Disord of visual cortex in neoplasm, left side of brain

This code signifies visual disturbances or deficits originating from damage to the left visual cortex, specifically when the underlying cause is a neoplastic process (tumor) affecting that region of the brain. Patients may experience hemianopsia, quadrantanopsia, or other visual field defects.

Use this code when documentation clearly links a patient's visual cortex disorder to a brain neoplasm located on the left side. This is appropriate for conditions like homonymous hemianopsia caused by a primary or metastatic tumor impacting the left occipital lobe. Supporting documentation should include imaging reports (MRI, CT) confirming the tumor's location and neurological/ophthalmological evaluations detailing the visual deficits.

• Always sequence the neoplasm code (e.g., C71.4 for malignant neoplasm of occipital lobe) before this code, as it represents the underlying etiology.
• Ensure the laterality (left side) of both the visual cortex disorder and the neoplasm is explicitly documented.
• Distinguish from visual field defects due to optic nerve or chiasm involvement, which would use different codes.