ICD-10-CM › G00-G99 › G70-G73 › G71.1 Myotonic disorders › G71.12
Myotonia congenita
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Myotonia congenita
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from G71 Primary disorders of muscles
Excludes2 - not included here
- arthrogryposis multiplex congenita (Q74.3)
- metabolic disorders (E70-E88)
- myositis (M60.-)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Thomsen disease
- Myotonia > levior
- Myotonia > congenita
- Disease, diseased > Thomsen
- Disease, diseased > Becker > myotonia congenita
- Becker's > disease > myotonia congenita, recessive form
Codes in the same group
| Code | Description | Status |
|---|---|---|
| G71.11 | Myotonic muscular dystrophy | Valid |
| G71.13 | Myotonic chondrodystrophy | Valid |
| G71.14 | Drug induced myotonia | Valid |
| G71.19 | Other specified myotonic disorders | Valid |