ICD-10-CM > C00-D49 > C50-C50 > C50 > C50.6 > C50.62 C50.62 Malignant neoplasm of axillary tail of breast, male Non-Billable/Non-Specific Codes C50.621Malignant neoplasm of axillary tail of right male breastC50.622Malignant neoplasm of axillary tail of left male breastC50.629Malignant neoplasm of axillary tail of unspecified male breast