6D80.1

ICD-11 MMS 2026-01

Dementia due to Alzheimer disease with late onset

Description

Dementia due to Alzheimer disease that develops at the age of 65 years or above. This is the most common pattern, representing more than 95% of all cases.

Coding note

This category should never be used in primary tabulation. The codes are provided for use as supplementary or additional codes when it is desired to identify the presence of dementia in diseases classified elsewhere. When dementia is due to multiple aetiologies, code all that apply.

Coding note from above levels

This category should never be used in primary tabulation. The codes are provided for use as supplementary or additional codes when it is desired to identify the presence of dementia in diseases classified elsewhere.

This category should only be used for primary tabulation, if the aetiology of the dementia is unknown. If the aetiology of the dementia is known code to the aetiology of the dementia for primary tabulation. When dementia is due to multiple aetiologies, code all that apply.

Index terms

  • Dementia due to Alzheimer disease with late onset
  • Alzheimer disease dementia with late onset
  • SDAT - [senile dementia, Alzheimer type]
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  • dementia in Alzheimer disease type 1
  • dementia in Alzheimer disease with late onset
  • late onset Alzheimer brain sclerosis
  • late onset Alzheimer dementia
  • primary degenerative Alzheimer type dementia, late onset
  • senile Alzheimer brain disease
  • senile Alzheimer brain sclerosis
  • senile dementia of the Alzheimer type
  • senile primary degenerative Alzheimer type dementia

Exclusions from above levels

  • 6A00 – Disorders of intellectual development
  • 6D70 – Delirium
  • http://id.who.int/icd/entity/1516623224 – Neurodevelopmental disorders
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  • MB20.0 – Stupor
  • MB20.1 – Coma
  • MG2A – Ageing associated decline in intrinsic capacity
  • QE62 – Uncomplicated bereavement
  • QE84 – Acute stress reaction

Sibling codes

  • 6D80.0 – Dementia due to Alzheimer disease with early onset
  • 6D80.2 – Alzheimer disease dementia, mixed type, with cerebrovascular disease
  • 6D80.3 – Alzheimer disease dementia, mixed type, with other nonvascular aetiologies
  • 6D80.Z – Dementia due to Alzheimer disease, onset unknown or unspecified

Foundation entity

Dementia due to Alzheimer disease with late onset – http://id.who.int/icd/entity/1855418451

Allowed postcoordination axes

Part of: 6D80: Dementia due to Alzheimer disease › 06: Mental, behavioural or neurodevelopmental disorders