. Qualitative interviews were conducted and three themes emerged: (a) difficulties navigating care during the transfer period; (b) challenges achieving and maintaining recovery due to systemic barriers after the transfer of care;and (c) recommendations for facilitating the transfer between systems of care. From the perspective of young adults with eating disorders our study shows that the transition to adult care services may be improved with increased coordination, communication, and collaborative partnerships between pediatric and adult providers.