ICD-10 Code G25.81 – Restless legs syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G25.81 – Restless legs syndrome
What it is
G25.81 identifies restless legs syndrome, a neurologic condition marked by an urge to move the legs, usually with uncomfortable sensations. Symptoms are typically worse at rest and improve with movement.
Clinical signs
Typical features include leg discomfort, restlessness, and symptoms that begin or worsen in the evening or at night. Clinical features vary; refer to documentation.
When to use this code
Use G25.81 when the provider documents restless legs syndrome or Willis-Ekbom disease as the diagnosis. It fits outpatient, inpatient, or problem-list coding when the condition is confirmed and being evaluated or managed. Check documentation if symptoms are described without a clear diagnosis.
Do not use for
Do not use this code for nonspecific leg pain, cramps, or numbness without documented restless legs syndrome. If the chart suggests another movement disorder or a secondary cause, verify the documented diagnosis first.
Coding tip
Code G25.81 only when the record clearly names restless legs syndrome; otherwise, query for specificity.