USMLE Step 2 CK (USMLE-STEP2CK-2026/S2)
Official
system14
| Category | Published share |
|---|---|
| Social Sciences (Legal/Ethical, Professionalism, Systems-based Practice & Patient Safety) | 10–15% |
| Renal & Urinary Systems & 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 the Medical Literature | 3–5% |
| Human Development | 2–4% |
nutrition
| Category | Published share |
|---|---|
| Nutrition | 15–20% |
task10
| Category | Published share |
|---|---|
| Patient Care: Diagnosis | 16–20% |
| Patient Care: Laboratory/Diagnostic Studies | 13–17% |
| Patient Care: Mixed Management | 12–16% |
| Patient Care: Pharmacotherapy | 8–12% |
| Patient Care: Clinical Interventions | 6–10% |
| Patient Care: Health Maintenance/Disease Prevention | 5–10% |
| Patient Care: Prognosis/Outcome | 5–9% |
| Systems-based Practice & Patient Safety | 5–7% |
| Professionalism | 5–7% |
| Practice-based Learning | 3–5% |
clinsci5
| Category | Published share |
|---|---|
| Medicine | 55–65% |
| Pediatrics | 17–27% |
| Obstetrics & Gynecology | 10–20% |
| Psychiatry | 10–15% |
| Surgery | 5–15% |
Readiness on this exam shows blueprint coverage and predicted recall only.
Source: USMLE Step 2 CK Content Outline and Specifications, retrieved 2026-11-02 · https://www.usmle.org/exam-resources/step-2-ck-materials/step-2-ck-content-outline-specifications
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