MB21.0

ICD-11 MMS 2026-01

Age-associated cognitive decline

Description

A normative (non-pathological) deterioration of higher cortical functions such as thinking, reasoning, comprehension, calculation, learning, language, and judgment.

Index terms

  • Age-associated cognitive decline
  • Age related cognitive decline
  • Age-associated memory impairment
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  • Ageing-related cognitive decline
  • Senile degeneration of brain, not elsewhere classified
  • senile brain degeneration
  • senile degeneration of brain

Exclusions from above levels

  • 19 – Certain conditions originating in the perinatal period
  • JA66 – Clinical findings on antenatal screening of mother

Sibling codes

  • MB21.1 – Amnesia
  • MB21.2 – Anosognosia
  • MB21.3 – Confabulation
  • MB21.4 – Disorientation
  • MB21.5 – Distractibility
  • MB21.6 – Impaired abstract thinking
  • MB21.7 – Impaired executive functioning
  • MB21.8 – Impaired judgment
  • MB21.9 – Perseveration
  • MB21.A – Poor concentration
  • MB21.B – Racing thoughts
  • MB21.Y – Other specified symptoms, signs or clinical findings involving cognition
  • MB21.Z – Symptoms, signs or clinical findings involving cognition, unspecified

Foundation entity

Age-associated cognitive decline – http://id.who.int/icd/entity/584231559

Part of: MB21: Symptoms, signs or clinical findings involving cognition › 21: Symptoms, signs or clinical findings, not elsewhere classified