Pure sensory lacunar syndrome

This code represents a specific type of lacunar stroke characterized exclusively by sensory deficits without any motor weakness, ataxia, or dysarthria. It typically results from a small infarct in the thalamus or brainstem, affecting sensory pathways. Patients experience numbness, tingling, or pain on one side of the body.

Use this code when documentation clearly indicates a lacunar stroke presenting solely with sensory symptoms, such as hemianesthesia or paresthesia, without any accompanying motor or other neurological deficits. Supporting documentation should specify the pure sensory nature of the syndrome and often includes imaging (e.g., MRI) confirming a lacunar infarct in an appropriate location.

• Ensure the documentation explicitly states "pure sensory" to differentiate from other lacunar syndromes.
• Do not use this code if any motor weakness or other non-sensory deficits are present; consider other lacunar syndrome codes (e.g., G46.3, G46.4).
• Sequence this code after the acute cerebrovascular disease code (e.g., I63.81) if it represents the sequela or specific manifestation of a recent stroke.