| C50 | Malignant neoplasm of breast | NON-BILLABLE CODE |
| C50.0 | Malignant neoplasm of nipple and areola | NON-BILLABLE CODE |
| C50.01 | Malignant neoplasm of nipple and areola, female | NON-BILLABLE CODE |
| C50.011 | Malignant neoplasm of nipple and areola, right female breast | BILLABLE CODE |
| C50.012 | Malignant neoplasm of nipple and areola, left female breast | BILLABLE CODE |
| C50.019 | Malignant neoplasm of nipple and areola, unspecified female breast | BILLABLE CODE |
| C50.02 | Malignant neoplasm of nipple and areola, male | NON-BILLABLE CODE |
| C50.021 | Malignant neoplasm of nipple and areola, right male breast | BILLABLE CODE |
| C50.022 | Malignant neoplasm of nipple and areola, left male breast | BILLABLE CODE |
| C50.029 | Malignant neoplasm of nipple and areola, unspecified male breast | BILLABLE CODE |
| C50.1 | Malignant neoplasm of central portion of breast | NON-BILLABLE CODE |
| C50.11 | Malignant neoplasm of central portion of breast, female | NON-BILLABLE CODE |
| C50.111 | Malignant neoplasm of central portion of right female breast | BILLABLE CODE |
| C50.112 | Malignant neoplasm of central portion of left female breast | BILLABLE CODE |
| C50.119 | Malignant neoplasm of central portion of unspecified female breast | BILLABLE CODE |
| C50.12 | Malignant neoplasm of central portion of breast, male | NON-BILLABLE CODE |
| C50.121 | Malignant neoplasm of central portion of right male breast | BILLABLE CODE |
| C50.122 | Malignant neoplasm of central portion of left male breast | BILLABLE CODE |
| C50.129 | Malignant neoplasm of central portion of unspecified male breast | BILLABLE CODE |
| C50.2 | Malignant neoplasm of upper-inner quadrant of breast | NON-BILLABLE CODE |
| C50.21 | Malignant neoplasm of upper-inner quadrant of breast, female | NON-BILLABLE CODE |
| C50.211 | Malignant neoplasm of upper-inner quadrant of right female breast | BILLABLE CODE |
| C50.212 | Malignant neoplasm of upper-inner quadrant of left female breast | BILLABLE CODE |
| C50.219 | Malignant neoplasm of upper-inner quadrant of unspecified female breast | BILLABLE CODE |
| C50.22 | Malignant neoplasm of upper-inner quadrant of breast, male | NON-BILLABLE CODE |
| C50.221 | Malignant neoplasm of upper-inner quadrant of right male breast | BILLABLE CODE |
| C50.222 | Malignant neoplasm of upper-inner quadrant of left male breast | BILLABLE CODE |
| C50.229 | Malignant neoplasm of upper-inner quadrant of unspecified male breast | BILLABLE CODE |
| C50.3 | Malignant neoplasm of lower-inner quadrant of breast | NON-BILLABLE CODE |
| C50.31 | Malignant neoplasm of lower-inner quadrant of breast, female | NON-BILLABLE CODE |
| C50.311 | Malignant neoplasm of lower-inner quadrant of right female breast | BILLABLE CODE |
| C50.312 | Malignant neoplasm of lower-inner quadrant of left female breast | BILLABLE CODE |
| C50.319 | Malignant neoplasm of lower-inner quadrant of unspecified female breast | BILLABLE CODE |
| C50.32 | Malignant neoplasm of lower-inner quadrant of breast, male | NON-BILLABLE CODE |
| C50.321 | Malignant neoplasm of lower-inner quadrant of right male breast | BILLABLE CODE |
| C50.322 | Malignant neoplasm of lower-inner quadrant of left male breast | BILLABLE CODE |
| C50.329 | Malignant neoplasm of lower-inner quadrant of unspecified male breast | BILLABLE CODE |
| C50.4 | Malignant neoplasm of upper-outer quadrant of breast | NON-BILLABLE CODE |
| C50.41 | Malignant neoplasm of upper-outer quadrant of breast, female | NON-BILLABLE CODE |
| C50.411 | Malignant neoplasm of upper-outer quadrant of right female breast | BILLABLE CODE |
| C50.412 | Malignant neoplasm of upper-outer quadrant of left female breast | BILLABLE CODE |
| C50.419 | Malignant neoplasm of upper-outer quadrant of unspecified female breast | BILLABLE CODE |
| C50.42 | Malignant neoplasm of upper-outer quadrant of breast, male | NON-BILLABLE CODE |
| C50.421 | Malignant neoplasm of upper-outer quadrant of right male breast | BILLABLE CODE |
| C50.422 | Malignant neoplasm of upper-outer quadrant of left male breast | BILLABLE CODE |
| C50.429 | Malignant neoplasm of upper-outer quadrant of unspecified male breast | BILLABLE CODE |
| C50.5 | Malignant neoplasm of lower-outer quadrant of breast | NON-BILLABLE CODE |
| C50.51 | Malignant neoplasm of lower-outer quadrant of breast, female | NON-BILLABLE CODE |
| C50.511 | Malignant neoplasm of lower-outer quadrant of right female breast | BILLABLE CODE |
| C50.512 | Malignant neoplasm of lower-outer quadrant of left female breast | BILLABLE CODE |
| C50.52 | Malignant neoplasm of lower-outer quadrant of breast, male | NON-BILLABLE CODE |
| C50.521 | Malignant neoplasm of lower-outer quadrant of right male breast | BILLABLE CODE |
| C50.522 | Malignant neoplasm of lower-outer quadrant of left male breast | BILLABLE CODE |
| C50.529 | Malignant neoplasm of lower-outer quadrant of unspecified male breast | BILLABLE CODE |
| C50.6 | Malignant neoplasm of axillary tail of breast | NON-BILLABLE CODE |
| C50.61 | Malignant neoplasm of axillary tail of breast, female | NON-BILLABLE CODE |
| C50.611 | Malignant neoplasm of axillary tail of right female breast | BILLABLE CODE |
| C50.612 | Malignant neoplasm of axillary tail of left female breast | BILLABLE CODE |
| C50.619 | Malignant neoplasm of axillary tail of unspecified female breast | BILLABLE CODE |
| C50.62 | Malignant neoplasm of axillary tail of breast, male | NON-BILLABLE CODE |
| C50.621 | Malignant neoplasm of axillary tail of right male breast | BILLABLE CODE |
| C50.622 | Malignant neoplasm of axillary tail of left male breast | BILLABLE CODE |
| C50.629 | Malignant neoplasm of axillary tail of unspecified male breast | BILLABLE CODE |
| C50.8 | Malignant neoplasm of overlapping sites of breast | NON-BILLABLE CODE |
| C50.81 | Malignant neoplasm of overlapping sites of breast, female | NON-BILLABLE CODE |
| C50.811 | Malignant neoplasm of overlapping sites of right female breast | BILLABLE CODE |
| C50.812 | Malignant neoplasm of overlapping sites of left female breast | BILLABLE CODE |
| C50.819 | Malignant neoplasm of overlapping sites of unspecified female breast | BILLABLE CODE |
| C50.82 | Malignant neoplasm of overlapping sites of breast, male | NON-BILLABLE CODE |
| C50.821 | Malignant neoplasm of overlapping sites of right male breast | BILLABLE CODE |
| C50.822 | Malignant neoplasm of overlapping sites of left male breast | BILLABLE CODE |
| C50.829 | Malignant neoplasm of overlapping sites of unspecified male breast | BILLABLE CODE |
| C50.9 | Malignant neoplasm of breast of unspecified site | NON-BILLABLE CODE |
| C50.91 | Malignant neoplasm of breast of unspecified site, female | NON-BILLABLE CODE |
| C50.911 | Malignant neoplasm of unspecified site of right female breast | BILLABLE CODE |
| C50.912 | Malignant neoplasm of unspecified site of left female breast | BILLABLE CODE |
| C50.919 | Malignant neoplasm of unspecified site of unspecified female breast | BILLABLE CODE |
| C50.92 | Malignant neoplasm of breast of unspecified site, male | NON-BILLABLE CODE |
| C50.921 | Malignant neoplasm of unspecified site of right male breast | BILLABLE CODE |
| C50.922 | Malignant neoplasm of unspecified site of left male breast | BILLABLE CODE |
| C50.929 | Malignant neoplasm of unspecified site of unspecified male breast | BILLABLE CODE |
