The USMLE assesses a physician's ability to apply knowledge, concepts, and principles, and to demonstrate fundamental patient-centered skills that are important in health and disease and that constitute the basis of safe and effective patient care. Each of the three Steps complements the others; no Step can stand alone in the assessment of readiness for medical licensure. Because individual medical licensing authorities make decisions regarding use of USMLE results, you should contact the jurisdiction where you intend to apply for licensure to obtain complete information.  You might also consider visiting the official website for the USMLE Test.