What is the USMLE® Step 1 ® – All About the USMLE Step 1 Exam Guide CSS for Pillar Pages What is the USMLE Step 1? The USMLE® Step 1 is a licensure exam that assesses medical students’ understanding of scientific concepts foundational to the practice of medicine. Step 1 emphasizes the principles and mechanisms … Continue reading USMLE® Step 1 Exam Guide