8B11.3

ICD-11 MMS 2026-01

Cerebral ischaemic stroke due to small artery occlusion

Description

This is a sudden loss of brain function due to a lack of adequate blood flow of the small arteries.

Coding note

If an additional code is used for anatomy, the artery affected by the stroke should be selected.

Coding note from above levels

When the cause of ischaemic stroke is known, code to the cause. When the cause of ischaemic stroke is not known, code to 8B11.5-. When the cause of stroke is not known, code to 8B20 Stroke not known if ischaemic or haemorrhagic.

Index terms

  • Cerebral ischaemic stroke due to small artery occlusion
  • Lacunar infarction
  • cerebral infarction due to unspecified occlusion of small cerebral artery
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  • lacunar stroke

Exclusions from above levels

  • 8B21.0 – Silent cerebral infarct
  • 8B25.0 – sequelae of cerebral infarction
  • NA07 – Intracranial injury
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  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • 8B11.0 – Cerebral ischaemic stroke due to extracranial large artery atherosclerosis
  • 8B11.1 – Cerebral ischaemic stroke due to intracranial large artery atherosclerosis
  • 8B11.2 – Cerebral ischaemic stroke due to embolic occlusion
  • 8B11.4 – Cerebral ischaemic stroke due to other known cause
  • 8B11.5 – Cerebral ischaemic stroke of unknown cause

Foundation entity

Cerebral ischaemic stroke due to small artery occlusion – http://id.who.int/icd/entity/1595033000

Allowed postcoordination axes

Part of: 8B11: Cerebral ischaemic stroke › 08: Diseases of the nervous system