ICD-10-CM diagnosis code
G71.21 Nemaline myopathy
- Billable
- Yes, a complete code (FY2026)
- Category
- G71 Primary disorders of muscles
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Other codes in G71
28 complete codes in this category.
- G71.11Myotonic muscular dystrophy
- G71.12Myotonia congenita
- G71.13Myotonic chondrodystrophy
- G71.14Drug induced myotonia
- G71.19Other specified myotonic disorders
- G71.20Congenital myopathy, unspecified
- G71.21Nemaline myopathy
- G71.220X-linked myotubular myopathy
- G71.228Other centronuclear myopathy
- G71.29Other congenital myopathy
- G71.3Mitochondrial myopathy, not elsewhere classified
- G71.8Other primary disorders of muscles
Documentation tips
- Make sure the note supports every element of the title, “Nemaline myopathy”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to G71.
The international WHO ICD-10 also has G71, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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