Dr. McCall received his MD from the Medical College of Wisconsin and his PhD in Neural & Endocrine Regulation from the Massachusetts Institute of Technology. His clinical training was at the Boston University Medical Center where he did his residency in Internal Medicine, his Endocrinology fellowship and was Chief Medical Resident. At the University of Virginia he was the James M. Moss Professor of Diabetes in Internal Medicine (2001-2017), the Director of the Diabetes Clinical Services at UVA Health System, and the Medical Director of the Virginia Center for Diabetes Professional Education and the Director of the Inpatient Glucose Management Program. He was Vice-President for Clinical Science for the Endocrine Society 2015 to 2018. His research early focused on how diabetes and hypoglycemia affect the central nervous system. He worked with UVA colleagues on computer controlled insulin infusions for insulin pumps as an “artificial pancreas” therapy for type 1 diabetes at the Center for Diabetes Technology. For studies on hypoglycemia defenses, he worked with Dr. Leon Farhy on pancreatic network control of glucagon counter-regulation. He has had NIH funding for basic scientific work on understanding and reversing defective glucagon counterregulation in type 1 diabetes, for computer algorithms for glycemic control of inpatients undergoing cardiovascular surgery. He also has NIH funding with Dr. Daniel Cox for studies of use of monitoring and counseling on diet and exercise for glycemic control and with Dr. Jennifer Lobo for disparities for diabetes complications screening in rural areas, and with Dr. Sue Brown for examining immunity related abnormalities of Glucagon, amylin and zonulin in first degree relatives of those with type 1 diabetes. His clinical work has focused on diabetes complications and their prevention. He has published on disparities in prevention of complications of diabetes in rural areas. He established a Diabetes Cardiovascular Clinic program in 2002 with Cardiology and more recently Hepatology, which continues to deliver collaborative care for patients with diabetes and cardiometabolic risk. He currently works both at UVA in the Endocrine Division and at Cornell University as a Professor of Nutritional Sciences.