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Psychiatry Shelf Exam Prep

A complete guide to the NBME psychiatry shelf — what gets tested, how to study for it, and the practice questions that mirror the exam format. Written by practicing psychiatrists for medical students who want to walk in prepared.

About the psychiatry shelf

The psychiatry shelf is an NBME subject exam taken at the end of your psychiatry clerkship. It has 110 multiple-choice questions and you get 2 hours and 45 minutes — roughly 90 seconds per question. Most students take it in third year, after a 4- to 6-week rotation.

The exam tests pattern recognition more than memorization. Vignettes give you a presenting complaint, history, mental status findings, and ask you to pick the diagnosis, the next step, or the best treatment. The answer choices are usually plausible, and the difference between "most likely" and "next best step" matters.

Scoring is percentile-based against a national reference group. Your school converts that to a pass/fail or letter grade. The cutoffs vary by institution.

High-yield topics

Content the shelf hits hardest. We have a deeper article on each — read alongside your question practice for context.

Mood disorders

Major depressive disorder, persistent depressive disorder, bipolar I and II, cyclothymia. Know the diagnostic timelines, first-line pharmacotherapy, and when to escalate to ECT.

Bipolar disorder

Manic vs. hypomanic episodes, bipolar I vs. II, mixed features, and the long-term mood stabilizer landscape — lithium, valproate, lamotrigine.

Anxiety disorders

Generalized anxiety, panic disorder, agoraphobia, social anxiety, specific phobia. SSRIs are first line; benzodiazepines are not — that distinction shows up repeatedly.

Psychotic disorders

Schizophrenia time criteria, schizoaffective vs. mood with psychotic features, brief psychotic disorder, schizophreniform. Know the antipsychotic side-effect profiles cold.

Personality disorders

Cluster A, B, C — recognize patterns, not buzzwords. Borderline pharmacotherapy, narcissistic vs. antisocial differentiation, and when therapy is the answer over medication.

Substance use disorders

Withdrawal management for alcohol, opioids, benzodiazepines, stimulants. CIWA-Ar and COWS scoring. Medication-assisted treatment options.

PTSD & trauma

PTSD diagnostic timeline, acute stress disorder, adjustment disorder. First-line treatments are trauma-focused therapy and SSRIs; prazosin for nightmares.

OCD & related disorders

OCD, body dysmorphic disorder, hoarding, trichotillomania. SSRIs at higher doses than for depression, plus exposure and response prevention.

Eating disorders

Anorexia nervosa restrictive vs. binge-purge, bulimia, binge eating disorder. Refeeding syndrome, fluoxetine for bulimia, why bupropion is contraindicated.

Neurocognitive disorders

Delirium vs. dementia differentiation, Alzheimer's vs. vascular vs. Lewy body vs. frontotemporal. Know which medications to avoid in each.

A 4-week study timeline

A practical week-by-week plan. Adjust the pace if your rotation is shorter or longer.

  1. Week 1

    Mood, anxiety, psychosis

    Cover the highest-yield topics first. Read about each disorder, then do 25–40 questions per topic the same day. Note the patterns that trip you up.

  2. Week 2

    Personality, trauma, OCD, eating

    These come up less often but get tested in clusters. Build comparison tables — "what differentiates X from Y" — for the disorders that look similar on a vignette.

  3. Week 3

    Substance use, neurocognitive, child & adolescent, geriatrics

    High-yield drug withdrawal protocols and dementia subtypes. Spend extra time on child-onset disorders (ADHD, autism, Tourette) — they show up more than students expect.

  4. Week 4

    Mixed practice + weak-area review

    Switch to mixed practice questions to mimic the real exam. Use your performance dashboard to find the topics still under 70% and re-read those rationales.

Rating scales to know cold

Vignettes routinely give you a scale score. Know the cutoffs. Each link below opens the actual scale with auto-scoring and interpretation bands.

Common pitfalls

Mistakes that cost students points. Avoid these and you'll already be ahead of most of the cohort.

Memorizing DSM criteria without the timelines

The shelf loves time-based differentials: 2 weeks vs. 1 month, 6 months vs. 1 year. Knowing the symptoms is half the battle. Knowing the durations is the other half.

Ignoring child & adolescent psychiatry

Many students under-study pediatric content. The shelf weights it heavier than the typical psychiatry rotation reflects.

Guessing at first-line treatments

When in doubt: SSRI for depression, anxiety, OCD, PTSD, bulimia. Lithium for bipolar maintenance. Atypical antipsychotics for schizophrenia. Memorize the defaults.

Skipping the rating scales

Vignettes routinely give you a PHQ-9 or GAD-7 score. Know the cutoffs cold — they can be the difference between mild, moderate, and severe in the answer choices.

Frequently asked questions

How long is the psychiatry shelf exam?
The NBME psychiatry shelf has 110 multiple-choice questions and you have 2 hours and 45 minutes to complete it. That works out to about 90 seconds per question — pacing matters.
When do most students take the psychiatry shelf?
At the end of the psychiatry clerkship in third year of medical school. Some schools schedule it at the end of a 4-week rotation; others do 6 weeks. Check your school's requirements early so you can plan your study timeline.
How much time should I spend preparing for the psych shelf?
Most students do 2–4 weeks of focused prep alongside their clerkship work. Aim for 2–3 hours of study per day with at least 40 practice questions per study day. Consistency beats cramming for content this broad.
What topics show up most on the psychiatry shelf?
Mood disorders, anxiety disorders, and psychotic disorders together account for the largest share of questions. Personality disorders, substance use, and neurocognitive disorders are the next tier. Child and adolescent psychiatry is over-represented relative to the rotation experience.
How is the psychiatry shelf scored?
NBME shelf exams are scored on a percentile basis against a national reference group. Your school converts that to a pass/fail or letter grade. The exact cutoffs depend on your institution; most expect at least the 5th–10th percentile to pass and use higher percentiles for honors.
Do I need a question bank or are practice questions in textbooks enough?
A question bank is the single highest-yield resource for shelf prep. Textbook questions are too few and rarely match the NBME format. Pair a question bank with one concise content review (First Aid, Blueprints, or Pre-Test) and skip the dense reference texts.

Practice with shelf-style questions

Every question in our bank is written by a practicing psychiatrist and reviewed for clinical accuracy. Filter by topic, drill weak areas, or run a mixed-mode session that mirrors the real shelf.

Start practicing

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