5.0The emergency medicine shelf is NBME's Emergency Medicine Advanced Clinical Subject Exam, 110 questions in 2 hours 45 minutes on NBME's timing chart. It flips the balance of every other shelf: pharmacotherapy, intervention and management is 60–65% of the exam, while diagnosis is only 25–30%.
In other words, the exam assumes you can recognise the problem and asks what you do next, in what order, and how fast. Stabilisation and sequence matter more here than on any other shelf.
What emergency medicine shelf questions look like
An emergency medicine question drops you into the department with a patient who is often unwell and undiagnosed. You get vitals and a few findings, and the question asks what to do now: secure the airway, give fluids, give an antidote, image, or call a surgeon.
Several answers may all be correct actions; the test is choosing the one that comes first. Toxicology questions hide the answer in the vital signs, the pupils and the skin.
What the Emergency Medicine shelf covers
NBME's Emergency Medicine (Advanced Clinical) outline is the source here. See the outline.
| By system | Share of exam |
|---|---|
| Cardiovascular, respiratory, gastrointestinal | 10–15% each |
| Multisystem processes and disorders | 10–15% |
| Nervous system, musculoskeletal, endocrine | 5–10% each |
| Immune, blood, behavioral health, skin, renal, pregnancy, reproductive | 1–5% each |
| Social sciences, including ethics | 1–5% |
| By physician task | Share of exam |
|---|---|
| Health maintenance, pharmacotherapy, intervention and management | 60–65% |
| Diagnosis: history, exam, diagnostic studies, outcomes | 25–30% |
| Applying foundational science concepts | 5–10% |
NBME adds that a subset of questions across the organ systems focuses on resuscitation and trauma (10–15%) and on environmental and toxicologic disorders (10–15%). Patients 18 to 65 make up 60–70% of questions, 66 and older 20–25%, and children 8–12%.
High-yield areas on the emergency medicine shelf
- Resuscitation: cardiac arrest, shock and the order of priorities in an unstable patient.
- Trauma: the primary survey and what to do before imaging.
- Toxicology: recognising common poisonings and overdoses and choosing the antidote, inside the 10–15% environmental and toxicologic share.
- Chest pain and shortness of breath: the cardiovascular and respiratory emergencies that each make up 10–15%.
- Abdominal pain and GI emergencies, another 10–15%.
- Environmental injuries: heat, cold and other exposures.
- Altered mental status and neurologic emergencies.
- Disposition: who goes home, who is admitted and who goes to the operating room.
How emergency medicine shelf scores work
The EM exam is one of NBME's Advanced Clinical Science subject exams, and its result arrives as an equated percent correct score from 0 to 100 (NBME Subject Exam Program Guide). There is no NBME pass mark. Each school turns the score into a grade itself, and NBME's grading guidelines exist to help clerkship directors draw those lines; check with your EM clerkship which numbers it uses for pass and honors this year.
Because the cut-offs are local, the useful comparison is with other examinees: see how EPC scores line up with percentiles in our shelf percentiles guide. Schools often receive results the day after their testing window closes, sometimes up to three business days later, and you read yours in the MyNBME examinee portal.
Studying for a top emergency medicine shelf score
- Put management first. Health maintenance, pharmacotherapy, intervention and management are 60–65% of this exam, so drill the next step for each presentation before you memorize the differential.
- Give resuscitation, trauma and toxicology their share. Each of those groups is 10–15% of questions across the systems, which makes antidotes and the primary survey worth a daily review.
- Check yourself with the official EM forms. NBME's Mastery Series sells emergency medicine forms of 50 questions at $21, timed at 1 hour 15 minutes, with a conversion to the approximate subject exam scale (NBME). One early in the block and one in the last ten days tells you where the remaining shifts of study should go.
On exam day you get 2 hours 45 minutes for 110 questions, and NBME adds a 15-minute tutorial before web exams (NBME timing chart). Shift work wrecks sleep, so take at least one practice form after a night shift to see what your pace looks like tired.
A closer look at resuscitation and toxicology
Resuscitation and trauma. NBME says 10–15% of questions focus on resuscitation and trauma. Learn the order of priorities in cardiac arrest and in the injured patient, and expect questions that test what you do before any imaging.
Toxicology. Another 10–15% covers environmental and toxicologic disorders. Learn the common toxidromes by their vital-sign and exam patterns, and pair each with its specific treatment or antidote.
Common mistakes on the emergency medicine shelf
- Working up before stabilising. In an unstable patient the airway, breathing and circulation come first.
- Picking the right action in the wrong order, which is often what the question tests.
- Studying diagnosis the way you would for the medicine shelf, when management is 60–65% of this exam.
- Missing the toxidrome hidden in the vital signs and pupils.
- Forgetting disposition: a correct diagnosis with the wrong next location is still a wrong answer.
Test-day tips for the emergency medicine shelf
- Airway, breathing and circulation before anything else.
- When several answers are correct, pick the one that must happen first.
- Read vitals, pupils and skin for the toxidrome.
- Finish each case by asking where the patient goes next.
How to study for the emergency medicine shelf during the rotation
Emergency department shifts are a run of undifferentiated complaints, which is exactly how the exam is written. After each shift we take the presentations you saw and ask the same three questions: what has to happen first, what is the most likely cause, and where does the patient go next.
We build resuscitation and toxicology early because they cut across systems, then cover the large system emergencies, and finish with timed blocks that train sequencing under time pressure.
A sample week of emergency medicine shelf prep with us
- After early shifts: resuscitation and the primary survey, practised as ordered steps.
- Midweek: chest pain, shortness of breath and abdominal pain, the largest system emergencies.
- Late week: toxicology and environmental injuries.
- Weekend: a timed mixed block focused on sequencing and disposition.
Shift work moves the schedule around; the plan moves with it.
After each emergency medicine practice form, ask
- Did I stabilise before I investigated?
- Was the action right but the order wrong?
- Did I recognise the toxidrome from the vital signs?
- Did I choose the right disposition?
- Did resuscitation questions follow current AHA steps?
Where the emergency medicine shelf leads
Emergency cases are scattered through Step 2 CK and COMLEX Level 2-CE, often as the first scene of a longer case. NBOME's Level 2-CE blueprint lists osteopathic patient care and procedural skills at a minimum of 30%, and the stabilise-first reasoning from this shelf is central to it.
What carries over most is sequence: knowing which correct action comes first. That skill decides a large share of management questions on every later exam.
Study resources for the emergency medicine shelf
Emergency medicine practice forms are part of NBME's Clinical Science Mastery Series, 50 questions for $21 each. We review misses by whether the action was wrong or the order was wrong, since sequence is so much of this exam.
Resuscitation questions follow the American Heart Association's CPR and emergency cardiovascular care guidelines, and trauma priorities follow the American College of Surgeons' Advanced Trauma Life Support program. Add a question bank and an Anki deck for antidotes and resuscitation steps. For review on commutes, the free Divine Intervention podcast has an episode on high-yield trauma aimed at the surgery and EM shelves.
Who tutors the emergency medicine shelf
Emergency medicine shelf prep is led by Dr. Shauhin “Sean” Moazezi, DO, a board-certified internist who tutors clerkship shelf exams, with Dr. David Wadie, DO, a cardiology fellow and board-certified internist, which fits an exam where cardiovascular emergencies are among the largest systems. Our team also includes Chris Sawyer, DO, an emergency medicine physician who tutors emergency medicine board certification.
One-on-one emergency medicine shelf tutoring is $349 per 50-minute session by live video (Zoom or Google Meet), planned around your shift schedule. Start with a free 20-minute intro consult.
A student on Step 1, rotations and Step 2
“…He helped me make a plan, pass on my first attempt, got me then through all my clinical rotations to pass my Shelf exams on the first try, got me a good Step 2 score, coached me on my Interview season (where I got a good amount…”
— Tim S.
“My step 2 score went from a 199 to a 248 in 5 weeks with Sean and Alex’s help. … They are experts at STEP 2 and got me through it after I had a difficult time passing shelf exams this year.”
Sara Z., shelf exams and Step 2 CK