Transient retinal artery occlusion, unspecified eye

This code signifies a temporary blockage of blood flow in a retinal artery, leading to transient vision loss in an unspecified eye. It indicates a reversible ischemic event affecting the retina, without permanent damage or a specified laterality.

Apply this code when documentation confirms a transient retinal artery occlusion where the affected eye is not specified. This diagnosis is typically supported by patient history of sudden, temporary monocular vision loss (amaurosis fugax) and ophthalmological examination findings consistent with a transient ischemic event in the retina.

• Do not use this code if the laterality (right or left eye) is documented; instead, select the more specific H34.01 or H34.02.
• Distinguish from central retinal artery occlusion (CRAO) or branch retinal artery occlusion (BRAO) which imply a more sustained or permanent blockage.
• Consider sequencing this code as a secondary diagnosis if an underlying systemic condition (e.g., carotid artery disease, atrial fibrillation) is identified as the cause.