ICD-10-CM > C00-D49 > C50-C50 > C50 > C50.1 > C50.11 C50.11 Malignant neoplasm of central portion of breast, female Non-Billable/Non-Specific Codes C50.111Malignant neoplasm of central portion of right female breastC50.112Malignant neoplasm of central portion of left female breastC50.119Malignant neoplasm of central portion of unspecified female breast