The process of becoming a medical doctor is long and arduous.
You must complete an undergraduate degree, four years of medical school and three years of residency, which includes classroom time and on-the-job training.
In order to practice medicine in a state, you must be licensed in that state. State practice laws set standards for entry and regulate conduct.
The primary mechanisms for assuring the competence of those who enter the profession are testing and requirements for minimum levels of education and training.