Neurocognitive disorders

Definition

Neurocognitive disorders are characterised by primary clinical deficits in cognitive functioning that are acquired rather than developmental. That is, neurocognitive disorders do not include disorders characterised by deficits in cognitive function that are present from birth or that typically arise during the developmental period, which are classified in the grouping neurodevelopmental disorders. Rather, neurocognitive disorders represent a decline from a previously attained level of functioning. Although cognitive deficits are present in many mental disorders (e.g., schizophrenia, bipolar disorders), only disorders whose core features are cognitive are included in the neurocognitive disorders grouping. In cases where the underlying pathology and aetiology for neurocognitive disorders can be determined, the identified etiology should be classified separately.

Exclusions

• Neurodevelopmental disorders

6 subordinate codes

• 6D70Delirium
• 6D71Mild neurocognitive disorder
• 6D72Amnestic disorder
• 6D80-6D8ZDementia
• 4B4YOther specified diseases of the immune system
• 4B4ZDiseases of the immune system, unspecified

Nearby in Mental, behavioural or neurodevelopmental disorders

• 6A00-6A0ZNeurodevelopmental disorders
• 6A20-6A2ZSchizophrenia or other primary psychotic disorders
• 6A40-6A4ZCatatonia
• 6A60-6A8ZMood disorders
• 6B00-6B0ZAnxiety or fear-related disorders
• 6B20-6B2ZObsessive-compulsive or related disorders
• 6B40-6B4ZDisorders specifically associated with stress
• 6B60-6B6ZDissociative disorders