Code Attributes

• Billable/Specific Code

Applicable To

• Mental disorder NOS due to known physiological condition
• Organic brain syndrome NOS
• Organic mental disorder NOS
• Organic psychosis NOS
• Symptomatic psychosis NOS

Approximate Synonyms

• Chronic organic brain syndrome
• Chronic organic mental disorder
• Cognitive disorder
• Mental disorder due to medical condition
• Mild cognitive impairment, so stated
• Non-psychotic mental disorder
• Organic brain syndrome
• Organic mental disorder
• Specific nonpsychotic mental disorders following organic brain damage
• Transient organic mental disorder

Clinical Information

• Broad group of severe mental and behavioral disorders etiologically traceable to brain disease, injury, or toxicosis; psychosis associated with endocrine disorders, drugs, and metabolic or nutritional abnormalities.
• Cognitive disorders including delirium, dementia, and other cognitive disorders. These may be the result of substance use, trauma, or other causes.
• What: organic brain syndrome. Organic brain syndrome: either a long term deterioration of intellectual function and memory (dementia) or a short term disturbance of orientation, judgement, or consciousness (delirium). Both may be marked by illusions, hallucinations, delusions, or disturbances of perceptions, mood, behavior, cognitive capacity, or personality. Why: delirium can occur with rheumatic fever or cerebral vasculitis. Both delirium and dementia can occur in systemic lupus erythematosus, and rarely also in mixed connective tissue disease.

Type 1 Excludes:

• Mild neurocognitive disorder due to known physiological condition (F06.7-)
• Psychosis NOS (F29)

Code First

• The underlying physiological condition