Loyal Tillotson, MD, PhD

Loyal Tillotson, MD, PhD


I am a native of northeastern Ohio. I received a BA degree in chemistry from Ohio Northern University before earning combined MD and Ph.D. degrees from Harvard Medical School. My graduate and postgraduate research centered on the cellular and molecular biology of colon cancer. My postgraduate clinical training included an internal medicine residency at Duke University Medical Center and a fellowship in gastroenterology at the Massachusetts General Hospital in Boston. Subsequently, I have had faculty appointments at Harvard Medical School and the University of North Carolina at Chapel Hill.

I am certified as a Diplomat in both internal medicine and gastroenterology by the American Board of Internal Medicine. I am a member of the Christian Medical and Dental Association and a trustee of John Witherspoon College. I am married and have two children. My favorite pastime is working with horses.

Contact Info

Primary location: 
Rapid City Medical Center 2820 Mt. Rushmore Road Rapid City SD 57701
Board Status: 
American Board of Gastroenterology