ICD-10 Code G72.4 – Inflammatory and immune myopathies, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G72.4 – Inflammatory and immune myopathies, not elsewhere classified
What it is
G72.4 identifies inflammatory or immune-mediated muscle disorders that do not fit a more specific myopathy code. Use it when the record describes a myopathy with inflammatory or autoimmune features, but documentation is limited.
Clinical signs
Typical findings include proximal muscle weakness, muscle pain, and difficulty rising, climbing stairs, or lifting the arms. Clinical features vary; refer to documentation for evidence of inflammatory or immune involvement.
When to use this code
Use G72.4 when the provider documents inflammatory myopathy, immune myopathy, or a similar nonspecific diagnosis without naming a more specific subtype. It may also apply when the chart confirms an acquired muscle disorder with immune or inflammatory cause. Check documentation if the diagnosis is uncertain.
Do not use for
Do not use this code for hereditary muscular dystrophies, metabolic myopathies, or neuromuscular conditions without inflammatory or immune features. If the record names a more specific myopathy, code that condition instead.
Coding tip
Code the documented myopathy type first, and use G72.4 only when the record supports an inflammatory or immune cause but lacks a more specific label.