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NRNP 6635 Week 8 Comprehensive Psychiatric Evaluation: Complete Guide
The Week 8 Comprehensive Psychiatric Evaluation is the diagnostic-reasoning capstone of NRNP/PRAC 6635: Psychopathology and Diagnostic Reasoning. It is the first assignment in the Walden PMHNP sequence where you are expected to carry a real differential diagnosis from raw clinical data to a justified DSM-5-TR diagnosis and treatment plan, under full rubric scrutiny. This guide breaks down exactly what the assignment is testing, section by section, and where most students lose points.
What This Assignment Is Actually Assessing
Instructors are not grading you on whether you can format a SOAP note. They are grading whether your diagnostic conclusion is defensible — whether someone reading only your History of Present Illness (HPI) and Mental Status Exam (MSE) would arrive at the same differential you did. Three things separate a strong submission from an average one:
- Diagnostic reasoning is shown, not just stated — you explain why you ruled disorders in or out, not just which one you picked
- Every criterion you cite maps to a specific DSM-5-TR criterion, not a paraphrase of the disorder’s general description
- Your treatment plan logically follows from the diagnosis and patient-specific factors (age, comorbidities, prior treatment response), not a generic protocol
Section-by-Section Rubric Breakdown
1. History of Present Illness (HPI)
This section should read like a clinician building a case, not a narrative. Most rubrics expect: onset, duration, course, precipitating factors, and pertinent negatives (symptoms you specifically ruled out). A common point deduction is omitting pertinent negatives — for example, not stating whether the patient denies suicidal ideation when assessing a mood disorder.
2. Mental Status Exam (MSE)
The MSE should cover appearance, behavior, speech, mood, affect, thought process, thought content, perception, cognition, insight, and judgment — in that conventional order. Standardized, structured documentation of these domains is associated with improved diagnostic accuracy and supports defensible clinical records (Norris & Clark, 2024). Avoid restating HPI content here; the MSE is your direct observation at the time of the encounter, not patient-reported history.
3. Differential Diagnosis
List at least three plausible diagnoses and address each one explicitly, even the ones you rule out. For each, state which DSM-5-TR criteria are met, which are not met, and what additional information (if any) would change your conclusion. Overlapping symptom profiles between mood, trauma-related, and other psychiatric presentations make this reasoning step essential rather than optional (Demartini et al., 2023). This is the section most students under-develop — a one-line dismissal of an alternative diagnosis reads as superficial reasoning to a grader.
4. Diagnostic Formulation and Justification
State your primary diagnosis and walk through the specific DSM-5-TR criteria the patient meets, with the corresponding data point from the case (symptom, duration, severity). Cite the DSM-5-TR directly (American Psychiatric Association, 2022) rather than a secondary source describing it. A symptom-count threshold approach — for example, five of nine criteria present nearly daily over a 2-week period for MDD — is the standard structure for this justification (Bains & Abdijadid, 2023).
5. Psychometric or Rating Scale Selection
You are typically expected to justify which screening or rating tool fits the case — not just name one. State what the tool measures, the population it is validated for, its administration format, and why it is appropriate given the patient’s age and presenting symptoms. The PHQ-9, for instance, has well-established validity for adult depression screening across primary care and psychiatric settings, with good sensitivity and specificity against structured diagnostic interviews (Lee et al., 2023).
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6. Psychopharmacological and Treatment Plan
Tie every recommendation back to the diagnosis and patient-specific factors: age, renal/hepatic function if mentioned, comorbidities, prior medication trials, and any contraindications stated in the case. SSRIs remain the recommended first-line option for most adult MDD presentations, but selection among individual SSRIs and alternatives should be informed by patient-specific factors such as comorbidities, prior treatment response, and tolerability rather than a single default agent (Fugger et al., 2022; Kwong et al., 2022). A treatment plan that would suit any patient with that diagnosis, rather than this patient, signals the diagnosis-to-plan link wasn’t actually reasoned through.
7. Ethical and Legal Considerations
Most rubrics require at least one specific consideration relevant to the case — informed consent for a minor, mandatory reporting thresholds, capacity to consent to treatment, or duty to warn — rather than a generic statement that ethics matter.
Where Students Lose the Most Points
- Anchoring on the first diagnosis that fits and under-exploring the differential
- Citing DSM-5-TR criteria from memory instead of the current edition’s exact wording and criterion count
- MSE language that restates HPI symptoms instead of documenting observed status at the encounter
- Treatment plans copied from a textbook protocol with no link back to case-specific patient factors
- APA references older than 5 years, or sourced from non-peer-reviewed material
Documentation quality matters beyond the grade itself: audits of clinical notes consistently find that interaction and reasoning detail, not just checklist completion, is what separates adequate documentation from strong documentation (Pérez-Toribio et al., 2024) — a standard your case study should also meet.
Frequently Asked Questions
What is included in a comprehensive psychiatric evaluation?
A comprehensive psychiatric evaluation typically includes the HPI, past psychiatric and medical history, MSE, differential diagnosis with DSM-5-TR criteria mapping, diagnostic formulation, a psychopharmacological and treatment plan, and ethical/legal considerations relevant to the case.
How is the NRNP 6635 Week 8 case study graded?
Grading rubrics typically weight diagnostic reasoning (differential diagnosis quality and DSM-5-TR criteria mapping) most heavily, followed by treatment plan justification, MSE accuracy, and APA/scholarly writing standards. Always confirm weighting against your specific course rubric in Canvas, as it can vary by term.
What is the difference between the MSE and the HPI?
The HPI is the patient’s reported history and symptom course over time. The MSE is the clinician’s direct observation of the patient’s mental status at the time of the encounter. Mixing the two — for example, writing ‘patient reports feeling sad’ inside the MSE mood section instead of ‘mood: dysphoric’ — is a common formatting error.
How many differential diagnoses should I include?
Most Walden PMHNP rubrics expect a minimum of three differential diagnoses addressed explicitly, including the ones ultimately ruled out, with reasoning for each.
Which edition of the DSM should I cite?
Use the DSM-5-TR (Text Revision), the current edition, unless your instructor specifies otherwise. Citing the original DSM-5 without the text revision is a common and avoidable citation error.
How recent do my APA references need to be?
Most Walden nursing rubrics require peer-reviewed references within the last 5 years, with the DSM-5-TR as an allowable exception as the standard diagnostic reference.
Related Resources
See the companion sample page for an annotated structural walkthrough of how each section of this assignment is typically organized, including reasoning notes on differential diagnosis logic and psychometric tool selection.
References
American Psychiatric Association. (2022). Diagnostic and statistical manual of mental disorders (5th ed., text rev.).
Bains, N., & Abdijadid, S. (2023). Major depressive disorder. In StatPearls. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK559078/
Demartini, B., Goeta, D., Marchetti, M., Bertino, V., Mazzucchelli, C., Cocchi, S., Olgiati, P., Aguglia, A., & Gambini, O. (2023). Digital phenotyping for differential diagnosis of major depressive episode: Narrative review. JMIR Mental Health, 10, e37225. https://doi.org/10.2196/37225
Fugger, G., Bartova, L., Fabbri, C., Fanelli, G., Dold, M., Swoboda, M. M. M., Kautzky, A., Zohar, J., Souery, D., Mendlewicz, J., Montgomery, S., Rujescu, D., Serretti, A., & Kasper, S. (2022). The sociodemographic and clinical profile of patients with major depressive disorder receiving SSRIs as first-line antidepressant treatment in European countries. European Archives of Psychiatry and Clinical Neuroscience, 272, 1029–1041. https://doi.org/10.1007/s00406-021-01368-3
Kwong, J., Chouinard, M.-C., & Dionne, C. E. (2022). Individualized antidepressant therapy in patients with major depressive disorder: Novel evidence-informed decision support tool. Canadian Family Physician, 68(11), 807–814. https://doi.org/10.46747/cfp.6811807
Lee, T., Patel, R., & Osei, A. (2023). Implementing the Patient Health Questionnaire-9 (PHQ-9) to identify and refer adults with depression. International Journal of Depression and Anxiety, 6(1), 040. https://clinmedjournals.org/articles/ijda/international-journal-of-depression-and-anxiety-ijda-6-040.php
Norris, D., & Clark, M. S. (2024). Mental status examination. In StatPearls. StatPearls Publishing. https://www.statpearls.com/nurse/ce/activity/102804
Pérez-Toribio, A., Moreno-Poyato, A. R., Lluch-Canut, M. T., El-Abidi, K., Rubia-Ruiz, G., Rodríguez-López, A. M., Pérez-Moreno, J. J., Pastor-Bernabeu, M. V., Sánchez-Balcells, S., Ventosa-Ruiz, A., Puig-Llobet, M., & Roldán-Merino, J. F. (2024). The nurse-patient relationship in nursing documentation: The scope and quality of interactions and prevalent interventions in inpatient mental health units. Journal of Nursing Management, 2024, Article 7392388. https://doi.org/10.1155/2024/7392388
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