Unspecified dementia, severe

disorders of psychological development

symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

This block comprises a range of mental disorders grouped together on the basis of their having in common a demonstrable etiology in cerebral disease, brain injury, or other insult leading to cerebral dysfunction. The dysfunction may be primary, as in diseases, injuries, and insults that affect the brain directly and selectively; or secondary, as in systemic diseases and disorders that attack the brain only as one of the multiple organs or systems of the body that are involved.

• Major neurocognitive disorder NOS
• Presenile dementia NOS
• Presenile psychosis NOS
• Primary degenerative dementia NOS
• Senile dementia NOS
• Senile dementia depressed or paranoid type
• Senile psychosis NOS

• dementia with delirium or acute confusional state (F05)
• mild memory disturbance due to known physiological condition (F06.8)