Malignant neoplasm of right optic nerve

This diagnosis code signifies a primary cancerous tumor originating in the right optic nerve. This is a rare but serious condition that can lead to vision loss and may extend to other parts of the central nervous system. It represents the malignant transformation of cells within the nerve responsible for transmitting visual information from the right eye to the brain.

Apply this code when documentation clearly indicates a primary malignant neoplasm affecting the right optic nerve. This diagnosis is typically established through imaging studies (e.g., MRI, CT) and often confirmed by biopsy or surgical pathology reports. Use this code for initial diagnosis, treatment planning, and follow-up care related to the primary tumor.

• Ensure laterality is explicitly documented as "right" optic nerve; avoid using for unspecified or left-sided tumors.
• Distinguish from secondary metastatic tumors to the optic nerve, which would be coded differently.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless another condition is clearly driving the visit.