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Neurocognitive disorders 599 Neurocognitive disorders Neurocognitive disorders Delirium Neurocognitive disorders are characterized by primary clinical deficits in neurocognitive functioning that are acquired rather than developmental. Neurocognitive functionin...

6D70 Delirium Clinical Descriptions and Diagnostic Requirements for ICD-11 Mental, Behavioural or Neurodevelopmental Disorders • Linguistic and cultural proficiency must also be considered when interpreting test results, in terms of both whether the individual...

6D71 Mild neurocognitive disorder Clinical Descriptions and Diagnostic Requirements for ICD-11 Mental, Behavioural or Neurodevelopmental Disorders Delirium, other specified cause Essential (required) features • All diagnostic requirements for delirium are met....

6D72 Amnestic disorder Clinical Descriptions and Diagnostic Requirements for ICD-11 Mental, Behavioural or Neurodevelopmental Disorders Amnestic disorder Amnestic disorder includes the following subcategories: 6D72.0 Amnestic disorder due to diseases classifie...

Dementia 617 Neurocognitive disorders • This judgement depends on establishing the following. • The specified cause is known to be capable of producing amnestic disorder. • The course of the amnestic disorder (e.g. onset, trajectory of symptoms, response to tr...

6A24 Delusional disorder 185 Schizophrenia and other primary psychotic disorders Delusional disorder Essential (required) features • The presence of a delusion or set of related delusions, typically persisting for at least 3 months and often much longer, in th...

General diagnostic requirements for dementia Clinical Descriptions and Diagnostic Requirements for ICD-11 Mental, Behavioural or Neurodevelopmental Disorders This section begins by providing the general diagnostic requirements for dementia, which are applicabl...

Specific types of dementia

6D80 Dementia due to Alzheimer disease 621 Neurocognitive disorders may be considered. The disorders can co-occur, and some adults with disorders of intellectual development are at greater and earlier risk of developing dementia. For example, individuals with ...

6D81 Dementia due to cerebrovascular disease 623 Neurocognitive disorders Alzheimer disease dementia, mixed type, with cerebrovascular disease Essential (required) features • All diagnostic requirements for dementia due to Alzheimer disease are met. • Neurocog...

6D82 Dementia due to Lewy body disease Clinical Descriptions and Diagnostic Requirements for ICD-11 Mental, Behavioural or Neurodevelopmental Disorders Additional clinical features • Neurocognitive symptoms often follow cerebrovascular compromise. In stroke, t...

6D83 Frontotemporal dementia 625 Neurocognitive disorders Frontotemporal dementia Essential (required) features • All diagnostic requirements for dementia are met. • Dementia is presumed to be attributable to underlying frontotemporal disease or atrophy, as de...

6D84 Dementia due to psychoactive substances, including medications

6D85 Dementia due to diseases classified elsewhere Clinical Descriptions and Diagnostic Requirements for ICD-11 Mental, Behavioural or Neurodevelopmental Disorders Dementia due to psychoactive substances, including medications Essential (required) features • A...

6D8Y Dementia, other specified cause 633 Neurocognitive disorders plaques and tau tangles. APP gene expression is increased due to its location on chromosome 21, which is abnormally triplicated in Down syndrome. Dementia due to Down syndrome may affect 50% or ...

6D8Z Dementia, unknown or unspecified cause

6A2Y Other specified primary psychotic disorder

Specifier for dementia severity Clinical Descriptions and Diagnostic Requirements for ICD-11 Mental, Behavioural or Neurodevelopmental Disorders • The symptoms are not better accounted for by disturbance of consciousness or altered mental status (e.g. due to s...