SynkMind™USMLE Step 2 CK
USMLE Step 2 CK · USMLE Step 2 Clinical Knowledge

The diagnosis is half of it. The next step is the question.

Long vignettes, five options, one best next step — internal medicine, surgery, pediatrics, OB/GYN and psychiatry at the physician’s depth, with ethics, patient safety and biostatistics woven through.

See the fourteen systemsOne day, everything open, no card.
9,994original questions, counted once
12practice papers of 300
33lectures
368sections, each with its own check
Encountera real item · Diagnostic 1 · Cardiovascular System

A Black patient with HFrEF (NYHA III) remains symptomatic despite optimized ARNI, beta-blocker, MRA, and SGLT2 inhibitor therapy. Which addition has demonstrated added benefit in this population?

Social Sciences: Ethics, Professionalism & Patient Safety 10–15%Renal, Urinary & 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 3–5%Human Development 2–4%
The real exam, as USMLE sets it
318questions at most
16 × 30 minblocks of up to 20, since May 2026
9 hoursone day, 55 minutes of breaks
218to pass, on a 1–300 scale
How you’ll study · fourteen systems, five clinical sciences

Every question is a management decision.

Step 2 CK is up to 318 questions in sixteen 30-minute blocks, scored with 218 to pass. Every question here carries its system and its clinical science, so you see whether the gap is the medicine or the next step.

The content outline, by systemexample scores · yours replace them
AreaWeightExample%
Social Sciences: Ethics, Professionalism & Patient Safety10–15%68%
Renal, Urinary & Reproductive Systems7–13%62%
Cardiovascular System6–12%66%
Musculoskeletal System, Skin & Subcutaneous Tissue6–12%61%
Behavioral Health5–10%70%
Blood, Lymphoreticular & Immune Systems5–10%59%
Gastrointestinal System5–10%64%
Nervous System & Special Senses5–10%60%
Respiratory System5–10%67%
Multisystem Processes & Disorders4–8%58%
Endocrine System3–7%63%
Pregnancy, Childbirth & the Puerperium3–7%57%
Biostatistics, Epidemiology & Population Health3–5%55%
Human Development2–4%65%
Ranges are the USMLE Step 2 CK system specifications (usmle.org, read 2026-10-03). Items there are coded to more than one row, and a Nutrition discipline (15–20%) runs across systems, so the ranges sum past 100%. The clinical sciences overlap too: Medicine 55–65%, Pediatrics 17–27%, OB/GYN 10–20%, Psychiatry 10–15%, Surgery 5–15%. Weak Spots drills the red ones.
The plan

Learn, test, rehearse — until the red rows clear.

  1. 1
    Learn33 lectures, 368 sections — each closed by its own check.
  2. 2
    TestWeak Spots and Smart Practice bring back what you missed, at the right interval.
  3. 3
    RehearseTwelve practice papers of 300, plus a mock at the real exam’s length, drawn from the pool.
What’s inside

Five things built for the clinical years.

Every plan opens everything. These are the five that matter most for this exam, shown the way you’ll meet them.

1Practice papers

Twelve practice papers of 300

The real paper is 318 questions. Our practice papers are 300 items. Every item is tagged to the USMLE content outline, so your score is reported area by area. 9,994 original questions in all, counted once.

  • Timed, or in tutor mode explaining as you go
  • A form of only what you got wrong
Diagnostic
1 × 300 items
Easy — where you stand
On-level
1 × 300 items
Medium — the paper as it should feel
Gauntlet
1 × 300 items
Hard — harder than the real thing, on purpose
High-yield
3 × 300 items
Hard — drills on what the outline weights
Mock
6 × 300 items
Medium — timed as a sitting

Every form with its real size. Difficulty is the form’s own rating.

2Explanations

Every wrong answer gets its own reason

Each explanation says why the right answer is right and why each distractor fails — the exact line you would want if you had picked it. Every item is checked blind by a second AI model that never sees the key. This one is a real item from the On-level 1 form.

ON-LEVEL 1PREGNANCY, CHILDBIRTH & THE PUERPERIUMMEDIUM FORM

A 25-year-old pregnant woman at 30 weeks reports ongoing opioid use disorder and is currently using heroin. She is interested in treatment that is safe during pregnancy.

Which of the following is the most appropriate management of her opioid use disorder?

A
Abrupt medically supervised withdrawal (detoxification)abrupt withdrawal is associated with high relapse rates and potential fetal risk, so opioid agonist maintenance is preferred in pregnancy.
B
Opioid agonist therapy with methadone or buprenorphineOpioid agonist therapy with methadone or buprenorphine is correct: opioid use disorder in pregnancy is treated with opioid agonist therapy using methadone or buprenorphine, which improves outcomes and avoids the fetal risks of withdrawal associated with abrupt cessation.
C
Naltrexone induction after detoxification as first linenaltrexone requires full detoxification and is not first-line in pregnancy, where agonist therapy is preferred.
D
Rapid opioid detoxification under anesthesiaUltra-rapid detoxification is unsafe in pregnancy; maintenance agonist therapy is preferred.
E
No pharmacologic treatment, only counselingcounseling alone is insufficient for opioid use disorder in pregnancy, where medication-assisted treatment improves outcomes.
3Axon Live

A tutor who asks what you do first — and why

Say what you are stuck on, out loud. Axon teaches the section in the voice of USMLE Step 2 Clinical Knowledge, draws the reasoning on a board as it speaks, and quizzes you on it before it moves on. It knows your syllabus, your weak spots and where you left off.

  • Teach me, Quiz me, I’ll listen, Why I missed it, Cram
  • Fifteen free minutes to meet it, once; top up in packs after that
  • Every session leaves a recap you can reopen
Axon · live · quiz me

“Inferior ST elevation, forty minutes of pain, a cath lab twenty minutes away. Before you reach for a drug — what is the next best step, and what would change it?”

on the boardquiz merecap after
4Lectures

33 lectures. A check after every section.

368 sections, each closed by its own knowledge check. Select any word on any page and Define opens a one-line meaning, why it matters and what it connects to — written for this exam.

Gastrointestinal Disease — GERD/PUD, Viral Hepatitis, IBD/IBS, Biliary & Pancreatic Disease, Appendicitis & Colorectal Cancer20 sections · e.g. GERD — Diagnosis, Empiric Therapy & Alarm Features
Health Maintenance & Clinical Pharmacology — USPSTF Screening, Adult Immunization, Behavioral Counseling & Prescribing Principles17 sections · e.g. USPSTF Adult Screening — Cancer & Cardiovascular
Women's Health & Obstetrics — Contraception, Abnormal Uterine Bleeding, Prenatal Care, Vaginitis, Cervical & Breast Screening17 sections · e.g. Contraception — Methods, Efficacy & Eligibility
EENT — Red Eye/Conjunctivitis, Otitis Media & Externa, Rhinosinusitis, Allergic Rhinitis & Pharyngitis16 sections · e.g. The Red Eye & Conjunctivitis — Viral, Bacterial, Gonococcal & Allergic

Four of the 33 lectures, by their real titles. The bars are an example of checks passed. Audio narration for USMLE Step 2 CK is on its way; the text is all here today.

5Weak Spots & the plan

Weak Spots, and a plan that reschedules itself

Your true score per area, settled from every answer you give anywhere in the course. The plan books the red ones around your week — hand it a screenshot of your timetable — gives every lecture seven spaced looks, and carries forward whatever a missed day ate.

Biostatistics, Epidemiology & Population Health55%
Pregnancy, Childbirth & the Puerperium57%
Multisystem Processes & Disorders58%
Blood, Lymphoreticular & Immune Systems59%
Next: 20 Biostatistics, Epidemiology & Population Health questions, then its lecture. (example)
Pricing

One price. Everything open. A free day to decide.

Monthly$49$49 / month
3 months$129$43 / month · billed once
6 months$179$30 / month · billed once
12 months$249$21 / month · billed once
1 free day, no cardCancel any timeTwo devices per accountThe same price for every exam
Questions

Before you start

Are the practice exams the real length?

No, and we say so. Step 2 CK is up to 318 questions in sixteen 30-minute blocks of up to 20 (the format since May 2026), one 9-hour day. Our twelve practice papers are 300 items each; the full mock draws 318 from all of them and runs the eight hours of testing as one sitting.

Are the lectures written for Step 2 CK?

Six are written for it — surgery, OB/GYN, pediatrics, psychiatry, emergency care, and ethics, patient safety and biostatistics. The other twenty-seven are our shared clinical core: the same CMDT-cited medicine lectures our nurse-practitioner and PA courses use, marked as shared in the reader. The questions, the papers and Axon are written at the physician’s depth.

Is this the same as the USMLE course?

No. Our USMLE course is Step 1. Step 2 CK is its own course with its own subscription, and every question in it has five options, A to E, like the real exam. ECGs, films and photographs are described in words for now.

Are these real exam questions?

No. Every item is original, written to the public content outline and checked blind by a second AI model that never sees the key. Nothing is copied from a published form, and we are not affiliated with any examining board.

How does the free day work?

Create an account and everything opens for one day — forms, lectures, Axon’s free minutes. No card. Keep it from $49 a month.

I have an access code. What do I do?

Create your account, open the course, and enter the code in Billing & Subscription or on the plan screen. A code opens the product without a subscription.