Central retinal vein occlusion, left eye, w rtnl neovas

This code signifies a blockage of the main vein draining blood from the retina in the left eye, which has led to the development of abnormal new blood vessels on the retina. These new vessels are fragile and can cause further vision loss through hemorrhage or retinal detachment.

Apply this code when documentation confirms a central retinal vein occlusion affecting the left eye, specifically noting the presence of retinal neovascularization. This often occurs in patients with underlying systemic conditions like hypertension or diabetes.

• Ensure documentation clearly specifies "central" retinal vein occlusion and not a branch occlusion.
• Verify the affected eye (left) and the presence of "retinal" neovascularization, distinguishing it from iris neovascularization.
• Sequence this code before any codes for complications directly resulting from the neovascularization, such as vitreous hemorrhage (H35.6-) or tractional retinal detachment (H33.4-).