 AIM 1: PHASE 1: Use Multiphasic Optimization Strategy i.e., MOST, a highly efficient experimental strategy, to determine specific components for inclusion in an intervention to 1a improve primary clinical outcomes of A1C and percentage of time spent in hyperglycemia and 1b address secondary clinical outcomes by improving adherence and biological markers of complications in high-risk pediatric patients with T1D A1C9-12 as part of 12-month personalized behavioral intervention delivered via in-person T1D clinic visits and home telemedicine. 