ICD-10 · PDGM grouping
C50-C50 — Malignant neoplasms of breast
Every ICD-10-CM code in this range and the PDGM clinical group CMS assigns to it, read from the CMS grouper crosswalk v07.2.26.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in range
57
No clinical group
19
A period cannot be grouped from these.
Barred as primary
0
CMS rejects these in the primary position.
Where these codes group
38 of the 57 codes in C50-C50 group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases. A further 19 are assigned no clinical group at all, which means a 30-day period cannot be grouped from them.
Code families in C50-C50
One page per three-character family: every code in it, whether it can lead a claim, its clinical group and comorbidity subgroup.
Every code in C50-C50
Descriptions are CMS’s own, abbreviated as CMS abbreviates them.
| Code | Description | Clinical group | Primary position |
|---|---|---|---|
| C50011 | Malignant neoplasm of nipple and areola, right female breast | K | Can lead a claim |
| C50012 | Malignant neoplasm of nipple and areola, left female breast | K | Can lead a claim |
| C50019 | Malignant neoplasm of nipple and areola, unsp female breast | None | Cannot lead a claim |
| C50021 | Malignant neoplasm of nipple and areola, right male breast | K | Can lead a claim |
| C50022 | Malignant neoplasm of nipple and areola, left male breast | K | Can lead a claim |
| C50029 | Malignant neoplasm of nipple and areola, unsp male breast | None | Cannot lead a claim |
| C50111 | Malignant neoplasm of central portion of right female breast | K | Can lead a claim |
| C50112 | Malignant neoplasm of central portion of left female breast | K | Can lead a claim |
| C50119 | Malignant neoplasm of central portion of unsp female breast | None | Cannot lead a claim |
| C50121 | Malignant neoplasm of central portion of right male breast | K | Can lead a claim |
| C50122 | Malignant neoplasm of central portion of left male breast | K | Can lead a claim |
| C50129 | Malignant neoplasm of central portion of unsp male breast | None | Cannot lead a claim |
| C50211 | Malig neoplm of upper-inner quadrant of right female breast | K | Can lead a claim |
| C50212 | Malig neoplasm of upper-inner quadrant of left female breast | K | Can lead a claim |
| C50219 | Malig neoplasm of upper-inner quadrant of unsp female breast | None | Cannot lead a claim |
| C50221 | Malig neoplasm of upper-inner quadrant of right male breast | K | Can lead a claim |
| C50222 | Malig neoplasm of upper-inner quadrant of left male breast | K | Can lead a claim |
| C50229 | Malig neoplasm of upper-inner quadrant of unsp male breast | None | Cannot lead a claim |
| C50311 | Malig neoplm of lower-inner quadrant of right female breast | K | Can lead a claim |
| C50312 | Malig neoplasm of lower-inner quadrant of left female breast | K | Can lead a claim |
| C50319 | Malig neoplasm of lower-inner quadrant of unsp female breast | None | Cannot lead a claim |
| C50321 | Malig neoplasm of lower-inner quadrant of right male breast | K | Can lead a claim |
| C50322 | Malig neoplasm of lower-inner quadrant of left male breast | K | Can lead a claim |
| C50329 | Malig neoplasm of lower-inner quadrant of unsp male breast | None | Cannot lead a claim |
| C50411 | Malig neoplm of upper-outer quadrant of right female breast | K | Can lead a claim |
| C50412 | Malig neoplasm of upper-outer quadrant of left female breast | K | Can lead a claim |
| C50419 | Malig neoplasm of upper-outer quadrant of unsp female breast | None | Cannot lead a claim |
| C50421 | Malig neoplasm of upper-outer quadrant of right male breast | K | Can lead a claim |
| C50422 | Malig neoplasm of upper-outer quadrant of left male breast | K | Can lead a claim |
| C50429 | Malig neoplasm of upper-outer quadrant of unsp male breast | None | Cannot lead a claim |
| C50511 | Malig neoplm of lower-outer quadrant of right female breast | K | Can lead a claim |
| C50512 | Malig neoplasm of lower-outer quadrant of left female breast | K | Can lead a claim |
| C50519 | Malig neoplasm of lower-outer quadrant of unsp female breast | None | Cannot lead a claim |
| C50521 | Malig neoplasm of lower-outer quadrant of right male breast | K | Can lead a claim |
| C50522 | Malig neoplasm of lower-outer quadrant of left male breast | K | Can lead a claim |
| C50529 | Malig neoplasm of lower-outer quadrant of unsp male breast | None | Cannot lead a claim |
| C50611 | Malignant neoplasm of axillary tail of right female breast | K | Can lead a claim |
| C50612 | Malignant neoplasm of axillary tail of left female breast | K | Can lead a claim |
| C50619 | Malignant neoplasm of axillary tail of unsp female breast | None | Cannot lead a claim |
| C50621 | Malignant neoplasm of axillary tail of right male breast | K | Can lead a claim |
| C50622 | Malignant neoplasm of axillary tail of left male breast | K | Can lead a claim |
| C50629 | Malignant neoplasm of axillary tail of unsp male breast | None | Cannot lead a claim |
| C50811 | Malignant neoplasm of ovrlp sites of right female breast | K | Can lead a claim |
| C50812 | Malignant neoplasm of ovrlp sites of left female breast | K | Can lead a claim |
| C50819 | Malignant neoplasm of ovrlp sites of unsp female breast | None | Cannot lead a claim |
| C50821 | Malignant neoplasm of overlapping sites of right male breast | K | Can lead a claim |
| C50822 | Malignant neoplasm of overlapping sites of left male breast | K | Can lead a claim |
| C50829 | Malignant neoplasm of overlapping sites of unsp male breast | None | Cannot lead a claim |
| C50911 | Malignant neoplasm of unsp site of right female breast | K | Can lead a claim |
| C50912 | Malignant neoplasm of unspecified site of left female breast | K | Can lead a claim |
| C50919 | Malignant neoplasm of unsp site of unspecified female breast | None | Cannot lead a claim |
| C50921 | Malignant neoplasm of unspecified site of right male breast | K | Can lead a claim |
| C50922 | Malignant neoplasm of unspecified site of left male breast | K | Can lead a claim |
| C50929 | Malignant neoplasm of unsp site of unspecified male breast | None | Cannot lead a claim |
| C50A0 | Malignant inflammatory neoplasm of unspecified breast | None | Cannot lead a claim |
| C50A1 | Malignant inflammatory neoplasm of right breast | K | Can lead a claim |
| C50A2 | Malignant inflammatory neoplasm of left breast | K | Can lead a claim |
Source: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01. 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.
The monthly home health regs digest
What CMS changed, what's due next, and what to do about it — one email a month, no fluff. Read the first issue