Patient presents with a clinical diagnosis of Parkinson's Disease with Dementia (PDD).  The patient exhibits the characteristic motor symptoms of Parkinson's disease, including bradykinesia, resting tremor, rigidity, and postural instability.  Cognitive decline consistent with dementia is also evident, impacting domains such as executive function, memory, visuospatial skills, and language.  Symptoms include difficulty with planning, problem-solving, recalling recent events, navigating familiar environments, and expressing thoughts fluently.  The patient meets the Movement Disorder Society clinical diagnostic criteria for probable Parkinson's disease and the DSM-5 criteria for major neurocognitive disorder due to Parkinson's disease.  Differential diagnoses considered included Lewy body dementia, Alzheimer's disease, and vascular dementia.  Assessment included a comprehensive neurological examination, cognitive testing such as the Montreal Cognitive Assessment (MoCA), and review of medical history.  The patient's current medication regimen includes carbidopa-levodopa for motor symptom management.  A cholinesterase inhibitor is being considered for cognitive symptoms.  Further evaluation may include neuroimaging such as DaTscan to aid in differentiating Parkinsonian syndromes.  The patient's functional status is declining, impacting activities of daily living (ADLs) such as dressing, bathing, and eating.  Caregiver support and education regarding disease progression, medication management, and safety precautions were provided.  Prognosis and treatment options were discussed with the patient and family.  Follow-up appointments are scheduled to monitor disease progression and adjust treatment as needed.