NR 547 — Differential Diagnosis in Psychiatric-Mental Health across the Lifespan Practicum Week 4 Midterm Exam | 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
Chamberlain University | NR 547 Differential Diagnosis Practicum | Aligned with DSM-5-TR, AACN Essentials, &
PMHNP Competencies (2026/2027 Edition)
Instructions: This midterm examination contains 120 multiple-choice questions distributed across nine (9)
domains reflecting the NR 547 practicum curriculum. Select the single best answer for each item. Cognitive
distribution: ~20% recall, ~50% application, ~30% analysis (clinical reasoning, differential diagnosis, diagnostic
formulation). Approximately 80% of items are scenario-based; 20% assess direct knowledge. Each item includes the
correct answer, marked *[CORRECT]*, and a 2-4 sentence rationale grounded in DSM-5-TR criteria, NR 547 course
content, and evidence-based psychiatric differential diagnosis.
Section 1: Foundations of Psychiatric Differential Diagnosis
Q1: A 34-year-old presents with two weeks of depressed mood, anhedonia, insomnia, and fatigue after
a job loss. The PMHNP is constructing a differential. Which principle most accurately distinguishes a
differential diagnosis from a comorbid condition in DSM-5-TR?
A. A differential diagnosis is another disorder that coexists with the primary disorder and shares symptom
overlap.
B. A comorbid condition must always be ruled out before the primary diagnosis is assigned.
C. A differential diagnosis is an alternative diagnosis that could explain the presenting symptoms
and must be ruled in or out, whereas a comorbid condition is an additional diagnosis that coexists
with the primary diagnosis. *[CORRECT]*
D. Differential diagnoses are reserved for medical etiologies, while comorbidities refer only to psychiatric
conditions.
Correct Answer: C
Rationale: Per DSM-5-TR and NR 547 curriculum, a differential diagnosis represents plausible alternative
explanations of the presenting picture that the clinician systematically rules in or out, while a comorbid condition is
a separate diagnosis that coexists with the primary disorder. Options A and B confuse the terms; option D is
incorrect because differentials may be psychiatric or medical. The rule-out process is the cornerstone of
diagnostic reasoning.
Chamberlain University | Grade A Review Page 1
,NR 547 — Differential Diagnosis in Psychiatric-Mental Health across the Lifespan Practicum Week 4 Midterm Exam | 2026/2027 Edition
Q2: During a structured clinical interview, a PMHNP uses the SCID-5 to evaluate a patient with
suspected bipolar I disorder. Which feature most distinguishes the SCID-5 from the MINI International
Neuropsychiatric Interview in NR 547 practice?
A. The SCID-5 is a brief screening tool used in primary care, while the MINI is comprehensive.
B. The SCID-5 is a comprehensive semi-structured diagnostic interview that maps to DSM-5-TR
criteria, whereas the MINI is a shorter structured interview designed for rapid psychiatric screening
in clinical and research settings. *[CORRECT]*
C. The MINI relies exclusively on patient self-report, while the SCID-5 uses collateral informants only.
D. The SCID-5 cannot be used to diagnose personality disorders, while the MINI can.
Correct Answer: B
Rationale: The SCID-5 is a semi-structured interview that comprehensively assesses DSM-5-TR diagnoses,
including personality disorders (SCID-5-PD), whereas the MINI is a brief, fully structured instrument designed for
efficient screening. The MINI is widely used in research and busy clinical settings due to its brevity (~15-30
minutes) compared to the SCID-5's 60-90 minute administration. Both rely on clinician-administered questions, not
exclusive self-report.
Q3: A PMHNP documents a diagnostic formulation for a 28-year-old with recurrent panic attacks. Which
component is LEAST essential to a complete case conceptualization per NR 547 standards?
A. Biological substrates and familial/genetic contributions.
B. Psychological defenses and coping patterns.
C. Patient's astrological birth chart and numerology profile. *[CORRECT]*
D. Sociocultural context, including family dynamics and cultural identity.
Correct Answer: C
Rationale: A complete case conceptualization per NR 547 integrates the four Ps (predisposing, precipitating,
perpetuating, protective) across biological, psychological, social, and cultural domains. Astrology and numerology
are not evidence-based components of psychiatric formulation. Predisposing factors include genetics and
temperament; precipitating factors involve stressors; perpetuating factors maintain symptoms; protective factors
buffer risk.
Q4: A clinician is assessing a 45-year-old immigrant from Somalia who presents with auditory
hallucinations attributed by the patient to a 'jin' (spiritual possession). Applying the DSM-5-TR Cultural
Formulation Interview (CFI), which action is MOST appropriate?
A. Diagnose schizophrenia immediately since hallucinations are pathognomonic.
B. Disregard cultural explanations and apply Western diagnostic criteria exclusively.
C. Use the CFI to elicit the patient's cultural identity, explanatory model, psychosocial stressors,
and cultural features of the relationship to determine whether the experience is normative within
the cultural context or represents pathology. *[CORRECT]*
D. Refer the patient solely to a faith healer without psychiatric evaluation.
Correct Answer: C
Rationale: The DSM-5-TR Cultural Formulation Interview is a 16-item semi-structured instrument assessing
cultural identity, cultural explanations of distress, psychosocial stressors and supports, and cultural elements of
the clinician-patient relationship. Spiritual or religious experiences that are normative within a culture do not
necessarily indicate pathology. Differential diagnosis requires distinguishing culturally sanctioned experiences
from psychotic disorders using CFI-derived information.
Chamberlain University | Grade A Review Page 2
,NR 547 — Differential Diagnosis in Psychiatric-Mental Health across the Lifespan Practicum Week 4 Midterm Exam | 2026/2027 Edition
Q5: A PMHNP initially diagnoses a patient with major depressive disorder but later discovers the
patient has hyperthyroidism causing the depressive symptoms. Which cognitive bias was the primary
source of this diagnostic error?
A. Anchoring bias — relying too heavily on the initial diagnosis without considering alternative
explanations. *[CORRECT]*
B. Availability bias — overestimating the likelihood of recently encountered cases.
C. Confirmatory bias — seeking only information that supports the working diagnosis.
D. Premature closure — accepting a diagnosis before it has been fully verified.
Correct Answer: A
Rationale: Anchoring bias describes the tendency to fixate on initial features of the presentation and fail to adjust
when new data emerge. While confirmatory bias and premature closure are also relevant, the failure to revise the
diagnosis after discovering hyperthyroidism exemplifies anchoring on the initial depressive presentation. NR 547
emphasizes systematic rule-out of medical mimics (thyroid, B12, folate, infections) before finalizing psychiatric
diagnoses.
Q6: Which of the following scenarios best illustrates the correct application of the DSM-5-TR diagnostic
principle of 'other specified' versus 'unspecified' disorders?
A. A clinician uses 'other specified depressive disorder' when the full criteria are met for major depressive
disorder but the patient declines to provide history.
B. A clinician uses 'other specified bipolar and related disorder' when symptoms cause clinically
significant distress but do not meet full criteria for a named bipolar disorder, AND the clinician
specifies the reason (e.g., short-duration hypomanic episodes); 'unspecified' is used when the
clinician chooses not to specify the reason. *[CORRECT]*
C. Other specified is reserved for children, while unspecified is used only in geriatric populations.
D. Other specified disorders require at least 6 months of symptoms; unspecified disorders do not.
Correct Answer: B
Rationale: Per DSM-5-TR, 'other specified' is used when symptoms cause clinically significant
distress/impairment but do not meet full criteria for a named disorder, and the clinician documents the specific
reason (e.g., 'short-duration hypomanic episodes' [2-3 days]). 'Unspecified' is used in situations where the
clinician chooses not to specify the reason, often in emergency or insufficient-information contexts. Neither is
restricted by age or symptom duration alone.
Q7: A PMHNP completes a diagnostic evaluation and now must select an ICD-10-CM code. Which
statement accurately reflects the relationship between DSM-5-TR and ICD-10-CM coding?
A. DSM-5-TR codes are entirely independent of ICD-10-CM, and clinicians use whichever they prefer.
B. DSM-5-TR diagnostic codes correspond to ICD-10-CM codes, and clinicians must use the
ICD-10-CM code for billing and reporting purposes in the United States. *[CORRECT]*
C. ICD-10-CM codes are used only for medical conditions, while DSM-5-TR codes are for psychiatric
diagnoses.
D. ICD-10-CM is being phased out and replaced by DSM-5-TR codes for billing.
Correct Answer: B
Rationale: In the United States, DSM-5-TR includes ICD-10-CM codes (e.g., F33.1 for MDD, recurrent,
moderate) because ICD-10-CM is the official coding system required for billing, claims, and HIPAA-compliant
reporting. DSM-5-TR provides the diagnostic criteria while ICD-10-CM provides the administrative code. They are
complementary, not competing systems.
Chamberlain University | Grade A Review Page 3
, NR 547 — Differential Diagnosis in Psychiatric-Mental Health across the Lifespan Practicum Week 4 Midterm Exam | 2026/2027 Edition
Q8: Which of the following best demonstrates appropriate diagnostic documentation per NR 547
standards?
A. 'Patient appears depressed. Will start SSRI and re-evaluate in 4 weeks.'
B. A written formulation including chief complaint, HPI, psychiatric MSE, pertinent
positives/negatives, rule-outs considered, working diagnosis with DSM-5-TR criteria support,
ICD-10-CM code, severity/specifiers, and rationale for excluding alternative diagnoses.
*[CORRECT]*
C. 'Patient meets criteria for bipolar disorder based on clinical impression.'
D. 'Diagnosis deferred pending pharmacy consult.'
Correct Answer: B
Rationale: NR 547 documentation standards require a complete psychiatric evaluation with rationale for the
diagnosis, including which DSM-5-TR criteria are met, severity specifiers, rule-outs considered and excluded (with
reasoning), and the corresponding ICD-10-CM code. Vague or unsupported diagnoses are inadequate for clinical
care, billing, and legal documentation. The MSE, HPI, and risk assessment must all be reflected.
Q9: A 22-year-old college student presents with new-onset auditory hallucinations. The PMHNP is
forming a differential. Which statement reflects the BEST diagnostic reasoning approach?
A. Diagnose schizophrenia immediately based on the presence of hallucinations.
B. Consider substance intoxication/withdrawal, medical conditions (e.g., temporal lobe epilepsy,
encephalitis), brief psychotic disorder, schizophreniform, mood disorder with psychotic features,
and schizophrenia, then systematically rule out based on duration, substance use history, medical
workup, and mood symptom timeline. *[CORRECT]*
C. Prescribe an antipsychotic and observe response to confirm the diagnosis.
D. Diagnose psychosis NOS without further workup.
Correct Answer: B
Rationale: Best practice in differential diagnosis requires generating a comprehensive differential that includes
substance-induced psychosis, psychosis due to a medical condition, mood disorders with psychotic features, brief
psychotic disorder, schizophreniform, and schizophrenia, then systematically ruling out alternatives based on
symptom duration (<1 month suggests brief psychotic disorder; 1-6 months suggests schizophreniform; >6
months suggests schizophrenia), substance use, and medical workup. Diagnostic trial of antipsychotics is not a
substitute for proper differential reasoning.
Q10: Which rating scale is MOST appropriate for systematically documenting baseline and serial
severity of psychotic symptoms in a patient with schizophrenia?
A. PHQ-9 (Patient Health Questionnaire-9)
B. GAD-7 (Generalized Anxiety Disorder-7)
C. PANSS (Positive and Negative Syndrome Scale) *[CORRECT]*
D. YMRS (Young Mania Rating Scale)
Correct Answer: C
Rationale: The PANSS (Positive and Negative Syndrome Scale) is a 30-item clinician-rated instrument
specifically designed to assess positive, negative, and general psychopathology in schizophrenia. PHQ-9
measures depression, GAD-7 measures anxiety, and YMRS measures mania. The BPRS (Brief Psychiatric
Rating Scale) is another valid option for psychosis severity but is less comprehensive than the PANSS.
Chamberlain University | Grade A Review 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
Chamberlain University | NR 547 Differential Diagnosis Practicum | Aligned with DSM-5-TR, AACN Essentials, &
PMHNP Competencies (2026/2027 Edition)
Instructions: This midterm examination contains 120 multiple-choice questions distributed across nine (9)
domains reflecting the NR 547 practicum curriculum. Select the single best answer for each item. Cognitive
distribution: ~20% recall, ~50% application, ~30% analysis (clinical reasoning, differential diagnosis, diagnostic
formulation). Approximately 80% of items are scenario-based; 20% assess direct knowledge. Each item includes the
correct answer, marked *[CORRECT]*, and a 2-4 sentence rationale grounded in DSM-5-TR criteria, NR 547 course
content, and evidence-based psychiatric differential diagnosis.
Section 1: Foundations of Psychiatric Differential Diagnosis
Q1: A 34-year-old presents with two weeks of depressed mood, anhedonia, insomnia, and fatigue after
a job loss. The PMHNP is constructing a differential. Which principle most accurately distinguishes a
differential diagnosis from a comorbid condition in DSM-5-TR?
A. A differential diagnosis is another disorder that coexists with the primary disorder and shares symptom
overlap.
B. A comorbid condition must always be ruled out before the primary diagnosis is assigned.
C. A differential diagnosis is an alternative diagnosis that could explain the presenting symptoms
and must be ruled in or out, whereas a comorbid condition is an additional diagnosis that coexists
with the primary diagnosis. *[CORRECT]*
D. Differential diagnoses are reserved for medical etiologies, while comorbidities refer only to psychiatric
conditions.
Correct Answer: C
Rationale: Per DSM-5-TR and NR 547 curriculum, a differential diagnosis represents plausible alternative
explanations of the presenting picture that the clinician systematically rules in or out, while a comorbid condition is
a separate diagnosis that coexists with the primary disorder. Options A and B confuse the terms; option D is
incorrect because differentials may be psychiatric or medical. The rule-out process is the cornerstone of
diagnostic reasoning.
Chamberlain University | Grade A Review Page 1
,NR 547 — Differential Diagnosis in Psychiatric-Mental Health across the Lifespan Practicum Week 4 Midterm Exam | 2026/2027 Edition
Q2: During a structured clinical interview, a PMHNP uses the SCID-5 to evaluate a patient with
suspected bipolar I disorder. Which feature most distinguishes the SCID-5 from the MINI International
Neuropsychiatric Interview in NR 547 practice?
A. The SCID-5 is a brief screening tool used in primary care, while the MINI is comprehensive.
B. The SCID-5 is a comprehensive semi-structured diagnostic interview that maps to DSM-5-TR
criteria, whereas the MINI is a shorter structured interview designed for rapid psychiatric screening
in clinical and research settings. *[CORRECT]*
C. The MINI relies exclusively on patient self-report, while the SCID-5 uses collateral informants only.
D. The SCID-5 cannot be used to diagnose personality disorders, while the MINI can.
Correct Answer: B
Rationale: The SCID-5 is a semi-structured interview that comprehensively assesses DSM-5-TR diagnoses,
including personality disorders (SCID-5-PD), whereas the MINI is a brief, fully structured instrument designed for
efficient screening. The MINI is widely used in research and busy clinical settings due to its brevity (~15-30
minutes) compared to the SCID-5's 60-90 minute administration. Both rely on clinician-administered questions, not
exclusive self-report.
Q3: A PMHNP documents a diagnostic formulation for a 28-year-old with recurrent panic attacks. Which
component is LEAST essential to a complete case conceptualization per NR 547 standards?
A. Biological substrates and familial/genetic contributions.
B. Psychological defenses and coping patterns.
C. Patient's astrological birth chart and numerology profile. *[CORRECT]*
D. Sociocultural context, including family dynamics and cultural identity.
Correct Answer: C
Rationale: A complete case conceptualization per NR 547 integrates the four Ps (predisposing, precipitating,
perpetuating, protective) across biological, psychological, social, and cultural domains. Astrology and numerology
are not evidence-based components of psychiatric formulation. Predisposing factors include genetics and
temperament; precipitating factors involve stressors; perpetuating factors maintain symptoms; protective factors
buffer risk.
Q4: A clinician is assessing a 45-year-old immigrant from Somalia who presents with auditory
hallucinations attributed by the patient to a 'jin' (spiritual possession). Applying the DSM-5-TR Cultural
Formulation Interview (CFI), which action is MOST appropriate?
A. Diagnose schizophrenia immediately since hallucinations are pathognomonic.
B. Disregard cultural explanations and apply Western diagnostic criteria exclusively.
C. Use the CFI to elicit the patient's cultural identity, explanatory model, psychosocial stressors,
and cultural features of the relationship to determine whether the experience is normative within
the cultural context or represents pathology. *[CORRECT]*
D. Refer the patient solely to a faith healer without psychiatric evaluation.
Correct Answer: C
Rationale: The DSM-5-TR Cultural Formulation Interview is a 16-item semi-structured instrument assessing
cultural identity, cultural explanations of distress, psychosocial stressors and supports, and cultural elements of
the clinician-patient relationship. Spiritual or religious experiences that are normative within a culture do not
necessarily indicate pathology. Differential diagnosis requires distinguishing culturally sanctioned experiences
from psychotic disorders using CFI-derived information.
Chamberlain University | Grade A Review Page 2
,NR 547 — Differential Diagnosis in Psychiatric-Mental Health across the Lifespan Practicum Week 4 Midterm Exam | 2026/2027 Edition
Q5: A PMHNP initially diagnoses a patient with major depressive disorder but later discovers the
patient has hyperthyroidism causing the depressive symptoms. Which cognitive bias was the primary
source of this diagnostic error?
A. Anchoring bias — relying too heavily on the initial diagnosis without considering alternative
explanations. *[CORRECT]*
B. Availability bias — overestimating the likelihood of recently encountered cases.
C. Confirmatory bias — seeking only information that supports the working diagnosis.
D. Premature closure — accepting a diagnosis before it has been fully verified.
Correct Answer: A
Rationale: Anchoring bias describes the tendency to fixate on initial features of the presentation and fail to adjust
when new data emerge. While confirmatory bias and premature closure are also relevant, the failure to revise the
diagnosis after discovering hyperthyroidism exemplifies anchoring on the initial depressive presentation. NR 547
emphasizes systematic rule-out of medical mimics (thyroid, B12, folate, infections) before finalizing psychiatric
diagnoses.
Q6: Which of the following scenarios best illustrates the correct application of the DSM-5-TR diagnostic
principle of 'other specified' versus 'unspecified' disorders?
A. A clinician uses 'other specified depressive disorder' when the full criteria are met for major depressive
disorder but the patient declines to provide history.
B. A clinician uses 'other specified bipolar and related disorder' when symptoms cause clinically
significant distress but do not meet full criteria for a named bipolar disorder, AND the clinician
specifies the reason (e.g., short-duration hypomanic episodes); 'unspecified' is used when the
clinician chooses not to specify the reason. *[CORRECT]*
C. Other specified is reserved for children, while unspecified is used only in geriatric populations.
D. Other specified disorders require at least 6 months of symptoms; unspecified disorders do not.
Correct Answer: B
Rationale: Per DSM-5-TR, 'other specified' is used when symptoms cause clinically significant
distress/impairment but do not meet full criteria for a named disorder, and the clinician documents the specific
reason (e.g., 'short-duration hypomanic episodes' [2-3 days]). 'Unspecified' is used in situations where the
clinician chooses not to specify the reason, often in emergency or insufficient-information contexts. Neither is
restricted by age or symptom duration alone.
Q7: A PMHNP completes a diagnostic evaluation and now must select an ICD-10-CM code. Which
statement accurately reflects the relationship between DSM-5-TR and ICD-10-CM coding?
A. DSM-5-TR codes are entirely independent of ICD-10-CM, and clinicians use whichever they prefer.
B. DSM-5-TR diagnostic codes correspond to ICD-10-CM codes, and clinicians must use the
ICD-10-CM code for billing and reporting purposes in the United States. *[CORRECT]*
C. ICD-10-CM codes are used only for medical conditions, while DSM-5-TR codes are for psychiatric
diagnoses.
D. ICD-10-CM is being phased out and replaced by DSM-5-TR codes for billing.
Correct Answer: B
Rationale: In the United States, DSM-5-TR includes ICD-10-CM codes (e.g., F33.1 for MDD, recurrent,
moderate) because ICD-10-CM is the official coding system required for billing, claims, and HIPAA-compliant
reporting. DSM-5-TR provides the diagnostic criteria while ICD-10-CM provides the administrative code. They are
complementary, not competing systems.
Chamberlain University | Grade A Review Page 3
, NR 547 — Differential Diagnosis in Psychiatric-Mental Health across the Lifespan Practicum Week 4 Midterm Exam | 2026/2027 Edition
Q8: Which of the following best demonstrates appropriate diagnostic documentation per NR 547
standards?
A. 'Patient appears depressed. Will start SSRI and re-evaluate in 4 weeks.'
B. A written formulation including chief complaint, HPI, psychiatric MSE, pertinent
positives/negatives, rule-outs considered, working diagnosis with DSM-5-TR criteria support,
ICD-10-CM code, severity/specifiers, and rationale for excluding alternative diagnoses.
*[CORRECT]*
C. 'Patient meets criteria for bipolar disorder based on clinical impression.'
D. 'Diagnosis deferred pending pharmacy consult.'
Correct Answer: B
Rationale: NR 547 documentation standards require a complete psychiatric evaluation with rationale for the
diagnosis, including which DSM-5-TR criteria are met, severity specifiers, rule-outs considered and excluded (with
reasoning), and the corresponding ICD-10-CM code. Vague or unsupported diagnoses are inadequate for clinical
care, billing, and legal documentation. The MSE, HPI, and risk assessment must all be reflected.
Q9: A 22-year-old college student presents with new-onset auditory hallucinations. The PMHNP is
forming a differential. Which statement reflects the BEST diagnostic reasoning approach?
A. Diagnose schizophrenia immediately based on the presence of hallucinations.
B. Consider substance intoxication/withdrawal, medical conditions (e.g., temporal lobe epilepsy,
encephalitis), brief psychotic disorder, schizophreniform, mood disorder with psychotic features,
and schizophrenia, then systematically rule out based on duration, substance use history, medical
workup, and mood symptom timeline. *[CORRECT]*
C. Prescribe an antipsychotic and observe response to confirm the diagnosis.
D. Diagnose psychosis NOS without further workup.
Correct Answer: B
Rationale: Best practice in differential diagnosis requires generating a comprehensive differential that includes
substance-induced psychosis, psychosis due to a medical condition, mood disorders with psychotic features, brief
psychotic disorder, schizophreniform, and schizophrenia, then systematically ruling out alternatives based on
symptom duration (<1 month suggests brief psychotic disorder; 1-6 months suggests schizophreniform; >6
months suggests schizophrenia), substance use, and medical workup. Diagnostic trial of antipsychotics is not a
substitute for proper differential reasoning.
Q10: Which rating scale is MOST appropriate for systematically documenting baseline and serial
severity of psychotic symptoms in a patient with schizophrenia?
A. PHQ-9 (Patient Health Questionnaire-9)
B. GAD-7 (Generalized Anxiety Disorder-7)
C. PANSS (Positive and Negative Syndrome Scale) *[CORRECT]*
D. YMRS (Young Mania Rating Scale)
Correct Answer: C
Rationale: The PANSS (Positive and Negative Syndrome Scale) is a 30-item clinician-rated instrument
specifically designed to assess positive, negative, and general psychopathology in schizophrenia. PHQ-9
measures depression, GAD-7 measures anxiety, and YMRS measures mania. The BPRS (Brief Psychiatric
Rating Scale) is another valid option for psychosis severity but is less comprehensive than the PANSS.
Chamberlain University | Grade A Review Page 4
