Dr. Erhardt attended the University of Michigan, Ann Arbor, on a full athletic scholarship in football and obtained his undergraduate degree in Psychology. He also attended Edinboro University of Pennsylvania where he successfully finished a Masters Degree program in Biology. Dr. Erhardt then completed his academic medical education at Lake Erie College of Osteopathic Medicine in Erie, Pennsylvania.

Dr. Erhardt received his residency training at Ghent Family Practice in Norfolk, Virginia and his General Surgical Internship at the Naval Medical Center in Portsmouth, Virginia. He has had military training as Senior Medical Officer/Medical Department head and was an Undersea Diving Medical Officer providing medical support services for 1,500 Naval Special Warfare personnel.