Dr. Donnan earned his medical degree from Emory University School of Medicine and completed his residency in internal medicine at Kaiser Foundation Hospital in San Francisco, California. He is board certified in internal medicine.
Prior to joining Piedmont Physicians Group, Dr. Donnan was in private practice at Albany Internal Medicine in Albany, Georgia. He has served on the clinical faculty for several medical degree programs and is currently a member of the clinical faculty at Medical College of Georgia. Dr. Donnan is a fellow of the American College of Physicians and is a member of the Medical Association of Georgia.