USMLE Step 1 Topics
Every concept USMLE Step 1 tests, mapped by area. Each section shows the topics, flags the high-yield ones, and surfaces the misconceptions real students bring into exam day. Not a study plan — a map of the terrain so you know what you're walking into.
Biochemistry
Metabolism, genetics, and molecular biology — the underlying mechanisms that explain why drugs work and diseases happen.
Immunology
Innate and adaptive immunity, hypersensitivity, and immunodeficiencies — the logic behind how the body attacks pathogens and itself.
Microbiology
Bacteria, viruses, fungi, and parasites with their bugs-to-drugs relationships — the highest-density factual area on the exam.
General Pathology
Cellular injury, inflammation, neoplasia, and repair — the shared language every organ-system block is written in.
General Pharmacology
Receptor kinetics, drug metabolism, and toxicology principles that apply before you ever open a drug chart.
Public Health Sciences
Biostatistics, epidemiology, and study design — the area most students underestimate until they lose easy points on it.
Cardiovascular
Heart and vascular physiology, arrhythmias, and cardiac pathology with the drugs targeting each mechanism.
Endocrine
Hormone axes, feedback loops, and gland disorders where a single lab value can anchor the entire diagnosis.
Gastrointestinal
Gut physiology, liver disease, and GI pathology — a wide topic with more misconceptions per topic than almost any other area.
Hematology and Oncology
Anemias, coagulation disorders, and cancer biology including the oncogenes and tumor suppressors the exam loves to test.
Musculoskeletal, Skin, and Connective Tissue
Bone, joint, muscle, and skin pathology including the autoimmune connective tissue diseases that overlap confusingly with each other.
Neurology and Special Senses
Neuroanatomy, localization, and CNS pathology — questions where getting the anatomy right is the entire task.
Psychiatry
DSM diagnoses, psychopharmacology, and behavioral science with the diagnostic criteria that students consistently mix up.
Renal
Kidney physiology, acid-base, and fluid balance — the area where understanding the math separates memorizers from scorers.
Reproductive
Embryology, reproductive endocrinology, and OB/GYN pathology — the broadest topic count on the list with layered hormonal logic.
Respiratory
Lung mechanics, pulmonary pathology, and ventilation-perfusion relationships that connect directly to cardiovascular and renal questions.
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