This issue of Medical Clinics of North America, edited by Dr. Irl Hirsch, is devoted to Diabetes Management. Articles in this issue include: Diabetes Classification Update; Internet Diabetes Management: An Effective, Efficient, and Cost Effective Approach; Monitoring Glycemia in Diabetes; Glycemic Targets: What is the Evidence?; Lifestyle Modification in Diabetes; Metformin, Sufonlyureas, Acarbose, Thiazolidnediones, Bromocriptine, and Colesevalam; Incretins; SGLT-2 inhibitors; Insulin therapy in Type 1 Diabetes; Insulin Therapy in Type 2 Diabetes; Non-Glycemic Targets for Patients with Diabetes; Screening and Treatment for the Primary Care Provider of Common Diabetes Complications; and Polycystic Ovarian Syndrome.