8A61.4

ICD-11 MMS 2026-01

Genetic epileptic syndromes with variable age of onset

Description

Epilepsies occurring in an otherwise normal child or adult. Seizures may occur spontaneously or may be provoked by external stimuli. Family history of seizures is not uncommon and is frequently reported in selected epilepsy syndromes. Genetic aspects may follow differing features ranging from complex hereditary patterns to classic Mendelian features or to focused defects.

Coding note from above levels

Use additional code, if desired, to identify the type of seizure.

Exclusions from above levels

  • MG45 – Syncope
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
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  • 19 – Certain conditions originating in the perinatal period
  • 22 – Injury, poisoning or certain other consequences of external causes

Child codes

  • 8A61.40 – Reflex epilepsies
  • 8A61.41 – Progressive myoclonic epilepsy
  • 8A61.4Y – Other specified genetic epileptic syndromes with variable age of onset
  • 8A61.4Z – Genetic epileptic syndromes with variable age of onset, unspecified

Sibling codes

  • 8A61.0 – Genetic epileptic syndromes with neonatal onset
  • 8A61.1 – Genetic epileptic syndromes with onset in infancy
  • 8A61.2 – Genetic epileptic syndromes with childhood onset
  • 8A61.3 – Genetic epileptic syndrome with adolescent or adult onset
  • 8A61.Y – Other specified genetic or presumed genetic syndromes primarily expressed as epilepsy
  • 8A61.Z – Genetic or presumed genetic syndromes primarily expressed as epilepsy, unspecified

Foundation entity

Genetic epileptic syndromes with variable age of onset – http://id.who.int/icd/entity/91180764

Allowed postcoordination axes

Part of: 8A61: Genetic or presumed genetic syndromes primarily expressed as epilepsy › 08: Diseases of the nervous system