A medical doctor is the one referred to as MD, while a physician assistant is the one referred to as PA. One of the main differences between them is the requirement for being a medical doctor or a physician assistant. The qualification for a medical doctor is that an individual must have attended and graduated from a medical school, which is accredited and also licensed as well.
While for a physician assistant, on the other hand, a person must have finished a course in physician assistant, this actually depends on the state, the person must also be a license to perform most or some of the duties that are carried out by a medical doctor, which may include patient examination, giving prescription, and also making a diagnosis. However, a physical assistant would have to work under the supervision of a medical doctor. The cost of hiring a medical doctor is more than that of a physician assistant.