Disord of visual pathways in (due to) neoplasm, right side

This code signifies visual pathway dysfunction, such as optic nerve compression or chiasmal lesions, that is directly caused by a neoplastic process affecting the right side of the visual system. This includes conditions like hemianopsia or quadrantanopsia resulting from tumor impingement on the optic nerve, chiasm, or tract.

Apply this code when documentation clearly links a visual field defect or other visual pathway disorder to a primary or secondary neoplasm affecting the right eye, optic nerve, chiasm, or right optic tract. This diagnosis requires explicit physician documentation of the causal relationship between the tumor and the visual impairment.

• Ensure the documentation specifies the right side of the visual pathway is affected.
• Always code the underlying neoplasm first, followed by this code to indicate the manifestation.
• Look for terms like "due to neoplasm," "secondary to tumor," or "caused by malignancy" in the physician's notes.