ICD-10 Code G05.4 – Myelitis in diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G05.4 – Myelitis in diseases classified elsewhere
What it is
This code identifies myelitis, or inflammation of the spinal cord, when the cause is recorded elsewhere in the chart and classified under another condition. Use it when the spinal cord inflammation is linked to an underlying disease.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include weakness, sensory changes, gait difficulty, or bowel and bladder dysfunction consistent with spinal cord involvement.
When to use this code
Use G05.4 when the provider documents myelitis as due to another classified disease, and the record supports that relationship. The underlying condition should also be coded when applicable. If the cause is not stated, check documentation before assigning this code.
Do not use for
Do not use this code for idiopathic myelitis or when the spinal cord inflammation is not linked to another disease. Check documentation if the chart instead describes a different neurologic disorder or an unspecified spinal cord condition.
Coding tip
Always code the underlying disease first when the record clearly links it to the myelitis.