8A68.6

ICD-11 MMS 2026-01

Generalised tonic seizure

Description

A seizure characterised by sustained increase in muscle contraction lasting a few seconds to minutes.

Coding note from above levels

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

Index terms

  • Generalised tonic seizure

Exclusions from above levels

  • 6B60.4 – Dissociative neurological symptom disorder, with non-epileptic seizures
  • KB06 – Neonatal seizures
  • MG45 – Syncope
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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

  • 8A68.0 – Focal unaware seizure
  • 8A68.1 – Absence seizures, atypical
  • 8A68.2 – Absence seizures, typical
  • 8A68.3 – Focal aware seizure
  • 8A68.4 – Generalised tonic-clonic seizure
  • 8A68.5 – Generalised myoclonic seizure
  • 8A68.7 – Generalised atonic seizure
  • 8A68.Y – Other specified type of seizure
  • 8A68.Z – Type of seizure, unspecified

Foundation entity

Generalised tonic seizure – http://id.who.int/icd/entity/515072580

Part of: 8A68: Types of seizures › 08: Diseases of the nervous system