Daniel M. Horn, MD is the Assistant Medical Director for AmbulatoryQuality at the Massachusetts General Physician Organization, where he leadsefforts to improve the quality of care for 160,000 patients across 21 primarycare practices. Dr. Horn is also a primary care physician and Unit Chief atInternal Medicine Associates, where he provides comprehensive primary care andhelps with day to day leadership of the largest primary care practices at Mass General. Dr. Horn is board certified in Internal Medicine and is aninstructor at Harvard Medical School. He graduated Columbia University with aB.A. in Religion, and received his M.D. degree at SUNY Downstate College ofMedicine. He completed his residency in primary care and population medicine ata joint program between Brigham and Women?s Hospital, Harvard Vanguard MedicalAssociates, and the Department of Population Medicine at Harvard MedicalSchool. Dr. Horn is trained in various process improvement methodologies and iscertified as an Improvement Advisor by the Institute for Healthcare Improvement.