8A40

ICD-11 MMS 2026-01

Multiple sclerosis

Description

Multiple Sclerosis (MS) is a chronic, inflammatory demyelinating disease of the central nervous system. Three categories of multiple sclerosis have been outlined: Relapsing/remitting, secondary progressive and primary progressive multiple sclerosis.

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

  • 8A40.0 – Relapsing-remitting multiple sclerosis
  • 8A40.1 – Primary progressive multiple sclerosis
  • 8A40.2 – Secondary progressive multiple sclerosis
  • 8A40.Y – Other specified multiple sclerosis
  • 8A40.Z – Multiple sclerosis, unspecified

Sibling codes

  • 8A41 – Isolated demyelinating syndromes of the central nervous system
  • 8A42 – Acute disseminated encephalomyelitis
  • 8A43 – Neuromyelitis optica
  • 8A44 – Leukodystrophies
  • 8A45 – Secondary white matter disorders
  • 8A46 – Central demyelination of corpus callosum
  • 8A4Y – Other specified multiple sclerosis or other white matter disorders
  • 8A4Z – Multiple sclerosis or other white matter disorders, unspecified

Foundation entity

Multiple sclerosis – http://id.who.int/icd/entity/1298865187

Allowed postcoordination axes

Part of: 08: Diseases of the nervous system