Central retinal vein occlusion, unsp, w rtnl neovas

This code signifies a blockage in the central retinal vein, leading to impaired blood flow from the retina, which has subsequently caused the growth of abnormal new blood vessels on the retina. The specific eye affected is not documented. This condition can severely impact vision due to hemorrhage, fluid leakage, or tractional retinal detachment.

Use this code when the medical record clearly documents a diagnosis of central retinal vein occlusion (CRVO) with the presence of retinal neovascularization, but the physician has not specified which eye is affected. Documentation should explicitly state "central retinal vein occlusion with neovascularization" without laterality.

• Do not use this code if the medical record specifies the affected eye (right, left, or bilateral). Instead, select the appropriate laterality code.
• Ensure documentation explicitly states "neovascularization" to support the fifth character '1'. If neovascularization is absent, a different code from the H34.81 category should be chosen.
• Consider sequencing this code as a primary diagnosis if it is the main reason for the encounter, especially for treatment of the neovascularization or its complications.