The NBME was founded in Philadelphia in 1915, with the goal of creating a voluntary medical licensing exam that would be accepted by U.S. states and territories in lieu of their own exams, allowing physicians to practice across state lines. Use of NBME Certifying Examinations ("Part" exams) grew in the years following its founding and in the years leading up to
World War II. Prior to the war, states still administered their own exams, and operated agreements to license doctors passed by other state exams through membership in the
Federation of State Medical Boards (FSMB). But by 1943, 45 of the 48 states accepted NBME exams for licensure along with their state exams. Graduates of international medical schools seeking a
medical residency in the United States generally take Step 1 and Step 2 CK after obtaining an MD or equivalent degree.
USMLE Step 3 must be passed before a
Doctor of Medicine can apply to obtain a license to practice unsupervised medicine in the United States. Because medical licenses are awarded by states, the process can vary depending on the state in which an MD or DO holder is seeking licensure. Some states cap the number times the USMLE Step exams can be taken or provide a time limit for completing the sequence of licensing exams. To assist examinees, NBME maintains a
web portal that provides access to self-assessment test forms to help medical students practice for upcoming exams such as the USMLE Step 1, USMLE Step 2 CK, NBME Subject Exams, and the International Foundations of Medicine (IFOM) exams. Beginning in 2021, most self-assessments became available in test forms that provide detailed answer explanations for both correct and incorrect answers. As of March 24, 2021, NBME assessment form numbers 25, 26, 27, 28, 29, and 30 replaced retired form numbers 18 through 24. • Basic Science and Clinical Science Exams • Advanced Clinical Exams • Comprehensive Exams == Current Leadership (as of 2021) ==