Omnipod Horizon™ Automated Glucose Control System Preschool Cohort

The study schedule will consist of a standard therapy data collection phase followed by a hybrid closed-loop phase. Subjects will undergo a 14-day outpatient, standard therapy phase during which sensor and insulin data will be collected. Subjects, or their caregivers, will manage their diabetes at home per their usual routine using the study continuous glucose monitoring system (CGM) and remain on current multiple daily injections (MDI) or pump therapy. This will be followed by a 94-day (13-week) hybrid closed-loop phase, conducted in an outpatient setting where subjects, or their caregivers, will manage their diabetes at home using the Omnipod Horizon™ Automated Glucose Control System. After completing the 94-day hybrid closed-loop phase, subjects will have the option to continue using the system for an additional 12 months. During the hybrid closed-loop phase, a subset of subjects will participate in 2-days of supervised meal and exercise challenges. The hybrid closed-loop phase will begin on Study Day 1.