ICD-10-CM · Chapter 6

G71..19 Other specified myotonic disorders

Billable

← G71 — Primary disorders of muscles Chapter 6: G00-G99

Includes

Myotonia fluctuans
Myotonia permanens
Neuromyotonia [Isaacs]
Paramyotonia congenita (of von Eulenburg)
Pseudomyotonia
Symptomatic myotonia

Last reviewed: September 2026