[Concord Office] Dr. Dreffer received a Bachelor of Arts degree from Williams College in Williamstown, MA, and his Doctor of Medicine degree from The Ohio State University College of Medicine in Columbus, Ohio. He has been a Family Practice provider since 1997 and was the medical director and then program director for the NH Dartmouth Family Medicine Residency Program at Concord Hospital for more than 10 years. Dr. Dreffer is accepting new patients in our Concord office.