USMLE Step 1

It assesses whether you understand and can apply important concepts of the sciences basic to the practice of medicine, with special emphasis on principles and mechanisms underlying health, disease, and modes of therapy. The material is organized by an integrated content outline along two dimensions, system and process, rather than by isolated courses.

For candidates testing on or after May 14, 2026, Step 1 is a one-day examination divided into fourteen 30-minute blocks within a single 8-hour testing session. It includes a minimum of 55 minutes of break time and a 5-minute optional tutorial. Earlier administrations used a different block structure, so confirm your own test date.

The number of questions per block on a given examination form may vary, but does not exceed 20 under the format used for test dates on or after May 14, 2026. Because block length varies by form, do not build your pacing plan around one fixed number.

Yes. The amount of time available for breaks may be increased by finishing a block of test items or the optional tutorial before the allotted time expires. Unused block or tutorial time therefore converts into additional break time, which rewards steady pacing rather than rushing.

Step 1 is administered at Prometric test centers. Scheduling and rescheduling, locating a test center, and confirming or canceling an appointment are handled through the Prometric website. Read the Bulletin of Information before you register, because you certify that you will comply with its policies and procedures at the time you apply.

Examinees must meet certain requirements before becoming eligible to take Step 1, and the program publishes information on time and attempt limits, retakes, and what to do if your eligibility status changes. Those specifics live in the eligibility and Bulletin of Information materials rather than on the exam overview page, so review them directly before planning a retake.

It is a demanding, mechanism-focused exam rather than a recall test, and it assumes working command of physiology, pathology, pharmacology, and behavioral science integrated by organ system. Difficulty is best managed by studying from the published content outline and specifications and by practicing with the official sample questions in the interactive testing experience.

Start with the content outline and specifications so your review matches the exam's system-and-process organization. Then use the interactive testing experience to learn the interface and try sample questions early, not in the final week. Free exam resources from the program round this out, and the Bulletin of Information should be read before registration.

Yes. The USMLE program states that it is committed to providing test accommodations to examinees with documented disabilities under the Americans with Disabilities Act (ADA). Information on the types of accommodations available and instructions for submitting a request are published by the program; requests should be made well before your intended test date.

Yes, a 5-minute optional tutorial is included for candidates testing on or after May 14, 2026. It is optional, so skipping it frees that time for breaks instead. Time remaining from a finished block also rolls into your break allotment, giving you flexibility across the testing session.