I63.543

HCC Category Mapping

What This Code Means

A stroke caused by blocked or narrowed arteries on both sides of the brain that supply the cerebellum (the part of the brain controlling balance and coordination).

Coding Tips

• •Bilateral cerebellar involvement is relatively uncommon; verify documentation clearly indicates both sides are affected.
• •This presentation typically indicates a more severe stroke with significant neurological impact.

Clinical Significance

This code captures bilateral cerebellar artery stroke, indicating ischemic damage to both sides of the cerebellum. Bilateral cerebellar involvement suggests a more severe clinical picture with significant balance, coordination, and motor planning deficits. Accurate capture is critical for risk adjustment as it reflects high-acuity cerebrovascular disease requiring intensive rehabilitation.

Documentation Requirements

• ✓Clear diagnosis of acute cerebral infarction (stroke) with type specified (ischemic, thrombotic, embolic, or venous)
• ✓Identification of the affected artery or vascular territory when possible (e.g., middle cerebral, cerebellar, small vessel)
• ✓Laterality documentation (right, left, bilateral, or unspecified)
• ✓Neurological deficits present on examination (e.g., weakness, speech difficulty, vision changes)
• ✓Imaging results (CT, MRI, CT angiography) confirming infarction
• ✓Temporal relationship establishing this as an acute event, not a historical or resolved condition
• ✓Causal mechanism when known (thrombosis, embolism, stenosis, venous thrombosis)

Commonly Confused Codes