NR547 Week 4 Midterm Exam | Differential Diagnosis PMHNP Chamberlain University | 2026/2027 Edition
WEEK 4 MIDTERM EXAM: NR547 / NR-547 (LATEST
)
DIFFERENTIAL DIAGNOSIS IN
PSYCHIATRIC-MENTAL HEALTH ACROSS THE
LIFESPAN PRACTICUM
Review Questions and Answers | 100% Correct | Grade A | Chamberlain University
Examination Overview: This comprehensive 120-question midterm review examination is aligned with
the Chamberlain University NR 547 Course Syllabus, AACN Essentials of Master's Education, and
Psychiatric-Mental Health Nurse Practitioner (PMHNP) Differential Diagnosis Competencies (2026/2027
Edition). The examination evaluates mastery across eight domains: Foundations of Differential Diagnosis;
Mood Disorders; Anxiety, Trauma, & Stressor-Related Disorders; Psychotic Disorders; Substance Use &
Addictive Disorders; Neurocognitive & Neurological Disorders; Child & Adolescent Differential Diagnosis;
and Complex & Comorbid Differential Diagnosis. Cognitive level distribution: 20% recall, 50% application,
30% analysis (clinical reasoning, differential construction, and complex case management).
Approximately 80% of items are scenario-based clinical decision-making questions; 20% are direct
knowledge items. Each item includes the correct answer and a 2-4 sentence rationale grounded in DSM-5
criteria, NR 547 curriculum content, AACN Essentials, and PMHNP differential diagnosis competencies.
Section Domain Items
1 Foundations of PMH Differential Diagnosis 15
2 Mood Disorders Differential Diagnosis 20
3 Anxiety, Trauma, & Stressor-Related Disorders 18
4 Psychotic Disorders Differential Diagnosis 18
5 Substance Use & Addictive Disorders 15
6 Neurocognitive & Neurological Differential Diagnosis 15
7 Child & Adolescent Differential Diagnosis 10
8 Complex & Comorbid Differential Diagnosis 9
TOTAL 120
Instructions: For each question, select the SINGLE best answer. Each item is presented with four
options (A-D). The correct answer is marked with *[CORRECT]* and a Correct Answer line is provided.
A rationale explains the correct choice and differentiates incorrect options based on DSM-5 criteria,
clinical reasoning, NR 547 curriculum content, and PMHNP differential diagnosis competencies. Use
this review to reinforce knowledge construction of differentials across the lifespan and to identify
areas requiring further study.
Grade A Review - 100% Correct Answers Page 1
,NR547 Week 4 Midterm Exam | Differential Diagnosis PMHNP Chamberlain University | 2026/2027 Edition
Section 1: Foundations of Psychiatric-Mental Health Differential Diagnosis
Q1: A 34-year-old patient presents with vague complaints of fatigue, irritability, and poor
concentration. The PMHNP conducts a comprehensive psychiatric assessment using the
biopsychosocial model. Which domain of inquiry is MOST essential to differentiate a
primary psychiatric disorder from a medical condition mimicking one?
A. Family psychiatric history and genetic loading
B. Recent life stressors and psychosocial functioning
C. Current medications, substance use, and recent medical illnesses *[CORRECT]*
D. Childhood trauma history and attachment patterns
Correct Answer: C
Rationale: A core principle of NR 547 differential diagnosis is ruling out medical, medication, and
substance-induced causes before confirming a primary psychiatric disorder (DSM-5 "due to another
medical condition" and "substance/medication-induced" specifiers). Options A, B, and D are important
for diagnostic formulation and biopsychosocial context but cannot substitute for a thorough medical
rule-out. AACN Master's Essentials emphasize comprehensive assessment including physical status to
avoid the diagnostic error of premature closure.
Q2: A PMHNP interviews a 28-year-old Haitian immigrant who reports "wind in the head"
and fatigue following a family death. The patient denies sadness but describes spiritual
distress. Using the DSM-5 Cultural Formulation Interview (CFI), which action BEST reflects
cultural humility and avoids pathologizing culturally normative experiences?
A. Diagnose persistent depressive disorder because grief exceeds 12 months
B. Apply the cultural concepts of distress module and consult a cultural broker before
finalizing the diagnosis *[CORRECT]*
C. Diagnose adjustment disorder with depressed mood based on symptom count
D. Refer for psychiatric hospitalization due to atypical somatic complaints
Correct Answer: B
Rationale: The DSM-5 CFI and Cultural Concepts of Distress module guide clinicians to assess cultural
meaning, idioms of distress, and help-seeking patterns before assigning a diagnosis. "Wind in the
head" is a culture-bound idiom, not necessarily pathology. Premature diagnosis (A, C) risks diagnostic
overshadowing and cultural bias, while hospitalization (D) is non-indicated. AACN Essentials and
PMHNP competencies require culturally congruent assessment.
Grade A Review - 100% Correct Answers Page 2
,NR547 Week 4 Midterm Exam | Differential Diagnosis PMHNP Chamberlain University | 2026/2027 Edition
Q3: During a mental status examination, a 45-year-old patient demonstrates fluent speech
with frequent paraphasic errors, impaired repetition, and preserved comprehension. This
presentation localizes to which neuroanatomical region and suggests which differential
diagnosis consideration?
A. Broca's area; consider expressive aphasia due to depression
B. Wernicke's area; rule out stroke, tumor, or seizure before psychiatric diagnosis
*[CORRECT]*
C. Prefrontal cortex; consistent with thought disorder in schizophrenia
D. Temporal lobe; diagnostic of dissociative disorder
Correct Answer: B
Rationale: Fluent speech with paraphasic errors and impaired repetition but preserved
comprehension localizes to Wernicke's area (posterior superior temporal gyrus). This is a neurological
finding requiring medical workup (CT/MRI, EEG) to rule out stroke, tumor, or post-ictal state before
psychiatric differential diagnosis. Misattributing aphasia to a thought disorder (C) is a classic
diagnostic error. The MSE is foundational to NR 547 differential reasoning.
Q4: A 52-year-old patient with schizophrenia and type 2 diabetes presents with worsening
psychosis. The treatment team attributes new-onset confusion to "decompensation"
without checking glucose or vital signs. This scenario BEST illustrates which cognitive bias
with significant diagnostic safety implications?
A. Anchoring bias
B. Diagnostic overshadowing *[CORRECT]*
C. Search-satisficing
D. Availability heuristic
Correct Answer: B
Rationale: Diagnostic overshadowing occurs when a clinician attributes new symptoms to an existing
diagnosis (here, schizophrenia) without completing the differential, missing treatable conditions like
hypoglycemia, delirium, or infection. Anchoring (A) is over-reliance on initial impression;
search-satisficing (C) is stopping the search prematurely after one finding; availability (D) is
overestimating probability of easily recalled diagnoses. NR 547 emphasizes recognizing these biases to
reduce diagnostic errors, per PMHNP safety competencies.
Grade A Review - 100% Correct Answers Page 3
, NR547 Week 4 Midterm Exam | Differential Diagnosis PMHNP Chamberlain University | 2026/2027 Edition
Q5: A PMHNP documents "Patient has MDD" without supporting criteria, severity,
specifiers, or differential ruled out. Which documentation principle of NR 547 does this
MOST violate, and what is the appropriate improvement?
A. Lacks billing codes; add ICD-10 and CPT codes
B. Lacks diagnostic reasoning; document DSM-5 criteria met, severity, specifiers, and
rule-outs considered *[CORRECT]*
C. Lacks patient signature; obtain consent for diagnosis
D. Lacks treatment plan; add medication orders
Correct Answer: B
Rationale: AACN Essentials and PMHNP competencies require diagnostic formulations to include
criteria met, severity, specifiers (e.g., with melancholic features, peripartum onset), and the
differential considered (rule-outs). Diagnostic documentation supports clinical reasoning,
communication, and quality care. While billing codes (A) and treatment plans (D) are also important,
they are downstream of diagnostic reasoning. The clinical formulation is the foundation.
Q6: A 19-year-old college student presents with first-episode hallucinations after 2 weeks of
sleep deprivation during finals. The PMHNP considers brief psychotic disorder versus
substance-induced or medical causes. Which sequencing of differential diagnosis steps
reflects best-practice clinical reasoning?
A. Confirm psychosis using PANSS, then refer for psychiatric medication evaluation
B. Rule out substance use and medical causes, assess duration and triggers, then consider
DSM-5 primary psychotic disorder if criteria persist *[CORRECT]*
C. Diagnose brief psychotic disorder immediately due to acute stressor
D. Treat empirically with antipsychotics and reassess in 6 weeks
Correct Answer: B
Rationale: The differential diagnosis algorithm in NR 547 requires ruling out substance-induced (e.g.,
stimulant use) and medical causes (e.g., infection, sleep deprivation-induced psychosis, delirium)
before assigning a primary psychotic disorder. Duration criteria and precipitants distinguish brief
psychotic disorder (<1 month) from schizophreniform (1-6 months) and schizophrenia (>6 months).
Empiric treatment (D) without workup violates diagnostic safety. PANSS (A) quantifies severity but
does not establish etiology.
Grade A Review - 100% Correct Answers Page 4
WEEK 4 MIDTERM EXAM: NR547 / NR-547 (LATEST
)
DIFFERENTIAL DIAGNOSIS IN
PSYCHIATRIC-MENTAL HEALTH ACROSS THE
LIFESPAN PRACTICUM
Review Questions and Answers | 100% Correct | Grade A | Chamberlain University
Examination Overview: This comprehensive 120-question midterm review examination is aligned with
the Chamberlain University NR 547 Course Syllabus, AACN Essentials of Master's Education, and
Psychiatric-Mental Health Nurse Practitioner (PMHNP) Differential Diagnosis Competencies (2026/2027
Edition). The examination evaluates mastery across eight domains: Foundations of Differential Diagnosis;
Mood Disorders; Anxiety, Trauma, & Stressor-Related Disorders; Psychotic Disorders; Substance Use &
Addictive Disorders; Neurocognitive & Neurological Disorders; Child & Adolescent Differential Diagnosis;
and Complex & Comorbid Differential Diagnosis. Cognitive level distribution: 20% recall, 50% application,
30% analysis (clinical reasoning, differential construction, and complex case management).
Approximately 80% of items are scenario-based clinical decision-making questions; 20% are direct
knowledge items. Each item includes the correct answer and a 2-4 sentence rationale grounded in DSM-5
criteria, NR 547 curriculum content, AACN Essentials, and PMHNP differential diagnosis competencies.
Section Domain Items
1 Foundations of PMH Differential Diagnosis 15
2 Mood Disorders Differential Diagnosis 20
3 Anxiety, Trauma, & Stressor-Related Disorders 18
4 Psychotic Disorders Differential Diagnosis 18
5 Substance Use & Addictive Disorders 15
6 Neurocognitive & Neurological Differential Diagnosis 15
7 Child & Adolescent Differential Diagnosis 10
8 Complex & Comorbid Differential Diagnosis 9
TOTAL 120
Instructions: For each question, select the SINGLE best answer. Each item is presented with four
options (A-D). The correct answer is marked with *[CORRECT]* and a Correct Answer line is provided.
A rationale explains the correct choice and differentiates incorrect options based on DSM-5 criteria,
clinical reasoning, NR 547 curriculum content, and PMHNP differential diagnosis competencies. Use
this review to reinforce knowledge construction of differentials across the lifespan and to identify
areas requiring further study.
Grade A Review - 100% Correct Answers Page 1
,NR547 Week 4 Midterm Exam | Differential Diagnosis PMHNP Chamberlain University | 2026/2027 Edition
Section 1: Foundations of Psychiatric-Mental Health Differential Diagnosis
Q1: A 34-year-old patient presents with vague complaints of fatigue, irritability, and poor
concentration. The PMHNP conducts a comprehensive psychiatric assessment using the
biopsychosocial model. Which domain of inquiry is MOST essential to differentiate a
primary psychiatric disorder from a medical condition mimicking one?
A. Family psychiatric history and genetic loading
B. Recent life stressors and psychosocial functioning
C. Current medications, substance use, and recent medical illnesses *[CORRECT]*
D. Childhood trauma history and attachment patterns
Correct Answer: C
Rationale: A core principle of NR 547 differential diagnosis is ruling out medical, medication, and
substance-induced causes before confirming a primary psychiatric disorder (DSM-5 "due to another
medical condition" and "substance/medication-induced" specifiers). Options A, B, and D are important
for diagnostic formulation and biopsychosocial context but cannot substitute for a thorough medical
rule-out. AACN Master's Essentials emphasize comprehensive assessment including physical status to
avoid the diagnostic error of premature closure.
Q2: A PMHNP interviews a 28-year-old Haitian immigrant who reports "wind in the head"
and fatigue following a family death. The patient denies sadness but describes spiritual
distress. Using the DSM-5 Cultural Formulation Interview (CFI), which action BEST reflects
cultural humility and avoids pathologizing culturally normative experiences?
A. Diagnose persistent depressive disorder because grief exceeds 12 months
B. Apply the cultural concepts of distress module and consult a cultural broker before
finalizing the diagnosis *[CORRECT]*
C. Diagnose adjustment disorder with depressed mood based on symptom count
D. Refer for psychiatric hospitalization due to atypical somatic complaints
Correct Answer: B
Rationale: The DSM-5 CFI and Cultural Concepts of Distress module guide clinicians to assess cultural
meaning, idioms of distress, and help-seeking patterns before assigning a diagnosis. "Wind in the
head" is a culture-bound idiom, not necessarily pathology. Premature diagnosis (A, C) risks diagnostic
overshadowing and cultural bias, while hospitalization (D) is non-indicated. AACN Essentials and
PMHNP competencies require culturally congruent assessment.
Grade A Review - 100% Correct Answers Page 2
,NR547 Week 4 Midterm Exam | Differential Diagnosis PMHNP Chamberlain University | 2026/2027 Edition
Q3: During a mental status examination, a 45-year-old patient demonstrates fluent speech
with frequent paraphasic errors, impaired repetition, and preserved comprehension. This
presentation localizes to which neuroanatomical region and suggests which differential
diagnosis consideration?
A. Broca's area; consider expressive aphasia due to depression
B. Wernicke's area; rule out stroke, tumor, or seizure before psychiatric diagnosis
*[CORRECT]*
C. Prefrontal cortex; consistent with thought disorder in schizophrenia
D. Temporal lobe; diagnostic of dissociative disorder
Correct Answer: B
Rationale: Fluent speech with paraphasic errors and impaired repetition but preserved
comprehension localizes to Wernicke's area (posterior superior temporal gyrus). This is a neurological
finding requiring medical workup (CT/MRI, EEG) to rule out stroke, tumor, or post-ictal state before
psychiatric differential diagnosis. Misattributing aphasia to a thought disorder (C) is a classic
diagnostic error. The MSE is foundational to NR 547 differential reasoning.
Q4: A 52-year-old patient with schizophrenia and type 2 diabetes presents with worsening
psychosis. The treatment team attributes new-onset confusion to "decompensation"
without checking glucose or vital signs. This scenario BEST illustrates which cognitive bias
with significant diagnostic safety implications?
A. Anchoring bias
B. Diagnostic overshadowing *[CORRECT]*
C. Search-satisficing
D. Availability heuristic
Correct Answer: B
Rationale: Diagnostic overshadowing occurs when a clinician attributes new symptoms to an existing
diagnosis (here, schizophrenia) without completing the differential, missing treatable conditions like
hypoglycemia, delirium, or infection. Anchoring (A) is over-reliance on initial impression;
search-satisficing (C) is stopping the search prematurely after one finding; availability (D) is
overestimating probability of easily recalled diagnoses. NR 547 emphasizes recognizing these biases to
reduce diagnostic errors, per PMHNP safety competencies.
Grade A Review - 100% Correct Answers Page 3
, NR547 Week 4 Midterm Exam | Differential Diagnosis PMHNP Chamberlain University | 2026/2027 Edition
Q5: A PMHNP documents "Patient has MDD" without supporting criteria, severity,
specifiers, or differential ruled out. Which documentation principle of NR 547 does this
MOST violate, and what is the appropriate improvement?
A. Lacks billing codes; add ICD-10 and CPT codes
B. Lacks diagnostic reasoning; document DSM-5 criteria met, severity, specifiers, and
rule-outs considered *[CORRECT]*
C. Lacks patient signature; obtain consent for diagnosis
D. Lacks treatment plan; add medication orders
Correct Answer: B
Rationale: AACN Essentials and PMHNP competencies require diagnostic formulations to include
criteria met, severity, specifiers (e.g., with melancholic features, peripartum onset), and the
differential considered (rule-outs). Diagnostic documentation supports clinical reasoning,
communication, and quality care. While billing codes (A) and treatment plans (D) are also important,
they are downstream of diagnostic reasoning. The clinical formulation is the foundation.
Q6: A 19-year-old college student presents with first-episode hallucinations after 2 weeks of
sleep deprivation during finals. The PMHNP considers brief psychotic disorder versus
substance-induced or medical causes. Which sequencing of differential diagnosis steps
reflects best-practice clinical reasoning?
A. Confirm psychosis using PANSS, then refer for psychiatric medication evaluation
B. Rule out substance use and medical causes, assess duration and triggers, then consider
DSM-5 primary psychotic disorder if criteria persist *[CORRECT]*
C. Diagnose brief psychotic disorder immediately due to acute stressor
D. Treat empirically with antipsychotics and reassess in 6 weeks
Correct Answer: B
Rationale: The differential diagnosis algorithm in NR 547 requires ruling out substance-induced (e.g.,
stimulant use) and medical causes (e.g., infection, sleep deprivation-induced psychosis, delirium)
before assigning a primary psychotic disorder. Duration criteria and precipitants distinguish brief
psychotic disorder (<1 month) from schizophreniform (1-6 months) and schizophrenia (>6 months).
Empiric treatment (D) without workup violates diagnostic safety. PANSS (A) quantifies severity but
does not establish etiology.
Grade A Review - 100% Correct Answers Page 4
