Foster-Kennedy syndrome, unspecified eye

This code represents Foster-Kennedy syndrome, a rare neurological condition characterized by optic atrophy in one eye and papilledema in the contralateral eye, often accompanied by anosmia. It typically results from a mass lesion, such as a meningioma, in the anterior cranial fossa compressing the optic nerve.

Assign this code when documentation explicitly states a diagnosis of Foster-Kennedy syndrome without specifying laterality. This diagnosis is typically made based on clinical examination findings of unilateral optic atrophy and contralateral papilledema, often confirmed by neuroimaging.

• Always seek clarification from the provider if laterality (right or left eye) is documented, as more specific codes exist.
• Code the underlying cause (e.g., intracranial neoplasm) first, followed by this code for the syndrome.
• Ensure documentation supports both optic atrophy and papilledema, even if "Foster-Kennedy syndrome" is explicitly stated.