ICD-10 Code G54.3 – Thoracic root disorders, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G54.3 – Thoracic root disorders, not elsewhere classified
What it is
G54.3 identifies disorders affecting the thoracic nerve roots that are not classified elsewhere. Use it when documentation describes a thoracic radiculopathy or root disorder without a more specific cause.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include band-like thoracic pain, sensory changes along an intercostal distribution, or pain worsened by movement or coughing.
When to use this code
Use G54.3 when the provider documents a thoracic root disorder and does not identify a more specific diagnosis. It also fits when the chart notes thoracic radicular pain, but the underlying cause is not yet established. Check documentation for laterality, cause, or associated spinal disease before coding.
Do not use for
Do not use this code for cervical or lumbar root disorders, or when the condition is better explained by a specific disc, tumor, infection, or traumatic lesion. If the cause is documented elsewhere, code that condition instead.
Coding tip
Look for the exact anatomic level and any stated underlying cause before assigning G54.3.