G71.9 — Primary disorder of muscle, unspecified
G71.9 is a billable, specific ICD-10-CM code for primary disorder of muscle, unspecified. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Hereditary myopathy NOS
Risk adjustment
G71.9 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
G71.9 is named in 6 Medicare coverage policies — 6 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A54095Billing and Coding: Nerve Conduction Studies and Electromyography
- A54095Billing and Coding: Nerve Conduction Studies and Electromyography
- A56619Billing and Coding: Nerve Conduction Studies and Electromyography
- A57123Billing and Coding: Nerve Conduction Studies and Electromyography
How G71.9 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 G71.9.
- Myopathy›hereditary
- Myopathy›primary
- Disorder›neuromuscular›hereditary NEC
Related codes at this level
Codes that share G71. If G71.9 is not quite right, the correct code is usually one of these.
Questions about G71.9
- Is G71.9 a billable ICD-10-CM code?
- Yes. G71.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G71.9 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Diseases of myoneural junction and muscle (G70-G73).