Transient retinal artery occlusion, left eye

This code describes a temporary blockage of an artery supplying the retina in the left eye, leading to a sudden, but often reversible, loss of vision. It indicates an acute ischemic event affecting the retinal circulation without permanent damage.

Apply this code when documentation specifies a transient retinal artery occlusion affecting the left eye. This diagnosis is typically supported by a sudden onset of monocular vision loss that resolves spontaneously or with intervention, and ophthalmoscopic findings consistent with retinal ischemia.

• Ensure laterality is clearly documented as "left eye." If unspecified, query the provider.
• Distinguish from permanent retinal artery occlusions (e.g., central or branch retinal artery occlusion) which have different ICD-10-CM codes.
• Consider sequencing this code as a primary diagnosis if it is the reason for the encounter, or as a secondary diagnosis if it is a co-morbidity.