This project provides mid-term bridge multi-center extension to four randomized trials comparing surgical and medical treatments in Type 2 Diabetes which includes the “Triabetes Study” (A Randomized Trial to Compare Surgical and Medical Treatments for Type 2 Diabetes). This study compares outcomes of 3 of the most common bariatric surgical procedures with a comprehensive medical treatment for Type 2 Diabetes in a large cohort of randomized patients (>300) with body mass index between 30 and 40.