The USMLE stands for the United States Medical Licensing Examination. It is an examination divided into three steps that every individual needs to pass if they wish to practice medicine in the United States. The USMLE is sponsored by the National Board of Medical Examiners and the Federation of State Medical Boards.
While pursuing their medical education and after successful completion of an M.D degree, physicians will be required to pass this examination to gain a license to practice medicine in the US.
All three steps in the USMLE exam complement each other and are framed to assess the skills and abilities of the physician. It means that one step alone cannot stand in the line of assessment for the readiness of a doctor to gain their medical license.
Generally, the first two steps are taken by the student during medical school. While the third step is taken after graduation.