Step 3 is the final exam in the USMLE series of examinations. It is part of the licensing requirements for Doctors of Medicine (M.D.) and international medical graduates to practice medicine in the United States. The USMLE Step 3 exam is considered the final step in the series of medical licensure examinations. Generally, it is a pre-requisite of the majority of the state licensing boards. Starting from 2014 USMLE Step 3 can be taken on two non-consecutive days, instead of two consecutive days.