PassProfessor’s Step 2 CK program is part of the expanding PassProfessor catalog. Our Step 2 CK bank — 1,992 original practice questions with an explanation for every question, built to USMLE’s published Step 2 CK specifications — is complete, and the program is in final preparation. Join the notify list and we will email you when enrollment opens — then use this guide to plan your path to the exam.
This program is part of the expanding PassProfessor catalog — join the notify list and we’ll email you when enrollment opens.
Step 2 CK, in one paragraph
USMLE Step 2 CK (Clinical Knowledge) is the one-day, multiple-choice clinical examination in the United States Medical Licensing Examination sequence, sponsored by the Federation of State Medical Boards (FSMB) and the National Board of Medical Examiners (NBME). It assesses whether you can apply medical knowledge and clinical science to patient care under supervision, with emphasis on health promotion and disease prevention. For exams taken on or after May 7, 2026, it presents up to 318 items in sixteen 30-minute blocks in a 9-hour testing session. Results are reported as a three-digit score; the current minimum passing score is 218. Eligibility, the current format, the full content specifications, registration, retakes, and test day are each covered below — this guide treats Step 2 CK on its own, because its format, weights, and scoring differ from both Step 1 and Step 3. The three-Step overview lives in the USMLE exam guide, and the practice program itself is on the USMLE Step 2 CK Exam Prep program page.
Who can take Step 2 CK?
Eligibility is set by the USMLE Bulletin of Information. For Step 2 CK you must be in one of the following categories both at the time you apply and on the day of your examination:
- A medical student officially enrolled in, or a graduate of, a U.S. medical school program leading to the MD degree accredited by the LCME (Liaison Committee on Medical Education), or
- A medical student officially enrolled in, or a graduate of, a U.S. medical school leading to the DO degree accredited by the Commission on Osteopathic College Accreditation (COCA), or
- A medical student officially enrolled in, or a graduate of, a medical school outside the U.S. listed in the World Directory of Medical Schools as meeting ECFMG eligibility requirements, and that meets ECFMG’s other eligibility criteria.
Two warnings from the Bulletin deserve emphasis. If your eligibility changes after you apply but before your test date, you must promptly notify the organization that registered you. And if you are dismissed or withdraw from medical school, you are not eligible for the USMLE — even if you are appealing the decision. Candidates on a leave of absence should check with their registration organization before applying or testing.
Step 2 CK sits between the other Steps in the pathway. It does not require a prior Step 1 pass as an eligibility matter under the categories above — but ECFMG Certification, which international medical graduates need for graduate medical education and for Step 3, requires passing both Step 1 and Step 2 CK. Step 3 then requires passing scores on Step 1 and Step 2 CK plus the degree (and, for IMGs, a valid ECFMG Certificate). Plan the sequence as a pathway, not as isolated exams.
The ECFMG pathway for international medical graduates
If your medical school is outside the U.S., ECFMG (the Educational Commission for Foreign Medical Graduates) sits at the center of your pathway in two distinct roles:
- ECFMG Certification eligibility gates your Step registration. ECFMG determines whether IMGs are eligible for ECFMG Certification, and that eligibility is a core requirement for IMGs to take the USMLE. Your Application for ECFMG Certification must be accepted before you can apply for your first Step exam. Since January 2026, however, the Step exam services themselves — registration, score delivery, eligibility extensions — are provided to IMGs by FSMB, a USMLE co-sponsor, through FSMB’s USMLE portal; ECFMG’s certification work continues through its MyIntealth portal.
- ECFMG Certification itself requires Step 2 CK — plus more. The medical science examination requirement for ECFMG Certification is met by passing Step 1 and Step 2 CK. The clinical skills and communication skills requirements are met by completing an ECFMG Pathway, which includes a satisfactory score on the Occupational English Test (OET) Medicine — or by a passing performance on the former USMLE Step 2 Clinical Skills (CS) component that remains valid for ECFMG Certification. To participate in the National Resident Matching Program (NRMP) Main Residency Match, IMGs must have satisfied all examination requirements for ECFMG Certification by the NRMP Rank Order List Certification deadline.
One routing note: individuals who graduate from Canadian medical schools on or after July 1, 2025 are considered IMGs for these purposes. Canadian graduates from before that date should read the current Bulletin of Information for their cohort’s guidance rather than relying on any summary, including this one.
The exam, piece by piece
Step 2 CK changed its block structure in May 2026, and the single most common factual error in Step 2 CK guides today is printing the retired format as the current one. This section gives the exam in its current form and names the retired form only so you can recognize outdated advice.
Current format (exams taken on or after May 7, 2026), per USMLE
- One-day examination in one 9-hour testing session
- Sixteen 30-minute blocks; the number of questions per block may vary but does not exceed 20
- Total items do not exceed 318
- A minimum allotment of 55 minutes of break time and a 5-minute optional tutorial; finishing a block or the tutorial early adds to your break time
For exams taken before May 7, 2026, Step 2 CK used eight 60-minute blocks of up to 40 questions, with 45 minutes of break time and a 15-minute tutorial. If your preparation materials are built around 40-question, hour-long blocks, they are built for a retired format — the pacing skill they train (settle in, work a long block, review flags at leisure) is not the skill the current exam rewards, which is resetting cleanly sixteen times and holding accuracy in short bursts.
What Step 2 CK covers
USMLE publishes Step 2 CK specifications by system/discipline, by competency, and by clinical science. USMLE notes that its percentages are subject to change at any time.
| Step 2 CK system / discipline | Published range |
|---|---|
| Nutrition | 15–20% |
| Social Sciences: Legal/Ethical Issues & Professionalism / Systems-based Practice & Patient Safety | 10–15% |
| Renal & Urinary System & Reproductive Systems | 7–13% |
| Cardiovascular System | 6–12% |
| Musculoskeletal System / Skin & Subcutaneous Tissue | 6–12% |
| Behavioral Health | 5–10% |
| Blood & Lymphoreticular / Immune Systems | 5–10% |
| Gastrointestinal System | 5–10% |
| Nervous System & Special Senses | 5–10% |
| Respiratory System | 5–10% |
| Multisystem Processes & Disorders | 4–8% |
| Endocrine System | 3–7% |
| Pregnancy, Childbirth & the Puerperium | 3–7% |
| Biostatistics & Epidemiology / Population Health / Interpretation of Medical Literature | 3–5% |
| Human Development | 2–4% |
By competency, the weight sits in patient care decisions: Diagnosis 16–20%, Laboratory/Diagnostic Studies 13–17%, Mixed Management 12–16%, Pharmacotherapy 8–12%, Clinical Interventions 6–10%, Health Maintenance/Disease Prevention 5–10%, and Prognosis/Outcome 5–9%, with Systems-based Practice & Patient Safety and Professionalism at 5–7% each and Practice-based Learning & Improvement at 3–5%. By clinical science, Medicine carries 55–65%, Pediatrics 17–27%, Obstetrics & Gynecology 10–20%, Psychiatry 10–15%, and Surgery 5–15%.
The study implication is direct: Step 2 CK is primarily a Medicine exam about deciding what is wrong and what to do next. Diagnosis, diagnostic studies, and mixed management together carry roughly 41–53% of the competency weight — for each presentation, the exam cycles through the sequence a supervising physician expects: most likely diagnosis, best next test, best next management step. Nutrition’s 15–20% system range surprises many candidates; it is the largest single system range on the exam, larger than cardiovascular. And the social sciences range — ethics, professionalism, patient safety, systems-based practice — is a defined, learnable 10–15% that pure clinical drilling misses.
How Step 2 CK items ask their questions
Most Step 2 CK items are patient vignettes: a presentation, findings, and results, followed by a single-best-answer question. The stem’s final line decides what kind of decision is being scored — “most likely diagnosis,” “best next step in evaluation,” “most appropriate management” — and the same vignette could support any of the three. Reading the last line first, then the vignette with that decision in mind, is the discipline the competency weights reward. A minority of items are built on scientific abstracts or pharmaceutical advertisements, testing interpretation of medical literature — the biostatistics and epidemiology range made concrete.
The passing standard, explained
Step 2 CK’s passing standard is set by the USMLE Management Committee, which reviews data for each component of the sequence approximately once every four years and decides whether to change the recommended minimum passing score.
| Fact | Current published detail |
|---|---|
| Score reporting | Three-digit score |
| Minimum passing score | 218 |
| Applies to exams administered on or after | July 1, 2025 |
| Prior standard | 214 (superseded — guides quoting 214 are out of date) |
Three things candidates routinely get wrong about this number:
- 218 is a scale score, not a percentage and not a question count. USMLE reports results on a three-digit scale. A minimum of 218 does not mean 218 out of some total, and it does not convert into a fixed percentage of questions you may miss — USMLE does not publish a percentage-correct threshold. Any resource that tells you “you need about X% correct to pass” is estimating, and should say so.
- The standard that applies is the one in force on your test date. Step 2 CK’s standard rose from 214 to 218 for exams on or after July 1, 2025. If your test date falls after a future review changes the standard again, the new standard governs — check USMLE’s Examination Results and Scoring page when you schedule, not when you start studying.
- A passed Step generally stays passed. If you pass a Step you are not allowed to retake it, except to comply with a time limit imposed by a U.S. medical licensing authority (or another authority the USMLE program recognizes) for completing all Steps. If you retake a passed Step 2 CK for that reason and fail the retake, you are no longer eligible for Step 3 — and Step 3 eligibility requires a passing performance on the most recent administration of the exams used to meet its requirements. Treat a passed Step 2 CK as an asset to protect, not a score to improve.
Score availability. Per USMLE, results are typically available within four weeks of your test date, but a number of factors can delay reporting — USMLE advises allowing at least eight weeks when selecting a test date and inquiring about results. You are notified by email from the organization that registered you, and your score report remains available on that organization’s website for approximately 365 days from the notification; after that, scores are provided only as an official transcript, for a fee, through your registration organization. If you do not open every block of the exam, the examination may not be scored and the attempt may be reported as an incomplete on your USMLE transcript — and incomplete attempts count toward the attempt limits below.
Fees and registration, step by step
What the real exam costs. USMLE’s Apply for Exams page lists the Step 2 CK application fee for the 2026 and 2027 cycles as $695, current as of November 2026. For Step 2 CK taken outside the U.S. and Canada, that page lists an additional region fee of $235 and states that the region fee is not a USMLE fee. Applicants who select the India testing region are subject to an 18% goods and services tax on OIDAR services that USMLE is required to collect and remit to India (in effect since December 4, 2024, per the Apply page). ECFMG Certification carries its own fees through Intealth/ECFMG, which are separate and are not stated in this guide. USMLE also operates a Fee Assistance Program, supported by co-sponsor NBME, to help medical students and residents with demonstrated financial need cover Step exam fees — the Apply for Exams page is the starting point.
Who you register with — this changed in January 2026. Under the USMLE Service Transition, consolidated in January 2026:
- Students and graduates of LCME- or COCA-accredited medical programs in the U.S. register through NBME (the MyUSMLE Portal) for Step exam services.
- Students and graduates of medical schools located outside the U.S. register through FSMB (FSMB’s USMLE Portal). For IMGs, the Application for ECFMG Certification — submitted through ECFMG’s MyIntealth portal — must be accepted before you can apply for your first Step exam, and FSMB confirms ECFMG Certification eligibility with ECFMG as part of registration.
The sequence, in order:
- *Read the current USMLE Bulletin of Information.* It is the governing document for eligibility, application, scheduling, and testing rules — this guide summarizes it; it does not replace it.
- Establish your registration route. U.S. LCME/COCA students and graduates: NBME/MyUSMLE. Outside-U.S. students and graduates: first MyIntealth and the Application for ECFMG Certification, then FSMB’s USMLE portal.
- Apply and pay the application fee through your registration entity, and receive your scheduling permit, which shows your chosen eligibility period. USMLE’s transition guidance advises allowing at least two weeks for IMG exam registration to be approved and the permit issued.
- Schedule with Prometric. Step 2 CK is administered at authorized Prometric test centers worldwide. The exam is not offered on major local holidays, and available dates appear in the scheduling system.
- Mind the change rules. Rescheduling, canceling, or changing test-center location within 45 days of a scheduled exam date carries a fee; changes can be made up to the day before the exam, not on the exam date. A name change must be received and processed no later than seven business days before your appointment, and you must bring the revised scheduling permit — without it, you will not be permitted to test.
Retakes and attempt limits
USMLE’s Bulletin eligibility page states the attempt rules plainly, and they are stricter than many candidates assume:
- Four-attempt ceiling. If you have attempted a Step four or more times, including incomplete attempts, and have not passed, you are ineligible to apply for any Step in the USMLE sequence. Attempts at the formerly administered Step 2 Clinical Skills (CS) count toward the limit.
- Pacing rule. You may not take the same Step more than three times within a 12-month period. A fourth attempt must be at least 12 months after your first attempt at that examination and at least six months after your most recent attempt. Incomplete attempts count.
- Passed Steps. A passed Step cannot be retaken except under the licensing-authority time-limit exception described in the passing-standard section above — with the Step 3 eligibility consequence if such a retake is failed.
- Sequence time limits. Many U.S. state medical boards require all Steps to be completed within a certain time frame. Those limits are the boards’, not USMLE’s; USMLE directs candidates to the FSMB website for state-specific requirements.
The practical reading: attempts are a finite, program-wide resource, and an unprepared attempt spends one. The score report from a failed attempt is your retake plan — rebuild around the systems and competencies it shows rather than repeating the same preparation on a shorter clock.
Test day
- Step 2 CK is taken at Prometric test centers worldwide. USMLE publishes information about the Biometric Enabled Check-in System used at Prometric centers on its Apply page; expect identity verification at check-in, and bring the scheduling permit and identification your registration requires, with names matching exactly.
- Breaks are taken between blocks, never inside one. You have a minimum of 55 minutes of break time, and finishing a block or the optional tutorial early adds to it. With sixteen blocks, the current format offers many more, shorter decision points about when to break — plan a break rhythm (for example, after every four blocks) rather than improvising one at hour six.
- The tutorial is shorter than it used to be. The current session includes a 5-minute optional tutorial, down from 15 minutes in the retired format. USMLE expects you to have run its interactive testing experience before test day — the on-the-day tutorial has fewer screens than the practice experience.
- Open every block. If you do not open every block, the examination may not be scored and the attempt may be reported as an incomplete on your transcript — and incomplete attempts count toward the attempt limits above.
- Accommodations take time. USMLE’s guidance is to submit accommodation requests as early as possible and to allow at least 60 business days for a decision.
How to study for Step 2 CK
- Build your plan from USMLE’s specifications, not a resource’s table of contents. USMLE publishes exactly what Step 2 CK covers, with ranges. If a topic is outside the specifications, it is not on your exam; if it is inside them, it is fair game whether or not a course emphasized it.
- Weight your time like the exam does. Medicine first (55–65% of the clinical science), then pediatrics, obstetrics and gynecology, psychiatry, and surgery in their published proportions. Inside Medicine, drill by system — and do not skip Nutrition (15–20%) or the social sciences (10–15%) because they do not feel like “clinical” studying.
- Train the three scored decisions separately. Diagnosis, diagnostic studies, and management are different skills with different error patterns. A candidate who always knows the diagnosis but over-orders testing, or under-manages, needs targeted drilling in that one decision type — your practice results should tell you which one it is.
- Practice in the current block geometry. Thirty-minute blocks of up to 20 questions reset the clock far more often than the retired hour-long blocks. That changes pacing, flagging discipline, and break strategy. Timed practice in any other geometry trains habits you will have to unlearn.
- Use clerkship knowledge actively. Step 2 CK rewards the reasoning you are building on rotations: for each real presentation you see, run the exam’s sequence — most likely diagnosis, best next test, best next step — before you look at what the team ordered. The exam is supervised practice, formalized.
- Respect the attempt limits in your scheduling decision. With a four-attempt ceiling and pacing rules on retakes, the cheapest attempt is a prepared one. Schedule when full-length timed practice in the current format sits comfortably above the 218 standard.
- For IMGs: run the certification clock alongside the study clock. ECFMG Certification requires Steps 1 and 2 CK and a Pathway with OET Medicine, and Match participation requires all examination requirements satisfied by the NRMP Rank Order List Certification deadline. Sequence the Pathway and credential verification early enough that paperwork, not knowledge, never becomes your bottleneck.
PassProfessor’s Step 2 CK program — 1,992 original practice questions with an explanation for every question, built on these same published specifications — is in final preparation. The USMLE Step 2 CK Exam Prep program page carries the notify list; join it and we will email you when enrollment opens.
Frequently asked questions
How many questions are on Step 2 CK? Up to 318 multiple-choice items, per USMLE, for exams taken on or after May 7, 2026 — delivered in sixteen 30-minute blocks of up to 20 questions each, in one 9-hour testing session. Exams taken before May 7, 2026 used eight 60-minute blocks; that structure is retired.
What score do I need to pass Step 2 CK? A minimum passing score of 218 on USMLE’s three-digit scale, for exams administered on or after July 1, 2025, per USMLE’s Examination Results and Scoring page. Guides quoting 214 are quoting the prior standard. The 218 is a scale score — USMLE does not publish a percentage-correct equivalent.
Is Step 2 CK harder than Step 1? They test different things. Step 1 tests foundational science and is reported pass/fail; Step 2 CK tests clinical decision-making under supervision and is reported as a three-digit score, which for many candidates carries residency-application weight that a pass/fail Step 1 does not. USMLE does not rank the Steps by difficulty, and neither does this guide — prepare for the job each Step actually tests.
When should I take Step 2 CK? When your preparation says you are ready: full-length timed practice in the current 30-minute block format, sitting comfortably above the 218 standard, with your weak systems and competencies drilled. Candidates typically sit Step 2 CK after their core clerkships, because its content is the clinical science those rotations teach — but the governing constraints are the Bulletin’s eligibility rules, your school’s requirements, and, for IMGs, the ECFMG Certification and Match deadlines.
Who registers me for Step 2 CK — NBME, FSMB, or ECFMG? Since the January 2026 USMLE Service Transition, students and graduates of LCME- or COCA-accredited U.S. medical programs register through NBME, and students and graduates of medical schools outside the U.S. register through FSMB, per USMLE’s Service Transition FAQs. ECFMG no longer registers IMGs for Step exams; ECFMG continues to run ECFMG Certification through MyIntealth, and an IMG’s Application for ECFMG Certification must be accepted before the first Step application.
What is ECFMG Certification, and do I need Step 2 CK for it? ECFMG Certification is ECFMG’s credential for international medical graduates entering U.S. graduate medical education. Per ECFMG, it requires passing USMLE Step 1 and Step 2 CK (the medical science examination requirement) and meeting the clinical and communication skills requirements through an ECFMG Pathway, which includes a satisfactory score on OET Medicine, or a valid passing performance on the former Step 2 CS. An IMG also needs ECFMG Certification — with a valid, unexpired Certificate — to be eligible for Step 3.
How many times can I attempt Step 2 CK? Per the USMLE Bulletin of Information eligibility page: if you have attempted a Step four or more times, including incomplete attempts, and have not passed, you are ineligible to apply for any Step. You also may not take the same Step more than three times within a 12-month period; a fourth attempt must be at least 12 months after your first attempt and at least six months after your most recent attempt.
How much does Step 2 CK cost in 2026? USMLE’s Apply for Exams page lists the 2026 and 2027 application fee as $695. Taken outside the U.S. and Canada, Step 2 CK adds a region fee of $235, which USMLE states is not a USMLE fee. ECFMG Certification fees are separate.
When will I get my Step 2 CK score? Per USMLE, results are typically available within four weeks of your test date, and you should allow at least eight weeks to receive notification that your score report is available. Notification comes by email from the organization that registered you, and the report stays available on that organization’s website for approximately 365 days.
Can I take Step 2 CK outside the United States? Yes. Per USMLE, Step 2 CK is administered at authorized Prometric test centers worldwide. (Step 3, by contrast, is administered only in the U.S. and its territories.)
Does passing Step 2 CK give me a medical license? No. The USMLE is the examination sequence for licensure; licenses are granted by individual U.S. state medical boards, which impose their own additional requirements, including — for many boards — a time frame within which all Steps must be completed. USMLE directs candidates to the FSMB website for state-specific requirements.
How does PassProfessor’s Step 2 CK program relate to this guide? The guide is the map of the real exam; the program is the practice built on that map — 1,992 original questions with an explanation for every question, weighted to the specifications tabulated above and drilled by system, clinical science, and competency. It is in final preparation; the program page carries the notify list.
Disclaimer
PassProfessor is an independent exam-preparation provider and is not affiliated with, sponsored by, or endorsed by the Federation of State Medical Boards (FSMB), the National Board of Medical Examiners (NBME), or the Educational Commission for Foreign Medical Graduates (ECFMG). USMLE® is a joint program of the FSMB and NBME. This guide is general information about USMLE Step 2 CK, current as of November 2026; the USMLE program’s and ECFMG’s official publications govern if anything here differs from them.