ICD-10-CM > C00-D49 > C69-C72 > C72 > C72.3 C72.3 Malignant neoplasm of optic nerve Non-Billable/Non-Specific Codes C72.30Malignant neoplasm of unspecified optic nerveC72.31Malignant neoplasm of right optic nerveC72.32Malignant neoplasm of left optic nerve