ICD-11 classes
08 Diseases of the nervous system
Diseases of neuromuscular junction or muscle
Primary disorders of muscles
8C71 — Myotonic disorders
ICD-11 8C71 — Myotonic disorders
Group of inherited muscular disorders associated with clinical and/or electrical myotonia. Myotonia is defined clinically as the occurrence of “delayed relaxation of muscle after voluntary contraction or percussion.”
The diagnosis includes nothing.
The diagnosis excludes nothing.
Diagnosis with code 8C71 contains 8 clarifying diagnoses:
- 8C71.0 — Myotonic dystrophy
- 8C71.1 — Chondrodystrophic myotonia
- 8C71.2 — Myotonia congenita
- 8C71.3 — Drug-induced myotonia
- 8C71.4 — Neuromyotonia
- 8C71.5 — Pseudomyotonia
- 8C71.Y — Other specified myotonic disorders
- 8C71.Z — Myotonic disorders, unspecified
The diagnosis is coded elsewhere:
- Primary disorders of muscles #10017
- Myotonic disorders #10033