Physician Photo

Daniel M. Horn, MD

  • Phone: 617-726-2374
Primary Care
Department of Medicine
Clinical Interests
Primary Care Internal Medicine
Chronic disease management
Boston: Massachusetts General Hospital
Medical Education
MD, SUNY Downstate College of Medicine
Residency, Brigham and Women's Hospital
Board Certifications
Internal Medicine, American Board of Internal Medicine
Foreign Languages
Patient Age Group
Accepting New Patients
Accepting New Patients: Call for Availability


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

Internal Medicine Associates Team 1
15 Parkman Street
Boston, MA 02114-3117

Phone: 617-726-2374
Fax: 617-726-4495