医学生去美国攻读医学“doctor”学位，要参加什么考试，要读几年？

Before graduating from a medical school and achieving the degree of Medical Doctor, students have to pass the United States Medical Licensing Examination (USMLE) and to take (but not necessarily pass) both the Clinical Knowledge and Clinical Skills parts of The MD degree is typically earned in four years. Following the awarding of the MD, physicians who wish to practice in the United States are required to complete at least one internship year (PGY-1) and pass the USMLE. In order to receive Board Eligible or Board Accredited status in a specialty of medicine such as general surgery or internal medicine, then undergo additional specialized training in the form of a residency. Those who wish to further specialize in areas such as cardiology or interventional radiology then complete a fellowship. Depending upon the physician's chosen field, residencies and fellowships involve an additional three to eight years of training after obtaining the MD. This can be lengthened with addition