Western Governors University

D346: Advanced Psychiatric Mental Health Care of Adults and Older Adults Across Care Settings

A study guide to WGU's PMHNP course on diagnosing and treating mental health conditions in adults, older adults, couples and families.

Updated October 2026 · 5 min read

Advanced Psychiatric Mental Health Care of Adults and Older Adults Across Care Settings applies PMHNP assessment and diagnostic skills to adults, older adults and families with complex mental health needs.

It is a term 4 course in WGU's MSN - Psychiatric Mental Health Nurse Practitioner program, worth 3 competency units, taken alongside Psychopharmacology and the child and adolescent course.

Students find it demanding because adult cases rarely come in one piece. Medical illness, substance use, family conflict and age-related change all affect diagnosis and treatment.

Course at a Glance

ItemDetails
UniversityWestern Governors University (WGU)
CourseD346 Advanced Psychiatric Mental Health Care of Adults and Older Adults Across Care Settings
LevelGraduate (MSN), 3 competency units
PopulationAdults, older adults, couples and families
PrerequisitesMSN core plus advanced pathophysiology, pharmacology and health assessment
Typical workCase studies, DSM-5-TR diagnosis, treatment plans

What D346 Covers

WGU describes developmentally appropriate assessment and diagnostic reasoning, treatment planning with psychotherapy, psychopharmacology and community resources, and the influence of family dynamics and societal norms on progression and recovery. The four competencies are:

Competency (summarized)In practice
Diagnose acute and chronic conditions in adults and older adults using the DSM-5-TRCriteria, differentials and ruling out medical causes
Synthesize patient-centered psychotherapeutic and pharmacological treatment plansCombined plans matched to diagnosis and preferences
Incorporate best practices and health teaching for adults, couples and familiesFamily involvement, psychoeducation, relapse prevention
Incorporate best practices for older adults across developmental stages and settingsCognitive screening, polypharmacy, care transitions

Key Concepts Explained

Differential Diagnosis in Adults

Before settling on a psychiatric diagnosis, rule out medical conditions, medication effects and substance use. Thyroid disease, sleep apnoea and medication side effects can all mimic depression or anxiety.

Delirium, Dementia and Depression in Older Adults

These three are often confused. Delirium has an acute onset and fluctuating attention and is a medical emergency. Dementia develops gradually with progressive cognitive decline. Depression in older adults can present with cognitive complaints and poor effort on testing.

Example (fictional): An 81-year-old man in a care home becomes confused and agitated over two days and is worse at night. Staff ask for an antipsychotic. Because onset is sudden and attention fluctuates, delirium is the leading concern: the priority is a medical work-up (infection, medication changes, dehydration), not sedation.

Family Dynamics and Recovery

Family conflict, caregiving strain and cultural expectations shape how symptoms develop and how recovery progresses. Plans that involve family, with the patient's consent, tend to be more realistic.

Typical Assignments and How to Approach Them

Assignment typeWhat it testsHow to approach it
Adult case studyDiagnosis and planningPresent findings, criteria met, differentials, then the plan
Older adult caseGeriatric considerationsAddress cognition, comorbidity, polypharmacy and setting
Family or couples focusSystemic thinkingDescribe family roles and how they affect the plan
Treatment planEvidence-based combined carePair psychotherapy and medication with community resources

Care Across Settings

The course title stresses care across settings: outpatient clinics, inpatient units, emergency departments, primary care, long-term care and community services. The setting changes what is possible and what is safe.

In written work, state the setting and adjust the plan to it. An outpatient plan relies on follow-up appointments and safety planning at home; a long-term care plan involves staff education, non-drug approaches to behavior and close medication review.

A Reliable Case Study Structure

Case studies are the most common written task in population-focused courses. Following the same order every time keeps your reasoning visible and makes rubric points easy to find.

SectionWhat to include
PresentationChief concern, history of present illness, setting
HistoryPsychiatric, medical, medication, substance, family and social history
Assessment findingsMSE, risk assessment, screening tools, relevant labs
DiagnosisDSM-5-TR criteria met, ranked differentials, medical causes ruled out
PlanPsychotherapy, medication, community resources, family involvement
Follow-upMonitoring, measurable goals, review date, referral triggers

For older adults, add explicit notes on cognition, falls risk and every current medication, since polypharmacy is often part of the presentation.

Where Students Get Stuck

Study Tips for D346

How We Help with D346

Send the case prompt, rubric and feedback. A writer with psychiatric nursing knowledge prepares a model case analysis on a fictional adult or older adult patient, explains diagnostic reasoning, or reviews your draft. Our nursing case study format guide explains a reliable structure.

GradeEssays is independent of Western Governors University. All work is a study aid; you write and submit your own work under WGU's academic integrity rules, and we never invent clinical data. Every order is written from scratch, plagiarism-checked and covered by free revisions within the scope of your original request.

Strengthen Your D346 Case Work

Share the task, case and feedback. We prepare a model case analysis on a fictional adult or older adult patient.

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Frequently Asked Questions

Which populations does D346 cover?

Adults, older adults, couples and families, across care settings.

When is D346 taken?

WGU's standard path places it in term 4 with Psychopharmacology and the child and adolescent course.

Does D346 use the DSM-5-TR?

Yes. One competency asks you to diagnose acute and chronic conditions using the DSM-5-TR.

What makes older adult cases different?

Medical comorbidity, polypharmacy, cognitive change and setting all affect diagnosis and treatment.

Should plans include medication and therapy?

Usually yes. The competencies ask for psychotherapeutic and/or pharmacological plans plus community resources.

Can you write my case study to submit?

No. We provide custom analyses and feedback so you can write your own.