Trib rtnl vein occlusion, left eye, with macular edema

This code signifies a blockage in a smaller branch of the retinal vein in the left eye, leading to impaired blood flow and subsequent swelling of the macula. This condition can cause blurred vision or vision loss in the affected eye due to fluid accumulation in the central part of the retina.

Apply this code when documentation confirms a diagnosis of tributary retinal vein occlusion specifically affecting the left eye, and explicitly states the presence of macular edema. This diagnosis is typically made via ophthalmoscopy, fluorescein angiography, and optical coherence tomography (OCT) imaging.

• Ensure documentation specifies "tributary" or "branch" vein occlusion, not central retinal vein occlusion.
• Verify the laterality is clearly documented as "left eye."
• Confirm the presence of "macular edema" as a distinct finding; if edema is absent, a different code is required.