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US Licensing · NBME + FSMB
Try a real question, explore your reasoning with Tutor and choose your next practice session.
$29/month · $99/year (USD)Every paid exam bank included
Start with a question
Choose an answer, read the explanation and explore your reasoning with Tutor.
Sample question · USMLE Step 2 CK
A researcher is enrolling adults into a medication trial. One candidate with delirium cannot explain the study purpose, risks or alternatives and has no advance research directive. The investigator proposes accepting the patient's signature because the patient can physically hold a pen. Which Belmont principle is most directly threatened?
Your iatroX preparation
Try a real question, explore your reasoning with Tutor and choose your next practice session.
Blueprint topics to explore
Try a question from the USMLE Step 2 CK bank and read the explanation.
Try the questionWork through a question you have attempted. Keep your answer alongside the conversation as you explore the key distinction.
Explore TutorChoose a timed set in your question bank and review your answers after the session.
This is a continuous question-bank practice set. The official Step 2 CK uses separately timed blocks and scheduled breaks.
Know your exam
16 blocks × 30 minutes · maximum 20 questions per block · one 9-hour Prometric testing session.
Up to 318 items, with at least 55 minutes of break time and a 5-minute optional tutorial from 7 May 2026.
Available year-round at Prometric centres. The new 16-block Step 2 CK software starts on 7 May 2026; the 2026 USMLE exam fee is $695, with a $235 region fee outside the US/Canada.
Choose a topic for focused revision and check your plan against the official specification.
System weightings from the NBME score report blueprint.
Themes from US and IMG candidate feedback in 2025–26.
Candidate-reported observations — not official guidance.
Designed for full-time dedicated study after clerkships.
Foundation across all systems. 80 questions/day. Identify bottom three systems using iatroX dashboard.
Targeted weak-area drilling. Read First Aid or US-aligned textbook chapters for weak areas. Spaced repetition surfaces incorrect items.
Six to eight NBME practice exams under timed conditions. Track score trajectory weekly.
Mixed adaptive sessions, mock-exam simulations, final week light review only. Confirm Prometric appointment.
Dedicated USMLE Step 2 CK question practice with answer explanations, guided Tutor review and study planning.
Choose the relevant bank and use the official exam guidance to plan your preparation.
Read with a purpose
choose your preparation resources
Build clinical reasoning through regular question practice, then use an official self-assessment to check readiness. Compare explanation quality, clinical reference access and your available study time.
Scroll across the table to compare all columns →
| Resource | What it helps you do | Access |
|---|---|---|
| USMLE Step 2 CK materials ↗Official samples and interface practice | Free sample clinical questions and the official interactive testing experience. | Free |
| NBME CCSSA ↗Official self-assessment | Comprehensive Clinical Science Self-Assessment with answer rationales and diagnostic performance feedback. | Paid per form |
| UWorld Step 2 CK ↗Commercial question bank | Clinical questions organised for Shelf review and Step 2 CK review, with detailed explanations and medical-library access. | Paid access by duration; check current plans |
| AMBOSS Step 2 CK ↗Commercial question bank and medical library | Clinical questions for Step 2 CK and Shelf exams, linked reference articles, adaptive practice and Anki integration. | Paid membership/Qbank access; check current plans |
| iatroXQuestion bank and Socratic Tutor | Practise questions, review explanations and explore your reasoning with Tutor. One subscription includes every premium bank. | $29/month or $99/year (USD)Free sample questions; full bank and Socratic Tutor with a subscription. Up to 10 sample questions daily, shared across exams. |
No account needed for samples. The daily 10-question allowance is shared across exams.
Published by iatroX. We checked the linked exam-body and provider pages for their advertised purpose and access. The suggestions compare uses, not pass rates or results from hands-on testing. Check each provider for current prices and inclusions.
A few useful answers
Since 1 July 2025 the passing standard is 218 on the three-digit scale (raised from 214). The mean score for US/Canadian first-time takers is approximately 250, so 218 sits well below the mean for adequately prepared candidates.
From 7 May 2026 Step 2 CK is delivered as 16 × 30-minute blocks of up to 20 questions each, over a 9-hour testing session. The total number of questions is similar to before; the block structure changed for shorter sustained focus periods.
USMLE performance data for 2023-24 lists Step 2 CK first-taker pass rates of 98% for US/Canadian MD candidates, 96% for DO candidates and 89% for non-US/Canadian candidates. Retaker pass rates are lower, so treat these as cohort-level data, not a personal prediction.
For most US/Canadian graduates a score above the national mean of 250 is good. Above 260 (75th percentile) is competitive for most specialties. IMGs typically need 240s+ to be competitive for residency applications.
Full USMLE Step 2 CK bank access is included in all-access. Up to 10 new sample questions per day are shared across exams, with no account required. A verified free account includes one guided Tutor session; continued Tutor use is included in all-access.
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