adolescents with diabetes have a higher incidence of subclinical and clinical depression compared to healthy adolescents. Patients with diabetes who are clinically or subclinically depressed are at high risk for poor glycemic control. The purpose of this pilot study is to evaluate an established internet-based cognitive behavioral therapy intervention. This program was originally developed for pediatric patients in a primary care setting at risk for depression. our proposed project will study the effects of this intervention in adolescents with type 1 diabetes mellitus.