Outstanding international medical doctors pass many board exams and are admitted by outstanding hospital in the US are usually stuck behind a lengthy visa process called "Administrative Processing". While this process might take up to 6 months without having any impact on other types of applicant, it seriously affects this category, because the time of their admission is two months before they need to attend the academic "time sensitive" program.
Many of these scholars loose their jobs after months of delay. It is horrible for them because the program have to dc the contract.
The burden on the hospital and patient care is not less.
A hospital with one or two less physicians than the standard will face problems both in providing health care and labor regulations.