ICD-10-CM > C00-D49 > C51-C58 > C56 C56 Malignant neoplasm of ovary Non-Billable/Non-Specific Use Additional code to identify any functional activity Codes C56.1Malignant neoplasm of right ovaryC56.2Malignant neoplasm of left ovaryC56.3Malignant neoplasm of bilateral ovariesC56.9Malignant neoplasm of unspecified ovary