ICD-10 Code H47.43 – Disorders of optic chiasm in (due to) vascular disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H47.43 – Disorders of optic chiasm in (due to) vascular disorders
What it is
This code identifies a disorder of the optic chiasm caused by a vascular condition, such as impaired blood flow or a vascular lesion. It describes chiasmal involvement rather than a general eye disease.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings may include visual field loss, reduced visual acuity, or other neurologic visual symptoms consistent with optic chiasm involvement.
When to use this code
Use H47.43 when the provider documents optic chiasm dysfunction specifically linked to a vascular disorder. This may apply when imaging, exam findings, or specialist assessment support a vascular cause. If the record only says “optic chiasm disorder” without cause, check documentation.
Do not use for
Do not use this code for optic chiasm disorders from tumors, trauma, or inflammatory disease. If the etiology is not vascular, or the cause is unclear, choose the documented condition or verify the record.
Coding tip
Always code the underlying vascular condition when it is documented and supported in the chart.