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

This code signifies severe dementia that is a manifestation of another underlying medical condition, not primarily a neurodegenerative disorder like Alzheimer's. The patient exhibits significant cognitive decline impacting daily function, accompanied by prominent mood disturbances such as depression, anxiety, or irritability.

Apply this code when documentation clearly states severe dementia secondary to a specific medical condition (e.g., Parkinson's disease, Huntington's disease, HIV disease) and explicitly notes associated mood disturbance. Ensure the physician's assessment confirms the severity of the dementia.

• Always code the underlying disease first, followed by this dementia code.
• Confirm the "severe" specifier is documented; otherwise, consider codes for mild or moderate dementia.
• Do not use this code for dementia due to Alzheimer's disease or vascular dementia.