The three-part USMLE examination consists of:
- Part 1: Students are tested on their knowledge of the basic medical sciences is during the end of the second year of medical school.
- Part 2: During the fourth year, students are tested on their ability to apply medical knowledge during the care of patients (while under supervision).
- Part 3: Students are tested on their ability to apply medical knowledge during unsupervised medical care. The test is taken during the first year of residency.

