Dr. Green is an Associate Professor of Medicine and Chief of the Division of Hepatology at the Northwestern University Feinberg School of Medicine. He graduated with an undergraduate degree from Duke University and subsequently graduated from the Duke University Medical School with a degree in Medicine. He undertook his Internal Medicine training at Northwestern University where he also served as the Chief Medical Resident. His Gastroenterology and Hepatology Fellowship training was at Brigham and Women's Hospital at Harvard Medical School, Boston, MA. He subsequently served as an Instructor of Medicine at Brigham and Women's Hospital and Harvard Medical School and as an Assistant Professor of Medicine at the University of Illinois in Chicago.

Since 1999, he has been an Associate Professor of Medicine at Northwestern University. Since 2002, he has been the Chief of the Division of Hepatology at Northwestern University.
Dr. Green has been actively involved in clinical and basic investigations of cholestatic liver disease, metabolic liver diseases and fatty liver disorders. His current research efforts focus on the genetics and molecular mechanisms of cholestatic and fatty liver disorders.

He is Chair of the Cholestatic Liver Disorders Special Interest Group (SIG) of the American Association for the Study of Liver Diseases (AASLD); and is the former Chair of the Liver-Biliary Council of the American Gastroenterological Association. He also served as an Associate Editor for the journal Hepatology from 2001-2006. He has authored over 50 original articles, book chapters and reviews on a wide range of hepatic disorders.