Daryl Callahan

Daryl J. Callahan, D.O., M.S.S. Colonel (retired), Medical CorpsDr. Callahan received his medical degree from the Kansas City University – College of Osteopathic Medicine. His postgraduate education was at Lakeside Hospital in Kansas City. He was in private rural practice for 10 years and maintained standing as clinical faculty at KCU in the family medicine department. During this tenure, he completed a two-year faculty research fellowship at KCU. Dr. Callahan served 30 years in the Army National Guard, achieving the rank of Colonel, and was appointed State Surgeon for Kansas and later as Special Assistant to Northern Command/NORAD in Colorado Springs for 3 years. He is a graduate of the United States Army War College. Dr. Callahan is actively involved in many military medical organizations, for which he was given the Order of Military Medical Merit. He served three tours in Iraq and deployed to state disaster responses, including New Orleans during Hurricane Katrina and Hurricane Rita. Dr. Callahan left private practice after 9/11 and joined the Federal Civil Service as a primary care physician at Fort Riley in Kansas and later at the VA Medical Center in Topeka. His civil service culminated in the position of Service Chief for Montana VA. After retiring from military service, he was a Blue Cross Blue Shield Medical Director for several years. During the COVID-19 pandemic, he practiced as a telemedicine physician to improve access to acute care. Since 2022, he has served as an adjunct professor at the Kansas College of Osteopathic Medicine. Dr. Callahan has authored a book on A.T. Still, which is forthcoming from McFarland Publishing, Inc. Further information regarding A.T. Still can be found at www.atstilldo.com.