ICD-10-CM > C00-D49 > C43-C44 > C44 > C44.5 > C44.50 C44.50 Unspecified malignant neoplasm of skin of trunk Non-Billable/Non-Specific Codes C44.500Unspecified malignant neoplasm of anal skinC44.501Unspecified malignant neoplasm of skin of breastC44.509Unspecified malignant neoplasm of skin of other part of trunk