8C71.4

ICD-11 MMS 2026-01

Neuromyotonia

Description

Neuromyotonia or Isaac's syndrome is an immune-mediated peripheral nerve disorder characterised by continuous muscle fibre activity at rest resulting in muscle stiffness, cramps, myokymia, and pseudomyotonia.

Index terms

  • Neuromyotonia
  • Isaacs neuromyotonia
  • Isaacs syndrome
Show allHide
  • Isaacs-Mertens syndrome
  • continuous muscle fibre activity

Exclusions from above levels

  • http://id.who.int/icd/entity/155258022 – Metabolic disorders
  • LD26.41 – Arthrogryposis multiplex congenita
  • 05 – Endocrine, nutritional or metabolic diseases
Show allHide
  • 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

  • 8C71.0 – Myotonic dystrophy
  • 8C71.1 – Chondrodystrophic myotonia
  • 8C71.2 – Myotonia congenita
  • 8C71.3 – Drug-induced myotonia
  • 8C71.5 – Pseudomyotonia
  • 8C71.Y – Other specified myotonic disorders
  • 8C71.Z – Myotonic disorders, unspecified

Foundation entity

Neuromyotonia – http://id.who.int/icd/entity/646523932

Part of: 8C71: Myotonic disorders › 08: Diseases of the nervous system