G71.19
Other specified myotonic disorders
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 11 never code together
G71code
G00-G99chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 6
G71.19code
Inclusion terms
- Myotonia fluctuans
- Myotonia permanens
- Neuromyotonia [Isaacs]
- Paramyotonia congenita (of von Eulenburg)
- Pseudomyotonia
- Symptomatic myotonia
Index entries leading here 9
- Cataract (cortical) (immature) (incipient) H26.9
- Disease, diseased — see also Syndrome
- Disorder (of) — see also Disease
- myotonic NEC G71.19
- Eulenburg's disease (congenital paramyotonia) G71.19
- Myotonia (acquisita) (intermittens) M62.89
- Neuromyotonia (Isaacs) G71.19
- Paramyotonia (congenita) G71.19
- Pseudomyotonia G71.19
- Von Eulenburg's disease G71.19
Alongside this code 4 same parent — G71.1
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.