8A21

ICD-11 MMS 2026-01

Progressive focal atrophies

Description

Progressive cortical atrophies are neurodegenerative diseases with progressive impairment in a single cognitive domain secondary to circumscribed cerebral atrophy.

Exclusions from above levels

  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
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  • 22 – Injury, poisoning or certain other consequences of external causes

Child codes

  • 8A21.0 – Posterior cortical atrophy
  • 8A21.Y – Other specified progressive focal atrophies
  • 8A21.Z – Progressive focal atrophies, unspecified

Sibling codes

  • 8A20 – Alzheimer disease
  • 8A22 – Lewy body disease
  • 8A23 – Frontotemporal lobar degeneration
  • 8A2Y – Other specified disorders with neurocognitive impairment as a major feature
  • 8A2Z – Disorders with neurocognitive impairment as a major feature, unspecified

Foundation entity

Progressive focal atrophies – http://id.who.int/icd/entity/1345814274

Part of: 08: Diseases of the nervous system