ObjectivesTo examine disparities in mental health diagnosis, depression screening, and depressive symptoms in pediatric primary care settings before and during the COVID-19 pandemic, and to evaluate the use of electronic health records to study temporal trends in pediatric mental and behavioral health (MBH).MethodsThis is an IRB-approved, retrospective study of pediatric patients (n=10,866) who visited three primary care sites at an academic medical center before (2017-2019) and during (2020-2022) the COVID-19 pandemic. We used logistic regression to compare rates of diagnoses, depression screening, and depression symptom scores among demographic groups.ResultsThis study demonstrates an increase in both PHQ-9A screening rates and average scores from 2017-2019 to 2020-2022. There were significant disparities in common mental health diagnoses, including higher rates of psychological distress among lower income and Hispanic patients, both before and during the pandemic, despite lower rates of screening among Hispanic patients. This suggests a need for improved equity in routine MBH screening and additional research to better understand the underlying social determinants that may be driving the greater mental health burden for certain marginalized youth.This study also highlights the strengths and challenges of utilizing EHR data to characterize disparities in pediatric mental illness. Although the nature of care delivery in an academic medical center clinic and the limitations of the EHR for collecting relevant data present challenges to this measurement, the EHR is nevertheless a promising tool for measuring and tracking pediatric mental health disparities.