ICD-10 Code G72.49 – Other inflammatory and immune myopathies, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G72.49 – Other inflammatory and immune myopathies, not elsewhere classified
What it is
G72.49 identifies inflammatory or immune-mediated muscle disease that does not fit a more specific myopathy category. Use it when documentation supports an acquired inflammatory muscle disorder and no narrower code is available.
Clinical signs
Typical findings include proximal muscle weakness, muscle pain, and fatigue; some patients also have elevated muscle enzymes or abnormal muscle biopsy results. Clinical features vary; refer to documentation.
When to use this code
Use this code when the clinician documents an inflammatory or immune myopathy and names no more specific subtype. It also fits cases described as “other” or “unspecified inflammatory myopathy” when the record supports an immune-mediated muscle process. Check documentation if the diagnosis is uncertain.
Do not use for
Do not use it for hereditary muscular dystrophies, noninflammatory myopathies, or weakness without a confirmed myopathy diagnosis. If a more specific inflammatory myopathy is documented, code that instead.
Coding tip
Confirm the provider’s exact myopathy wording before assigning G72.49, and code the most specific documented inflammatory subtype whenever possible.