ICD-10 Code G72.41 – Inclusion Body Myositis [IBM] (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G72.41 – Inclusion body myositis [IBM]
What it is
G72.41 identifies inclusion body myositis, a chronic inflammatory muscle disease that causes slowly progressive weakness. It is a specific myopathy, not a generalized neurologic disorder.
Clinical signs
Typical findings include gradual weakness of the quadriceps and finger flexors, often with muscle wasting and difficulty rising, climbing stairs, or gripping. Clinical features vary; refer to documentation.
When to use this code
Use G72.41 when the provider documents inclusion body myositis, IBM, or biopsy-confirmed inclusion body myositis. Code it for confirmed diagnoses in outpatient or inpatient records when the condition is being evaluated, managed, or listed as an active problem.
Do not assume it from nonspecific weakness alone. If the note only says myopathy, muscle weakness, or inflammatory myositis without IBM, check documentation.
Do not use for
Do not use this code for polymyositis, dermatomyositis, or unspecified myopathy unless IBM is documented. Check documentation when the diagnosis is uncertain or differs from inclusion body myositis.
Coding tip
Assign G72.41 only when the record clearly names IBM or inclusion body myositis; otherwise code the documented muscle disorder.