Dr. McKenna graduated from the University of Montana, Missoula with a degree in Microbiology. His Doctor of Medicine was awarded with Honors from the University of Texas, Medical Branch at Galveston. He completed his internship and residency in Internal Medicine in the US Air Force at Keesler Medical Center, MS, and his fellowship in Endocrinology, Diabetes, and Metabolism at Wilford Hall Medical Center in San Antonio, TX.
From 1997 - 2012, Dr. McKenna served in the US Air Force as an Endocrinologist with assignments in Illinois and Germany before retiring in 2012 from Travis AFB, CA.
Since 2012, Dr McKenna has lived in northern California with his family where he maintains a private practice that includes both traditional medicine and telemedicine. He enjoys the ability to provide specialty services to rural and underserved areas using telemedicine, which is a growing passion for him.