ICD-10 Code H47.49 – Disorders of optic chiasm in (due to) other disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H47.49 – Disorders of optic chiasm in (due to) other disorders
What it is
This code identifies optic chiasm disorders caused by another underlying condition. It covers documented chiasmal involvement when the cause is not classified elsewhere.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include visual field defects, reduced visual acuity, or other signs of optic pathway dysfunction.
When to use this code
Use H47.49 when the record states a disorder of the optic chiasm due to another disease, injury, or process, and no more specific code applies. You should support the code with provider documentation linking the chiasmal disorder to the underlying condition. If the cause is unclear, check documentation before coding.
Do not use for
Do not use this code for general visual disturbances without documented optic chiasm involvement. Also avoid it when a more specific diagnosis or etiology is documented elsewhere.
Coding tip
Code the underlying condition first when documented, and use H47.49 only for the chiasmal disorder itself.