OBJECTIVE: Young adults (YAs) with type 1 diabetes (T1D) often struggle to achieve glycemic control and maintain routine clinic visits. We aimed to evaluate the societal costeffectiveness of the Colorado YAs with T1D (CoYoT1) Clinic, an innovative care model of shared medical appointments through home telehealth. RESEARCH DESIGN AND METHODS: Patients self-selected into the CoYoT1 (N=42) or usual care (N=39) groups. RESULTS: Within the trial, we found no significant differences in 9-month quality-adjusted life; however, the control group had a larger decline from baseline in utility than the CoYoT1 group, indicating a quality of life (QoL) benefit of the intervention(difference in difference mean ± SD: +0.04 ± 0.09, P=0.03). There was no significant difference in total costs. The CoYoT1 group had more study-related visits but fewer non-study office visits and hospitalizations. CONCLUSIONS: The CoYoT1 care model may help YAs with T1D maintain a higher QoL with no increase in costs.