ICD-10-CM > C00-D49 > C50-C50 > C50 > C50.4 > C50.41 C50.41 Malignant neoplasm of upper-outer quadrant of breast, female Non-Billable/Non-Specific Codes C50.411Malignant neoplasm of upper-outer quadrant of right female breastC50.412Malignant neoplasm of upper-outer quadrant of left female breastC50.419Malignant neoplasm of upper-outer quadrant of unspecified female breast