ICD-10-CM > C00-D49 > C76-C80 > C79 > C79.5 C79.5 Secondary malignant neoplasm of bone and bone marrow Non-Billable/Non-Specific Type 1 Excludes secondary carcinoid tumors of bone (C7B.03) Codes C79.51Secondary malignant neoplasm of boneC79.52Secondary malignant neoplasm of bone marrow