Ischemic optic neuropathy, bilateral

This code signifies a diagnosis of ischemic optic neuropathy affecting both eyes. This condition results from insufficient blood supply to the optic nerve, leading to sudden, painless vision loss. It can be categorized as arteritic (e.g., due to giant cell arteritis) or non-arteritic.

Use this code when documentation explicitly states bilateral ischemic optic neuropathy. This diagnosis is typically supported by ophthalmological examination findings, including optic disc edema or pallor, and visual field defects. It's crucial to specify laterality if only one eye is affected.

• Differentiate between arteritic and non-arteritic forms if specified in the documentation, as this may require an additional code for the underlying cause (e.g., GCA).
• Ensure the documentation clearly indicates bilateral involvement; otherwise, use the appropriate unilateral code (H47.011 for right, H47.012 for left).
• Code any associated systemic conditions, such as diabetes or hypertension, that may contribute to non-arteritic ischemic optic neuropathy.