Dem in other dis classd elswhr, severe, with psych disturb

This code signifies a severe cognitive decline, specifically dementia, that is a direct consequence of another underlying medical condition (e.g., Parkinson's disease, Huntington's disease, HIV). The patient exhibits significant impairment in daily functioning and experiences psychotic symptoms such as hallucinations or delusions.

Apply this code when documentation clearly links severe dementia and psychotic features to a specific, separately classified underlying disease. This requires a definitive diagnosis of the primary disease and a clinical assessment confirming severe dementia with associated psychosis.

• Always sequence the underlying disease first, followed by this code.
• Ensure documentation explicitly states "severe" dementia and details the presence of psychotic disturbances.
• Differentiate from dementia due to Alzheimer's disease (G30.-) or vascular dementia (F01.-) which have their own specific codes.