Why would you not? I have seen a provider with significant issues in one state that prevented them from getting privileges. The issues were not reported to the current state. You are trying to obtain a picture of their history and make sure it is clean. Not just check the state they have had a license in for only a year. They could be an axe murderer hopping around state to state. If they graduated in 1997 and have been in California most of that time and all of a sudden they have moved cross country? You want to obtain prior malpractice claims histories why would you not want to check licencesuresin all states they have held?