The USMLE assesses a physician’s ability to apply knowledge, concepts, and principles that are important in health and disease and that constitute the basis of safe and effective patient care.
The USMLE means actually three exams, called STEPS. Each of the three steps complements the others; no step can stand alone in the assessment of readiness for medical licensure.

Step 1 has approximately 350 multiple-choice test items, divided into seven 60-minute blocks, administered in one eight-hour testing session.
Step 2 CK has approximately 370 multiple-choice test items, divided into eight 60-minute blocks, administered in one nine-hour testing session.
Step 2 CS has 12 patient cases. You will have 15 minutes for each patient encounter and 10 minutes to record the patient note. If you do not use the entire 15 minutes for the patient encounter, the remaining time will be added to the time you have to record the patient note. The testing session is approximately eight hours.

Step 3 has approximately 480 multiple-choice test items, divided into blocks of 35 to 50 items. You will have 45 to 60 minutes to complete each of these blocks. Step 3 is a two-day examination containing computer simulations.

USMLE