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Students, Residents & Practicing Physicians

USMLE Exams

NBME Self-Assessment Services (NSAS)
International Foundations of Medicine Individual Registration (IFOM)
Health & Wellness Coaching Exams

Administrators, Faculty & Program Directors

Subject Examinations
Customized Assessment Services (CAS)
International Foundations of Medicine (IFOM)
NSAS Voucher Program
USMLE Support Services

Chief Proctor Resource Site

Number of items and length varies by exam. Learn more by accessing the Program Guide.


How many items are on a Subject Exam and what is the duration of an exam?
What content is covered on each Subject Exam?