ICD-10 Code G46.6 – Pure sensory lacunar syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G46.6 – Pure sensory lacunar syndrome
What it is
G46.6 identifies a lacunar stroke syndrome marked by isolated sensory loss. It reflects a small-vessel brain infarct pattern that affects sensation more than strength or language.
Clinical signs
Typical findings include numbness, tingling, or altered sensation on one side of the body, often involving the face, arm, and leg. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly documents pure sensory lacunar syndrome or an ischemic stroke syndrome with isolated sensory deficits. You should rely on provider diagnosis, neurology notes, or discharge summaries. If the chart only says “stroke” or “numbness,” check documentation.
Do not use for
Do not use it for generalized weakness, mixed lacunar syndromes, or sensory symptoms without a documented lacunar stroke syndrome. Do not apply it when the diagnosis is uncertain.
Coding tip
Code G46.6 only when the provider links the sensory deficit to a lacunar stroke syndrome.