PMHNP Diagnosis Guide:
DSM-5-TR Criteria, Clinical Features, and Board Prep
Knowing diagnostic criteria is the foundation. But boards do not test criteria recall in isolation — they test your ability to apply criteria to ambiguous clinical presentations, distinguish between overlapping conditions, and connect diagnosis to treatment. A patient who meets MDD criteria might actually have bipolar depression. A patient with psychosis might have schizophrenia, schizoaffective disorder, or a substance-induced condition. The diagnosis you choose determines the medication class, the monitoring plan, and the prognosis you communicate.
This reference library organizes 34 psychiatric diagnoses into structured pages that cover what you actually need for boards and clinical practice: essential diagnostic criteria, the clinical features that affect treatment, differential diagnosis reasoning, connections to medications and related conditions, and practice questions with detailed explanations.
If you want to study how two diagnoses compare head-to-head, the differential diagnosis guide covers high-yield pairs with side-by-side analysis and clinical anchors. If you want to review the medications used to treat these conditions, the psychopharmacology guide covers 46 medications organized by drug class.
- Full diagnosis reference pages with DSM-5-TR criteria, clinical features, and board-tested details
- Board-style practice questions embedded in every diagnosis page, with clinical vignettes and detailed rationales
- Differential diagnosis reasoning for commonly confused conditions, with clinical anchors
- Cross-linked to medications, differentials, flashcards, and case studies
Structured around the same clinical reasoning patterns used in practice: criteria, features, differentials, treatment connections, and application.
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How to use this page: If you are studying for boards, start with the high-yield categories (depressive, bipolar, anxiety, psychotic), then branch into the categories your practice questions reveal as weak areas. If you are in clinicals or a new grad, use the diagnosis pages as quick references before patient encounters — each page is structured so you can find criteria, red flags, and treatment connections quickly.
New here? Start with the category that feels most challenging, read one diagnosis page thoroughly, then do 10 practice questions on that topic. Want to compare two diagnoses head-to-head? Go to the Differential Diagnosis Guide.
How PMHNP Board Exams Test Diagnostic Knowledge
Diagnostic knowledge on PMHNP boards is not tested in isolation. It is woven through clinical vignettes where the correct answer depends on identifying the right diagnosis from an ambiguous presentation, then connecting that diagnosis to the right treatment.
ANCC PMHNP-BC: Diagnostic reasoning appears most heavily in the Diagnosis and Treatment domain (22%) and the Assessment domain. Vignettes present patients with overlapping features and ask you to identify the most likely diagnosis, or they present a treatment question where the correct answer depends on getting the diagnosis right first. The Scientific Foundation domain tests your knowledge of diagnostic criteria, specifiers, and the clinical features that distinguish conditions.
AANPCB PMHNP-C: Diagnostic reasoning concentrates in the Diagnose domain and the Assess domain. The Assess domain tests whether you can gather the right information — the history questions, screening tools, and collateral sources that support accurate diagnosis. The Diagnose domain tests whether you can synthesize that information into the correct diagnosis and differential.
On both exams, the pattern is consistent: a clinical vignette presents a patient who could have more than one diagnosis. Your job is to find the distinguishing features in the vignette — timeline, symptom quality, longitudinal pattern, treatment response — and reason to the best answer. Criteria recall is necessary but not sufficient. Clinical application is what separates passing from failing.
Depressive Disorders
Depressive disorders are among the most frequently tested diagnostic categories on PMHNP boards. The key clinical distinctions involve duration (MDD vs persistent depressive disorder), age-specific presentations (DMDD in children), and the critical rule-out of bipolar depression before starting antidepressant monotherapy.
| Diagnosis | Page |
|---|---|
| Major Depressive Disorder | Major Depressive Disorder → |
| Persistent Depressive Disorder | Persistent Depressive Disorder → |
Bipolar & Related Disorders
Bipolar disorders are high-yield because misdiagnosis has direct treatment consequences — antidepressant monotherapy in unrecognized bipolar disorder can trigger mania. Board questions test your ability to distinguish bipolar I from bipolar II, recognize mixed features, and identify cyclothymia.
| Diagnosis | Page |
|---|---|
| Bipolar I Disorder | Bipolar I Disorder → |
| Bipolar II Disorder | Bipolar II Disorder → |
| Cyclothymic Disorder | Coming soon |
Anxiety Disorders
Anxiety disorders are tested heavily because they are the most common psychiatric conditions in clinical practice and because the differentials within this category (GAD vs panic disorder, social anxiety vs avoidant PD) are clinically important and frequently confused.
| Diagnosis | Page |
|---|---|
| Generalized Anxiety Disorder | Generalized Anxiety Disorder → |
| Panic Disorder | Panic Disorder → |
| Social Anxiety Disorder | Social Anxiety Disorder → |
| Specific Phobia | Coming soon |
| Agoraphobia | Coming soon |
Ready to test your diagnostic knowledge?
Build a custom quiz focused on the diagnoses and differentials you find most challenging. Track which criteria you miss, identify your weak spots, and build a weekly study plan around them.
Trauma- & Stressor-Related Disorders
Trauma-related disorders are tested through timeline-based reasoning. The PTSD vs acute stress disorder differential hinges on the 1-month boundary. Adjustment disorders are distinguished by the presence of a stressor and the absence of full criteria for another diagnosis.
| Diagnosis | Page |
|---|---|
| Post-Traumatic Stress Disorder | Post-Traumatic Stress Disorder → |
| Acute Stress Disorder | Acute Stress Disorder → |
| Adjustment Disorders | Adjustment Disorders → |
| Reactive Attachment Disorder | Reactive Attachment Disorder → |
Obsessive-Compulsive & Related Disorders
OCD and related disorders are high-yield because of the ego-dystonic vs ego-syntonic distinction that separates OCD from OCPD, and because treatment (SSRI + CBT/ERP) differs meaningfully from other anxiety-spectrum conditions.
| Diagnosis | Page |
|---|---|
| Obsessive-Compulsive Disorder | Obsessive-Compulsive Disorder → |
| Body Dysmorphic Disorder | Coming soon |
Psychotic Disorders
Psychotic disorders require longitudinal reasoning that goes beyond a single cross-sectional evaluation. The schizophrenia vs schizoaffective differential depends on how mood symptoms relate to psychosis across the total illness course — one of the most commonly tested clinical reasoning patterns.
| Diagnosis | Page |
|---|---|
| Schizophrenia | Schizophrenia → |
| Schizoaffective Disorder | Schizoaffective Disorder → |
| Brief Psychotic Disorder | Coming soon |
Personality Disorders
Personality disorders are tested because they commonly co-occur with Axis I conditions and because the differentials (BPD vs bipolar, avoidant PD vs social anxiety) are clinically significant. The pervasiveness, ego-syntonicity, and early-onset pattern of personality disorders distinguish them from episodic conditions.
| Diagnosis | Group | Page |
|---|---|---|
| Borderline Personality Disorder | Cluster B | Borderline Personality Disorder → |
| Antisocial Personality Disorder | Cluster B | Antisocial Personality Disorder → |
| Narcissistic Personality Disorder | Cluster B | Coming soon |
| Avoidant Personality Disorder | Cluster C | Coming soon |
Neurodevelopmental Disorders
ADHD is one of the most commonly tested diagnoses on PMHNP boards, both for diagnostic criteria and pharmacology (stimulants vs non-stimulants). Autism spectrum disorder and intellectual disability appear in differential diagnosis questions and in questions about comorbid psychiatric treatment.
| Diagnosis | Page |
|---|---|
| Attention-Deficit/Hyperactivity Disorder | Attention-Deficit/Hyperactivity Disorder → |
| Autism Spectrum Disorder | Autism Spectrum Disorder → |
| Intellectual Disability | Coming soon |
Disruptive, Impulse-Control & Conduct Disorders
These disorders are tested primarily in the context of child and adolescent psychiatry. The ODD vs conduct disorder distinction and the DMDD vs bipolar differential in children are frequently assessed. Treatment involves both behavioral interventions and, in some cases, pharmacologic management of aggression.
| Diagnosis | Page |
|---|---|
| Disruptive Mood Dysregulation Disorder | Disruptive Mood Dysregulation Disorder → |
| Oppositional Defiant Disorder | Oppositional Defiant Disorder → |
| Conduct Disorder | Conduct Disorder → |
| Intermittent Explosive Disorder | Intermittent Explosive Disorder → |
Eating Disorders
Eating disorders are tested for diagnostic criteria (the distinctions between anorexia, bulimia, and binge eating disorder), medical complications, and treatment approaches. Board questions often involve recognizing the medical severity of eating disorders and knowing when to involve medical stabilization.
| Diagnosis | Page |
|---|---|
| Anorexia Nervosa | Coming soon |
| Bulimia Nervosa | Coming soon |
| Binge Eating Disorder | Coming soon |
Substance Use Disorders
Substance use disorders are high-yield for pharmacology (buprenorphine, naltrexone, disulfiram) and for the differential between substance-induced mood/psychotic disorders and primary psychiatric conditions. Understanding when psychiatric symptoms are substance-related vs independent is a key clinical reasoning skill.
| Diagnosis | Page |
|---|---|
| Alcohol Use Disorder | Alcohol Use Disorder → |
| Opioid Use Disorder | Opioid Use Disorder → |
| Stimulant Use Disorder | Stimulant Use Disorder → |
| Cannabis Use Disorder | Coming soon |
Sleep-Wake Disorders
Insomnia is the most commonly tested sleep disorder, particularly in the context of treatment selection (CBT-I as first-line, when to use pharmacotherapy) and the relationship between sleep disorders and psychiatric comorbidities.
| Diagnosis | Page |
|---|---|
| Insomnia Disorder | Insomnia Disorder → |
Neurocognitive Disorders
Neurocognitive disorders are tested for the delirium vs dementia differential (acute vs chronic onset, fluctuating vs stable course) and for medication management (cholinesterase inhibitors, avoiding anticholinergic burden). The psychosis vs delirium differential is also high-yield.
| Diagnosis | Page |
|---|---|
| Major Neurocognitive Disorder (Dementia) | Major Neurocognitive Disorder (Dementia) → |
| Delirium | Delirium → |
How to Study Psychiatric Diagnoses for Boards and Practice
Studying diagnoses for boards is different from studying them in a textbook. The goal is not to memorize every criterion for every condition. The goal is to build the clinical reasoning skills that let you apply diagnostic criteria to ambiguous presentations under time pressure.
Study in layers. Start with the essential features — the 2–3 criteria or features that define a condition and separate it from look-alikes. Then learn the clinical features that affect treatment: onset, course, comorbidities, medication response. Then study the differentials for that condition. This layered approach builds clinical reasoning, not just recognition.
Practice with vignettes. The diagnosis pages include practice questions with clinical vignettes. Use them. Reading criteria is passive; answering questions that force you to apply criteria to a patient presentation is active learning. When you get a question wrong, go back to the diagnosis page and identify what you missed.
Connect diagnoses to treatments. Board questions frequently test whether you can connect the correct diagnosis to the correct treatment. Every diagnosis page links to the relevant medications. Learn the diagnosis and the first-line treatment together — they are always tested together.
Track your weak spots. The diagnoses you get wrong repeatedly are the ones worth spending extra time on. Use the quiz builder to focus on specific categories, and use the flashcard system to reinforce the key features and distinctions.
Connect Diagnoses to the Rest of Your Clinical Reasoning Toolkit
Diagnostic knowledge connects to every other clinical reasoning skill you are building:
Differential diagnosis pages compare two commonly confused conditions side-by-side, with clinical anchors, board traps, and practice questions. Start here when you keep mixing up two diagnoses. → Differential Diagnosis Guide
Medication pages cover the pharmacologic details that diagnosis questions often hinge on — which medication works for which condition, and what happens when you choose the wrong one. → Psychopharmacology Guide
Practice questions test your ability to apply diagnostic reasoning under timed conditions. The quiz builder lets you filter by diagnostic category so you can focus on the areas you find most challenging. → Quiz Builder
Flashcards reinforce the key criteria, clinical features, and treatment connections for each diagnosis. → Flashcard Library
Exam guides show you how diagnostic knowledge fits into the broader content domains on your specific certification exam. → ANCC Exam Guide · AANPCB Exam Guide
Frequently Asked Questions
What psychiatric diagnoses are tested on the PMHNP board exam?
Both the ANCC PMHNP-BC and AANPCB PMHNP-C exams test across the full DSM-5-TR spectrum, but some categories are disproportionately represented. High-yield categories include depressive disorders, bipolar disorders, anxiety disorders, psychotic disorders, ADHD and neurodevelopmental disorders, substance use disorders, and personality disorders (especially borderline and antisocial). Trauma- and stressor-related disorders, eating disorders, and neurocognitive disorders also appear regularly. The exam tests not just criteria recall but clinical application — choosing the right diagnosis for an ambiguous presentation and understanding how the diagnosis changes the treatment plan.
How should I study psychiatric diagnoses for boards?
Study diagnoses in layers. First, learn the essential diagnostic criteria — the features that define the condition and distinguish it from look-alikes. Second, learn the clinical features that affect treatment decisions — onset patterns, course, comorbidities, and the specific medications indicated. Third, study differentials — which conditions share overlapping features and how to tell them apart. Fourth, practice with board-style questions that test clinical application rather than criteria recall. The diagnosis pages on this site are structured in this layered format so you can build understanding progressively.
What is the difference between DSM-5 and DSM-5-TR for PMHNP boards?
The DSM-5-TR (Text Revision, 2022) updated the descriptive text and diagnostic codes for many disorders but made very few changes to the actual diagnostic criteria. The most notable change was the addition of Prolonged Grief Disorder as a new diagnosis. For PMHNP board preparation, the diagnostic criteria you study are virtually identical between DSM-5 and DSM-5-TR. Current board exams align with DSM-5-TR terminology and codes.
Do I need to memorize DSM criteria word for word?
No. Board exams test clinical application, not verbatim criteria recall. You need to know the essential features that define each diagnosis — the criteria that distinguish it from other conditions and the features that change management. For example, you do not need to recite all nine MDD criteria, but you do need to know that 5 of 9 symptoms for 2+ weeks with depressed mood or anhedonia is required, and that the distinction from bipolar depression depends on lifetime mania/hypomania history. Focus on the criteria that have clinical and diagnostic implications.
How are diagnoses connected to medications on the exam?
Diagnosis and pharmacology are deeply intertwined on PMHNP boards. Treatment questions often hinge on getting the diagnosis right first — prescribing an SSRI for unipolar depression is correct, but prescribing an SSRI monotherapy for bipolar depression is a board trap. Each diagnosis page on this site links to the relevant medications, and each medication page links back to the diagnoses it treats. This cross-linking mirrors how board questions work: the diagnosis determines the medication class, and the medication choice refines based on patient-specific factors.