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The NR 547 PMHNP exam, part of Chamberlain University's MSN program,
focuses on differential diagnosis in psychiatric-mental health across the lifespan. It
assesses competencies in psychiatric assessment, DSM-5-TR diagnostic criteria,
psychopharmacology, and clinical reasoning. The exam includes midterm, final,
and Clinical Evaluation Assessment (CEA) components, with multiple-choice
questions requiring the selection of the single best answer. This question bank
provides 300 unique practice questions with detailed rationales to help you master
advanced psychiatric concepts and strengthen clinical reasoning for midterm and
final examinations.
Section 1: Differential Diagnosis Process and Clinical Assessment
(Questions 1-60)
Question 1
A PMHNP is conducting an initial psychiatric evaluation. Which of the following
best describes the primary purpose of the differential diagnosis process?
A. To confirm the patient's self-reported diagnosis
B. To develop a working list of potential disorders that could explain the patient's
symptoms
C. To rule out all medical causes before considering any mental health diagnosis
D. To assign a single diagnosis that will guide all future treatment decisions
Correct Answer: B
Rationale: Differential diagnosis involves developing a working hypothesis or list
of potential disorders that could account for the presenting symptoms. This list is
prioritized, and each potential diagnosis is systematically ruled in or out based on
diagnostic criteria, history, and assessment findings.
Question 2
,What is the first step a PMHNP should take when building a differential diagnosis
before considering any medical or psychiatric conditions?
A. Begin treatment with a low-risk medication
B. Rule out malingering or factitious disorder
C. Order a complete metabolic panel
D. Review the patient's family history
Correct Answer: B
Rationale: The initial step in forming a differential diagnosis is to determine if the
patient is intentionally producing symptoms for external gain (malingering) or
internal psychological reasons (factitious disorder). Only after ruling out these
possibilities should the clinician systematically rule out substance-induced
etiologies and then medical/psychiatric conditions.
Question 3
What is the second step in the differential diagnosis process, immediately
following the initial rule-out of factitious presentations?
A. Refer the patient for neuropsychological testing
B. Establish a therapeutic alliance
C. Rule out substance or medication-induced etiology
D. Begin treatment with SSRIs to observe response
Correct Answer: C
Rationale: The second step is to rule out substance or medication-induced etiology,
as many psychiatric symptoms can be directly caused by intoxication, withdrawal,
or adverse effects of prescribed medications, supplements, or illicit drugs.
Question 4
A patient presents with depressed mood. The PMHNP is considering the
hierarchical diagnostic approach. Which condition should be ruled out first before
making a psychiatric diagnosis?
A. Adjustment disorder with depressed mood
B. Substance-induced or medical condition causing depressive symptoms
C. Persistent depressive disorder
D. Major depressive disorder with anxious distress
Correct Answer: B
Rationale: The hierarchical approach requires ruling out substance/medication-
induced disorders and disorders due to another medical condition before primary
psychiatric diagnoses. This follows DSM-5-TR diagnostic principles: if symptoms
are attributable to substance use or medical condition, that diagnosis takes
precedence.
,Question 5
What is a differential diagnosis?
A. The final diagnosis after all testing is complete
B. The provider's initial hypothesis — a working list of potential problems
associated with the chief complaint
C. A treatment plan based on presenting symptoms
D. A medication prescription guideline for psychiatric disorders
Correct Answer: B
Rationale: A differential diagnosis is the provider's initial hypothesis and a
working list of potential problems that can be associated with the initial or chief
complaint. The DSM-5-TR provides guidance for identifying psychiatric
diagnoses. The differential is refined as more information becomes available.
Question 6
What is the primary purpose of the "treat or refer" decision point in clinical
practice for a PMHNP?
A. To discharge patients who are uncooperative with treatment
B. To determine if a patient's condition is within the NP's scope of practice or
requires a higher level of care
C. To decide between pharmacological and non-pharmacological treatment
D. To evaluate if the patient can afford prescribed medications
Correct Answer: B
Rationale: The "treat or refer" decision point is a critical clinical judgment step
where the PMHNP must determine whether a patient's presentation can be safely
managed in the current outpatient setting or if it necessitates referral to a higher
level of care.
Question 7
A PMHNP student is conducting a diagnostic interview. The patient describes
feeling "down" for the past month. Which interviewing technique is most
appropriate to clarify the diagnostic picture?
A. Immediately diagnosing major depressive disorder based on the statement
B. Using open-ended questions followed by clarifying and summarizing to gather
specific symptoms and duration
C. Asking only yes/no questions to speed up the interview
D. Focusing exclusively on family history without exploring current symptoms
Correct Answer: B
Rationale: Effective diagnostic interviewing uses open-ended questions to elicit
narrative, followed by clarifying questions to establish specific symptoms,
duration, and functional impairment. Summarizing ensures accuracy. This
, approach prevents premature diagnosis and ensures DSM-5-TR criteria are
thoroughly evaluated.
Question 8
According to the DSM-5-TR, which of the following must be ruled out before
assigning most psychiatric diagnoses?
A. Childhood trauma history
B. Substance use and other medical conditions
C. Family history of mental illness
D. Recent stressful life events
Correct Answer: B
Rationale: The DSM-5-TR requires clinicians to rule out substance/medication-
induced conditions and other medical conditions as the primary cause of symptoms
before assigning a primary psychiatric diagnosis.
Question 9
During a mental status examination, the PMHNP notes the patient has looseness of
associations, flight of ideas, and tangential responses. Which MSE component is
being assessed?
A. Mood and affect
B. Thought process
C. Thought content
D. Insight and judgment
Correct Answer: B
Rationale: Thought process refers to how a person thinks (form of thought),
including goal-directedness, logical connections, and organization. Looseness of
associations, flight of ideas, tangentiality, circumstantiality, and thought blocking
are all thought process abnormalities.
Question 10
A 28-year-old patient presents with tangential speech, clang associations, and
grossly disorganized behavior during a mental status examination. The PMHNP
recognizes these findings as most consistent with which domain of
psychopathology?
A. Thought process disorder
B. Thought content disorder
C. Perceptual disturbance
D. Sensorium impairment
Correct Answer: A