Unspecified dementia, severe, with mood disturbance

This code signifies a severe, unspecified form of dementia accompanied by a mood disturbance. The patient exhibits significant cognitive decline impacting daily activities, and also presents with symptoms such as depression, anxiety, or emotional lability that are directly attributable to the dementia.

Apply this code when documentation clearly indicates severe dementia of an unspecified type, along with a co-occurring mood disturbance. This is appropriate when the specific type of dementia (e.g., Alzheimer's, vascular) has not been definitively diagnosed, but the severity and the presence of mood symptoms are established.

• Ensure documentation explicitly states "severe" dementia and details of the mood disturbance.
• Do not use if a more specific type of dementia (e.g., F01.C3, F02.C3) is documented.
• Code the specific mood disorder (e.g., major depressive disorder) separately if it is not considered a direct symptom of the dementia.