Dr. Blumenthal is President of the American College of Preventive Medicine. He served as a VISTA Volunteer physician in County, Arkansas; as an Epidemic Intelligence Service Officer with the Centers for Disease Control in Atlanta; as a medical epidemiologist with the World Health Organization Smallpox Eradication Program in India and Somalia; and on the faculty of the Emory University School of Medicine. He joined the faculty of the Morehouse School of Medicine in 1980, where he served as Founding Chair of the Department of Community Health and Preventive Medicine from 1984–2009. He served as Associate Dean for Community Health until his retirement in July, 2014.
He has served as President of the Association of Teachers of Preventive Medicine, as a Regent of the American College of Preventive Medicine, as a member of the Governing Council of the American Public Health Association, as Fulton County (Atlanta) Health Officer, and as a Robert Petersdorf Scholar-in-Residence at the Association of American Medical Colleges
Dr. Blumenthal is the author or co-author of approximately 100 peer-reviewed journal articles, commentaries, reviews, and book chapters, and the editor or co-editor of four books. He is a graduate of Oberlin College and the University of Chicago School of Medicine. He completed his residency in pediatrics at Charity Hospital of New Orleans (Tulane Division) and received his master of public health degree from Emory University. He is board-certified in both pediatrics and preventive medicine.