Retinal artery branch occlusion, right eye

This code signifies a blockage in one of the smaller arteries branching off the main retinal artery in the right eye. This occlusion restricts blood flow to a specific area of the retina, potentially leading to sudden, partial vision loss in the affected eye.

Apply this code when documentation confirms an occlusion of a branch retinal artery affecting the right eye. This diagnosis is typically supported by findings from funduscopic examination, fluorescein angiography, and optical coherence tomography (OCT) demonstrating an ischemic area in the retina corresponding to a specific arterial branch.

• Ensure laterality is accurately documented and coded; differentiate between right, left, and bilateral involvement.
• Distinguish this from central retinal artery occlusion (CRAO), which involves the main retinal artery.
• Look for documentation of the specific branch involved if available, though not required for this code.