Malignant neoplasm of unspecified optic nerve

This code signifies a cancerous tumor originating in the optic nerve, the cranial nerve responsible for transmitting visual information from the retina to the brain. It indicates that the specific side (left or right) of the affected optic nerve is not documented or known.

Apply this code when documentation confirms a primary or metastatic malignant neoplasm of the optic nerve, but the laterality is unspecified. This is appropriate when pathology reports or imaging studies identify the tumor's presence in the optic nerve without specifying if it's the right or left.

• Always seek clarification from the provider if laterality is missing in the documentation, as more specific codes exist.
• Distinguish from benign optic nerve tumors (e.g., optic nerve glioma), which are coded differently.
• Sequence as a primary diagnosis when the neoplasm is the reason for the encounter, or as a secondary diagnosis if it's a co-morbidity.