The United States Medical Licensing Examination ® (USMLE®) is a three-step examination for medical licensure in the United States and is sponsored by the Federation of State Medical Boards (FSMB) and the National Board of Medical Examiners® (NBME®).
Indian Students with MBBS in India or MBBS from Philippines can not practice directly in USA because it is must to have PG degree in medicine in USA. To apply for PG in USA, student has to clear USMLE at various levels. USMLE has clearly defined levels of medical courses after MBBS that is mandatory to be completed in USA.
Student has to qualify for Residency (Board certified PG while working in a Hospital under work permit). After MBBS, the above exams needs to be cleared. Indian doctors have to pass the above exams with high marks (230+). During this period, the students can give USMLE-2 CK exam in India to qualify for the Residency in USA. The doctors can then apply for work visa in USA once they get the residency confirmation.