ICD-10 · PDGM grouping
C50 Malignant neoplasm of breast
All 57 codes in the C50 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
57
Can lead a claim
38
Cannot lead a claim
19
What CMS assigns to C50
38 of the 57 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases; 19 are assigned no clinical group. 38 of the 57 count toward the Malignant Neoplasm of Breast comorbidity subgroup; 19 are assigned none. 38 of the 57 can lead a claim.
- Malignant Neoplasm of Breast
Every code in C50
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| C50.0 Malignant neoplasm of nipple and areola | ||||
| C50.01 Malignant neoplasm of nipple and areola, female | ||||
| C50.011 | Malignant neoplasm of nipple and areola, right female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.012 | Malignant neoplasm of nipple and areola, left female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.019 | Malignant neoplasm of nipple and areola, unspecified female breastCMS: Malignant neoplasm of nipple and areola, unsp female breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.02 Malignant neoplasm of nipple and areola, male | ||||
| C50.021 | Malignant neoplasm of nipple and areola, right male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.022 | Malignant neoplasm of nipple and areola, left male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.029 | Malignant neoplasm of nipple and areola, unspecified male breastCMS: Malignant neoplasm of nipple and areola, unsp male breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.1 Malignant neoplasm of central portion of breast | ||||
| C50.11 Malignant neoplasm of central portion of breast, female | ||||
| C50.111 | Malignant neoplasm of central portion of right female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.112 | Malignant neoplasm of central portion of left female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.119 | Malignant neoplasm of central portion of unspecified female breastCMS: Malignant neoplasm of central portion of unsp female breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.12 Malignant neoplasm of central portion of breast, male | ||||
| C50.121 | Malignant neoplasm of central portion of right male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.122 | Malignant neoplasm of central portion of left male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.129 | Malignant neoplasm of central portion of unspecified male breastCMS: Malignant neoplasm of central portion of unsp male breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.2 Malignant neoplasm of upper-inner quadrant of breast | ||||
| C50.21 Malignant neoplasm of upper-inner quadrant of breast, female | ||||
| C50.211 | Malignant neoplasm of upper-inner quadrant of right female breastCMS: Malig neoplm of upper-inner quadrant of right female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.212 | Malignant neoplasm of upper-inner quadrant of left female breastCMS: Malig neoplasm of upper-inner quadrant of left female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.219 | Malignant neoplasm of upper-inner quadrant of unspecified female breastCMS: Malig neoplasm of upper-inner quadrant of unsp female breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.22 Malignant neoplasm of upper-inner quadrant of breast, male | ||||
| C50.221 | Malignant neoplasm of upper-inner quadrant of right male breastCMS: Malig neoplasm of upper-inner quadrant of right male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.222 | Malignant neoplasm of upper-inner quadrant of left male breastCMS: Malig neoplasm of upper-inner quadrant of left male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.229 | Malignant neoplasm of upper-inner quadrant of unspecified male breastCMS: Malig neoplasm of upper-inner quadrant of unsp male breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.3 Malignant neoplasm of lower-inner quadrant of breast | ||||
| C50.31 Malignant neoplasm of lower-inner quadrant of breast, female | ||||
| C50.311 | Malignant neoplasm of lower-inner quadrant of right female breastCMS: Malig neoplm of lower-inner quadrant of right female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.312 | Malignant neoplasm of lower-inner quadrant of left female breastCMS: Malig neoplasm of lower-inner quadrant of left female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.319 | Malignant neoplasm of lower-inner quadrant of unspecified female breastCMS: Malig neoplasm of lower-inner quadrant of unsp female breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.32 Malignant neoplasm of lower-inner quadrant of breast, male | ||||
| C50.321 | Malignant neoplasm of lower-inner quadrant of right male breastCMS: Malig neoplasm of lower-inner quadrant of right male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.322 | Malignant neoplasm of lower-inner quadrant of left male breastCMS: Malig neoplasm of lower-inner quadrant of left male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.329 | Malignant neoplasm of lower-inner quadrant of unspecified male breastCMS: Malig neoplasm of lower-inner quadrant of unsp male breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.4 Malignant neoplasm of upper-outer quadrant of breast | ||||
| C50.41 Malignant neoplasm of upper-outer quadrant of breast, female | ||||
| C50.411 | Malignant neoplasm of upper-outer quadrant of right female breastCMS: Malig neoplm of upper-outer quadrant of right female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.412 | Malignant neoplasm of upper-outer quadrant of left female breastCMS: Malig neoplasm of upper-outer quadrant of left female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.419 | Malignant neoplasm of upper-outer quadrant of unspecified female breastCMS: Malig neoplasm of upper-outer quadrant of unsp female breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.42 Malignant neoplasm of upper-outer quadrant of breast, male | ||||
| C50.421 | Malignant neoplasm of upper-outer quadrant of right male breastCMS: Malig neoplasm of upper-outer quadrant of right male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.422 | Malignant neoplasm of upper-outer quadrant of left male breastCMS: Malig neoplasm of upper-outer quadrant of left male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.429 | Malignant neoplasm of upper-outer quadrant of unspecified male breastCMS: Malig neoplasm of upper-outer quadrant of unsp male breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.5 Malignant neoplasm of lower-outer quadrant of breast | ||||
| C50.51 Malignant neoplasm of lower-outer quadrant of breast, female | ||||
| C50.511 | Malignant neoplasm of lower-outer quadrant of right female breastCMS: Malig neoplm of lower-outer quadrant of right female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.512 | Malignant neoplasm of lower-outer quadrant of left female breastCMS: Malig neoplasm of lower-outer quadrant of left female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.519 | Malignant neoplasm of lower-outer quadrant of unspecified female breastCMS: Malig neoplasm of lower-outer quadrant of unsp female breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.52 Malignant neoplasm of lower-outer quadrant of breast, male | ||||
| C50.521 | Malignant neoplasm of lower-outer quadrant of right male breastCMS: Malig neoplasm of lower-outer quadrant of right male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.522 | Malignant neoplasm of lower-outer quadrant of left male breastCMS: Malig neoplasm of lower-outer quadrant of left male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.529 | Malignant neoplasm of lower-outer quadrant of unspecified male breastCMS: Malig neoplasm of lower-outer quadrant of unsp male breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.6 Malignant neoplasm of axillary tail of breast | ||||
| C50.61 Malignant neoplasm of axillary tail of breast, female | ||||
| C50.611 | Malignant neoplasm of axillary tail of right female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.612 | Malignant neoplasm of axillary tail of left female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.619 | Malignant neoplasm of axillary tail of unspecified female breastCMS: Malignant neoplasm of axillary tail of unsp female breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.62 Malignant neoplasm of axillary tail of breast, male | ||||
| C50.621 | Malignant neoplasm of axillary tail of right male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.622 | Malignant neoplasm of axillary tail of left male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.629 | Malignant neoplasm of axillary tail of unspecified male breastCMS: Malignant neoplasm of axillary tail of unsp male breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.8 Malignant neoplasm of overlapping sites of breast | ||||
| C50.81 Malignant neoplasm of overlapping sites of breast, female | ||||
| C50.811 | Malignant neoplasm of overlapping sites of right female breastCMS: Malignant neoplasm of ovrlp sites of right female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.812 | Malignant neoplasm of overlapping sites of left female breastCMS: Malignant neoplasm of ovrlp sites of left female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.819 | Malignant neoplasm of overlapping sites of unspecified female breastCMS: Malignant neoplasm of ovrlp sites of unsp female breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.82 Malignant neoplasm of overlapping sites of breast, male | ||||
| C50.821 | Malignant neoplasm of overlapping sites of right male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.822 | Malignant neoplasm of overlapping sites of left male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.829 | Malignant neoplasm of overlapping sites of unspecified male breastCMS: Malignant neoplasm of overlapping sites of unsp male breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.9 Malignant neoplasm of breast of unspecified site | ||||
| C50.91 Malignant neoplasm of breast of unspecified site, female | ||||
| C50.911 | Malignant neoplasm of unspecified site of right female breastCMS: Malignant neoplasm of unsp site of right female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.912 | Malignant neoplasm of unspecified site of left female breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.919 | Malignant neoplasm of unspecified site of unspecified female breastCMS: Malignant neoplasm of unsp site of unspecified female breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.92 Malignant neoplasm of breast of unspecified site, male | ||||
| C50.921 | Malignant neoplasm of unspecified site of right male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.922 | Malignant neoplasm of unspecified site of left male breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.929 | Malignant neoplasm of unspecified site of unspecified male breastCMS: Malignant neoplasm of unsp site of unspecified male breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.A Malignant inflammatory neoplasm of breast | ||||
| C50.A0 | Malignant inflammatory neoplasm of unspecified breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C50.A1 | Malignant inflammatory neoplasm of right breast | Can lead a claim | K | Malignant Neoplasm of Breast |
| C50.A2 | Malignant inflammatory neoplasm of left breast | Can lead a claim | K | Malignant Neoplasm of Breast |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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