ICD-10-CM > C00-D49 > C69-C72 > C72 > C72.4 C72.4 Malignant neoplasm of acoustic nerve Non-Billable/Non-Specific Codes C72.40Malignant neoplasm of unspecified acoustic nerveC72.41Malignant neoplasm of right acoustic nerveC72.42Malignant neoplasm of left acoustic nerve