Partial retinal artery occlusion, left eye

This code signifies a blockage affecting a portion of the arterial blood supply to the retina in the left eye. This partial obstruction can lead to localized areas of retinal ischemia and visual field defects.

Assign this code when documentation clearly indicates a partial occlusion of a retinal artery affecting the left eye. This diagnosis is typically made based on ophthalmoscopic examination, fundus photography, and potentially fluorescein angiography.

• Differentiate from central retinal artery occlusion (CRAO) or branch retinal artery occlusion (BRAO) which have distinct codes.
• Ensure laterality is precisely documented (left eye).
• Look for associated visual disturbances or scotomas in the patient's record.