G71.19 — Other specified myotonic disorders
G71.19 is a billable, specific ICD-10-CM code for other specified myotonic disorders. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Myotonia fluctuans
- Myotonia permanens
- Neuromyotonia [Isaacs]
- Paramyotonia congenita (of von Eulenburg)
- Pseudomyotonia
- Symptomatic myotonia
Other codes that can never be billed with G71.19
These codes carry an Excludes1 note pointing at G71.19. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G71.19 alone.
- G72.3Periodic paralysis
Risk adjustment
G71.19 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
G71.19 is named in 19 Medicare coverage policies — 19 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52494High Frequency Chest Wall Oscillation Devices - Policy Article
- A52510Mechanical In-exsufflation Devices - Policy Article
- A53052Billing and Coding: Home Health Speech-Language Pathology
- A53057Billing and Coding: Home Health Occupational Therapy
How G71.19 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G71.19.
- Eulenburg's disease(congenital paramyotonia)
- Neuromyotonia(Isaacs)
- Paramyotonia(congenita)
- Pseudomyotonia
- Von Eulenburg's disease
- Cataract›myotonic
- Disease, diseased›Eulenburg's(congenital paramyotonia)
- Disease, diseased›von Eulenburg's(congenital paramyotonia)
- Disorder›myotonic NEC
- Myotonia›fluctuans
- Myotonia›permanens
- Myotonia›symptomatic
Related codes at this level
Codes that share G71.1. If G71.19 is not quite right, the correct code is usually one of these.
Questions about G71.19
- Is G71.19 a billable ICD-10-CM code?
- Yes. G71.19 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G71.19 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Diseases of myoneural junction and muscle (G70-G73).