Step 3 in Two Days: The Format and a Readiness Checklist

• Day 1: multiple choice
• Day 2: management and cases
• Readiness checklist
• Reading practice scores
• Know the passing standard

Step 3 is the only USMLE exam split across two days, and that changes how you should prepare. Many residents and IMGs plan for it like a longer Step 2 CK. It is closer to two different exams that share a score.

§Day 1: multiple choice

Day 1 contains up to 232 multiple-choice items. The content leans on foundations of independent practice: diagnosis, mechanisms that still matter at the bedside, biostatistics, epidemiology, ethics and patient safety. Stamina is part of the test. Long blocks of statistics and reading-heavy vignettes punish anyone who has only done short timed sets.

§Day 2: management and cases

Day 2 has up to 180 more multiple-choice items, weighted toward advanced clinical medicine and management, plus 13 to 14 computer-based case simulations (CCS). In CCS you write orders, advance simulated time, move the patient between locations and react as results come back. There is no fixed list of “correct orders” that fits every case; USMLE notes that the software contains thousands of possible tests and treatments.

USMLE’s own Step 3 formats and sample questions page explains both days and lets you download the current practice software. Use it rather than older screenshots.

§Readiness checklist

Work through this list honestly before you confirm a date:

• Eligibility and paperwork are settled. You have checked current requirements with USMLE and any licensing, program or visa deadlines that depend on your result.
• You have used the official interface. You have run the current interactive testing experience and completed the official CCS sample cases at least once.
• You can sit two full days. You have done at least one full-length practice day under timed conditions, including breaks.
• Biostatistics is no longer a weak spot. You can work through study-design, test-characteristic and risk calculations without guessing.
• Your practice results are consistent. One good score is a data point. Two or more Step 3-scaled results in the same range are evidence.
• CCS has its own plan. You practise cases on a schedule, not as an afterthought in the final week.

§Reading practice scores

If you want a planning number from your UWorld self-assessments or the official sample questions, an independent, free USMLE Step 3 score calculator can combine them into a range without requiring an account. Note what it cannot do: it does not score CCS, and it does not accept NBME CCMSA (Forms 5–7) scores, because NBME says those reports are not intended to predict Step 3.

§Know the passing standard

The current minimum passing score is 200 for exams on or after January 1, 2024. USMLE is reviewing that standard at its November 2026 meeting, and any change would apply from January 1, 2027. If you test in 2027, check usmle.org shortly before your exam rather than relying on older study guides.