Hi,

Well I would like to tell you that after MBBS program ends a doctor can apply for USMLE exam . In USA once you are done with your studies, you are required to give USMLE exam which is organised in three levels and once you qualify all the three levels then you are allowed to get into residency program but finding one is really difficult. USMLE can not guarantee you residency rather it will only help you in allowing you to go search for residency in US hospitals. Same goes for international students as well but the level of difficulty is a lot and getting residency is the most difficult thing to do.

I hope my answer helps.

All the best.