Physician licensure for physicians practicing in multiple states has been a difficult proposition to this point, with varying requirements for licensure in each individual state, the cost of licensure being what it is despite perhaps seeing only a few patients in each state. However, there continues to be some movement towards easing that process. According to an article in Newswise at http://www.newswise.com/articles/eight-states-formally-introduce-legislation-to-speed-physician-licensing-across-state-lines, some state legislatures are viewing passage of the Interstate Medical Licensure Compact, model legislation that would speed the process of issuing licenses for physicians who wish to practice in multiple states. In nine state, Iowa, Minnesota, Nebraska, Oklahoma, South Dakota, Texas, Utah, Vermont, and Wyoming, the model legislation has been recently introduced.
In a move that creates some confusing liability issues for physicians, to say nothing of quality of care issues for patients, the State of Missouri has now allowed for a license called an "assistant physician" to be issued to someone who has been graduated from any medical school and has completed steps 1 and 2 of the USMLE but has not completed any residency training. These folks will be allowed to call themselves "doctor" and be allowed to practice as regular doctors. Interestingly, the state of Missouri has traditionally placed more restrictions on nurses than most states and does not allow for independent practice by advanced practice nurses as many states have done to help ease the primary care physician deficit.