Disorders of visual pathways in (due to) neoplasm, left side

This code signifies visual pathway dysfunction, such as optic nerve compression or chiasmal lesions, specifically caused by a neoplastic process affecting the left side. It indicates neurological impairment impacting vision due to tumor involvement.

Apply this code when documentation clearly links a patient's visual pathway disorder to a primary or secondary neoplasm. This is appropriate for conditions like left optic nerve compression by a tumor, or left homonymous hemianopsia due to a brain tumor. Supporting documentation should include imaging reports confirming the tumor and ophthalmological or neurological evaluations detailing the visual pathway involvement.

• Always sequence the neoplasm code (C00-D49) as the primary diagnosis when it is the underlying cause.
• Ensure laterality is explicitly documented as "left side" to support this specific code.
• Distinguish from H47.51 (disorders of visual pathways in inflammatory and demyelinating disease) or H47.59 (other disorders of visual pathways) when the etiology is not neoplastic.