Disorders of optic chiasm in (due to) inflammatory disorders

This code signifies visual pathway disturbances specifically affecting the optic chiasm, which are directly attributable to an underlying inflammatory process. This can manifest as various visual field defects, such as bitemporal hemianopsia, resulting from inflammation impacting the crossing fibers of the optic nerves.

Apply this code when documentation clearly links optic chiasm dysfunction to an inflammatory condition, such as multiple sclerosis, sarcoidosis, or lupus. Supporting documentation should include imaging findings (e.g., MRI showing chiasmal inflammation) and ophthalmological examination results confirming chiasmal involvement.

• Always sequence the underlying inflammatory disorder code first, followed by this code.
• Distinguish from other optic chiasm disorders not inflammatory in origin (e.g., neoplastic, vascular).
• Ensure the physician's documentation explicitly states the inflammatory etiology for the chiasmal disorder.