Retinal ischemia

This code describes a condition where the retina, the light-sensitive tissue at the back of the eye, experiences insufficient blood flow. This lack of oxygen and nutrients can lead to retinal dysfunction and potential vision loss. It encompasses various forms of retinal vascular insufficiency not otherwise specified.

Use this code when documentation indicates a diagnosis of retinal ischemia without further specification of the underlying cause or specific vessel involvement. This is appropriate for conditions like generalized retinal hypoperfusion or when the specific type of retinal vascular occlusion (e.g., arterial or venous) is not documented. Supporting documentation would include ophthalmological exam findings, imaging results (e.g., fluorescein angiography), and physician notes confirming retinal ischemia.

• Do not use this code if a more specific code for retinal artery occlusion (e.g., H34.1-) or retinal vein occlusion (e.g., H34.8-) is documented.
• Consider an additional code to identify any underlying systemic conditions contributing to the ischemia, such as diabetes (E08-E13 with fourth character .3) or hypertension (I10-I15).
• Ensure the documentation clearly states "retinal ischemia" or a similar phrase indicating reduced blood flow to the retina, rather than just general retinal damage.