What does this mean? “Erickson is, in fact, a physician, although not an MD.” The only other group that are physicians but not an MD are DO’s? For your information DOs have the same training as MDs with the exception of OMT (look it up) and once done with medical school are trained in the same residency’s as their MD counterparts. You just insulted a large group of physicians. If he is an MD or DO makes no difference when it comes to practicing medicine. They go through the same post graduate training and state licensing.