Central retinal artery occlusion, right eye

This code signifies a sudden and severe blockage of the main artery supplying blood to the retina in the right eye. This interruption of blood flow leads to acute, painless vision loss in the affected eye due to retinal ischemia. It is a medical emergency requiring prompt evaluation.

Apply this code when documentation clearly indicates a diagnosis of central retinal artery occlusion affecting the right eye. Supporting clinical findings often include sudden monocular vision loss, a cherry-red spot on the macula, and retinal whitening on ophthalmoscopic examination.

• Ensure laterality is accurately documented and coded; distinguish between right, left, and bilateral involvement.
• Do not confuse with branch retinal artery occlusion (H34.2-) or transient retinal artery occlusion (H34.0-).
• Look for associated systemic conditions, such as atherosclerosis or emboli, which may require additional coding.