8A62

ICD-11 MMS 2026-01

Epileptic encephalopathies

Description

Epilepsies for which no clear etiology can be detected or occurring at the presence of two or more static structural or metabolic conditions increasing the risk for epileptic seizures. The epileptic activity itself may contribute to severe cognitive and behavioural impairments above and beyond what might be expected from the underlying pathology alone.

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

  • 8A62.0 – Infantile spasms
  • 8A62.1 – Lennox-Gastaut syndrome
  • 8A62.2 – Acquired epileptic aphasia
  • 8A62.Y – Other specified epileptic encephalopathies
  • 8A62.Z – Epileptic encephalopathies, unspecified

Sibling codes

  • 8A60 – Epilepsy due to structural or metabolic conditions or diseases
  • 8A61 – Genetic or presumed genetic syndromes primarily expressed as epilepsy
  • 8A63 – Seizure due to acute causes
  • 8A64 – Single seizure due to remote causes
  • 8A65 – Single unprovoked seizure
  • 8A66 – Status epilepticus
  • 8A67 – Acute repetitive seizures
  • 8A68 – Types of seizures
  • 8A6Y – Other specified epilepsy or seizures
  • 8A6Z – Epilepsy or seizures, unspecified

Foundation entity

Epileptic encephalopathies – http://id.who.int/icd/entity/1786562875

Allowed postcoordination axes

Part of: 08: Diseases of the nervous system