Approximately 300 participants will be enrolled for this study. Participants will be randomly assigned to use either the EHR portal alone, or the EHR portal plus a Care Manager. For those assigned to the EHR portal plus Care Manager, the Care Manager will meet with families at the beginning of the study to confirm their treatment preferences and goals, provide additional education on ADHD treatment, and distribute handouts on common concerns among ADHD patients and families. The Care Manager will contact families weekly to every 3 months by phone, email, or in-person as needed to assess treatment use, identify new concerns, and assist families with problem-solving. Using the portal or other means, the Care Manager will also communicate with pediatric clinicians, mental health providers, and teachers to clarify family treatment preferences and goals and address emerging treatment issues. Participants will complete surveys that will assess ADHD symptoms, goal attainment, patient-reported outcomes, patient and family engagement and treatment initiation and adherence.