USMLE Step 1 2026 October — Format, Pass/Fail Change, and How to Prepare

The Step 1 Pass/Fail Change — What It Means

Before January 26, 2026, USMLE Step 1 reported a three-digit numeric score that residency programs used heavily in filtering and ranking applicants. A high Step 1 score (240+) was considered essential for competitive specialties. The NBME and FSMB changed Step 1 to pass/fail reporting to reduce the overemphasis on a single test score in residency selection.

What changed:

• Examinees still receive a pass or fail result
• No numeric score is reported to residency programs, the ECFMG, or state medical boards
• Examinees who fail still receive a numeric score to help them understand where they stand for remediation
• Examinees who pass do not receive a numeric score

What it means for residency applications:

• Step 1 pass/fail cannot differentiate candidates for residency programs — it is now a threshold requirement (must pass), not a ranking tool
• Step 2 CK (Clinical Knowledge) numeric scores have become significantly more important for residency screening since the pass/fail change — a strong Step 2 CK score is now a primary differentiator
• Research, clinical experience, letters of recommendation, and extracurriculars carry more weight than before
• The NBME reports that pass/fail has reduced excessive Step 1 studying and improved student wellness — but some students still study intensively to reduce failure risk

What has NOT changed:

• You must pass Step 1 to advance to Step 2 (and ultimately Step 3 for licensure)
• The exam content and format are essentially unchanged
• Failing Step 1 still has serious consequences for residency applications — a failed attempt appears in ERAS and is visible to programs

USMLE Step 1 Exam Format

Step 1 is a one-day computer-based exam administered at Prometric testing centers:

• 7 blocks of 40 questions — 280 questions total (though some are pretest/experimental)
• 60 minutes per block — strict time limit; no carryover between blocks
• 45 minutes of break time — you can distribute break time between blocks as you choose (unused tutorial time is converted to break time)
• Question format: Single-best-answer multiple choice, primarily clinical vignettes — a short patient scenario followed by a question requiring you to apply basic science knowledge to a clinical context
• No calculators: All calculations must be done without a calculator (the NBME provides scratch paper)

USMLE Step 1 Content Areas

Step 1 tests basic science knowledge integrated into clinical scenarios. The NBME organizes content by both discipline and organ system — questions may address pharmacology of cardiac drugs (intersection of pharmacology + cardiovascular), for example.

Major foundational disciplines:

• Pathology (~25–30%): The highest-weighted discipline. Mechanisms of disease, cellular injury, inflammation, neoplasia, organ-specific pathology. Robbins pathology is foundational.
• Pharmacology (~20%): Drug mechanisms, drug classes, side effects, toxicity, clinical uses. High-yield: beta-blockers, ACE inhibitors, antibiotics, antidepressants, antiseizure medications.
• Physiology (~20%): Normal organ function — cardiovascular, renal, pulmonary, endocrine, neurological. Understanding normal physiology is prerequisite to understanding pathology.
• Microbiology (~15%): Bacteria, viruses, fungi, parasites — identification, virulence factors, treatment. High-yield: Gram stain classification, HIV life cycle, STI presentations, TORCH infections.
• Biochemistry (~10%): Metabolic pathways (glycolysis, TCA cycle, fatty acid metabolism), enzyme deficiencies, genetics, molecular biology. High-yield: enzyme deficiency diseases (PKU, G6PD deficiency, Tay-Sachs).
• Anatomy and Histology (~10%): Clinically relevant anatomy — brachial plexus, dermatomes, heart anatomy, embryology. High-yield: nerve injury patterns, hernias, embryological defect syndromes.
• Other (~5–10%): Immunology (hypersensitivity reactions, autoimmune diseases, transplant rejection), behavioral science (biostatistics, ethics, psychiatric pharmacology), genetics.

Organ system cross-cutting: Questions are organized by organ system (cardiovascular, respiratory, GI, renal, musculoskeletal, neurological, reproductive, etc.) as well as discipline — expect questions that test pharmacology of GI drugs, pathology of renal disease, and physiology of the heart all in a clinical vignette format.

How to Prepare for USMLE Step 1

Step 1 preparation typically takes 6–12 weeks of dedicated study (after completing pre-clinical coursework). The most effective approach combines a high-yield question bank with systematic content review.

Standard preparation timeline:

• Months before dedicated study period: Take a baseline practice exam (NBME Form) to assess starting point. Identify weak areas.
• Weeks 1–4 (foundation): Read First Aid for the USMLE Step 1 once, actively annotating it with additional details from Pathoma (pathology), Sketchy (microbiology and pharmacology), or equivalent resources. Start question bank drilling.
• Weeks 4–8 (reinforcement): UWorld question bank — complete at least one full pass (2,400+ questions). Review every explanation regardless of whether you got the question right. Annotate First Aid.
• Final 2 weeks: NBME practice exams for score prediction. Review weak areas. Second pass of high-yield content.

Sample USMLE Practice Questions

Try these questions from our free USMLE practice tests. The correct answer and an explanation follow each question.

1. During exercise, which physiological change causes oxygen delivery to be increased to working muscles?

   • A. Rightward shift of the oxygen-hemoglobin dissociation curve
   • B. Leftward shift of the oxygen-hemoglobin dissociation curve
   • C. Increased hemoglobin oxygen affinity
   • D. Decreased 2,3-DPG

Answer: A. Rightward shift of the oxygen-hemoglobin dissociation curve

Exercise increases CO2, temperature, H+, and 2,3-DPG in working muscles, shifting the O2-Hb dissociation curve rightward (Bohr effect), decreasing hemoglobin affinity and increasing O2 delivery.

Answer: A. Increased V/Q ratio (dead space physiology)

PE blocks perfusion to a ventilated lung segment, increasing V/Q ratio toward infinity (dead space effect), wasting ventilation without gas exchange.

Answer: A. Nephrotic syndrome

Nephrotic syndrome is defined by the triad of massive proteinuria (>3.5 g/day), hypoalbuminemia, and edema, with hyperlipidemia and lipiduria as secondary features.

Answer: A. TMP-SMX (trimethoprim-sulfamethoxazole)

TMP-SMX is the first-line prophylaxis for PCP when CD4 count falls below 200 cells/μL in HIV-infected patients.

Take the full USMLE practice test