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M63.8

M63.8: Disorders of muscle in diseases classified elsewhere

Non-billable headerICD-10-CM

M63.8 is a non-billable header ICD-10-CM code for disorders of muscle in diseases classified elsewhere. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above M63.8

A category’s note binds every code beneath it.

Written on M63: Disorders of muscle in diseases classified elsewhere

  • myopathy in cysticercosis (B69.81)
  • myopathy in endocrine diseases (G73.7)
  • myopathy in metabolic diseases (G73.7)
  • myopathy in sarcoidosis (D86.87)
  • myopathy in secondary syphilis (A51.49)
  • myopathy in syphilis (late) (A52.78)
  • myopathy in toxoplasmosis (B58.82)
  • myopathy in tuberculosis (A18.09)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead M63.8

10 child codes. Green means billable.

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.