ICD-10 Code G26 – Extrapyramidal and Movement Disorders in Diseases Classified Elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G26 – Extrapyramidal and movement disorders in diseases classified elsewhere
What it is
G26 identifies extrapyramidal or movement disorders that are caused by another underlying disease. Use it when the movement problem is documented as secondary to a separate condition, not as a primary neurologic disorder.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include involuntary movements, abnormal muscle tone, tremor, rigidity, or impaired coordination when these are linked to another disease process.
When to use this code
Use G26 when the record clearly states an extrapyramidal or movement disorder due to another classified condition. It is appropriate when the provider links the movement disorder to an underlying diagnosis and does not assign a primary movement-disorder code.
Check documentation for the causal relationship and the underlying disease. Report the additional condition separately when the chart supports it.
Do not use for
Do not use G26 for primary Parkinson disease, tremor disorders, or chorea without documented secondary cause. If the cause is unclear, check documentation before coding.
Coding tip
Always code the underlying condition first when the record documents a secondary movement disorder.