Malignant neoplasms of breast (C50) ICD-10-CM
The C50 section covers malignant neoplasms of breast with 86 ICD-10-CM diagnosis codes, of which 57 are billable in fiscal year 2026. The section is organized into the 1 code ranges listed below.
Code Ranges in This Section 1 ranges · 86 codes
| Code Range | Title | Codes | Billable |
|---|---|---|---|
| C50 | Malignant neoplasm of breast (C50) | 86 | 57 |
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the C50 Code Range
ICD-10 codes C50 and its subcategories are specifically used for classifying malignant neoplasms of the breast. These codes cover various locations within the breast, including the nipple and areola, central portion, quadrants, axillary tail, overlapping sites, and unspecified sites, with distinctions by side and gender where applicable.
The detailed range of C50 codes captures all primary malignant breast tumors, from the nipple and areola (such as C50.0 and its female and male subcodes) to specific quadrants like upper-inner (C50.2), lower-inner (C50.3), upper-outer (C50.4), and lower-outer breast quadrants (C50.5). Codes also exist for tumors of the axillary tail (C50.6) and overlapping breast sites (C50.8). The classification further differentiates malignancies by sex and exact location, aiding precise clinical documentation and billing. For example, C50.019 refers to malignant neoplasm of the nipple and areola in females and is associated with terms like "Primary Paget disease of nipple" and "Malignant neoplasm of nipple," helping coders connect common clinical terms to the right codes. Unspecified site codes such as C50.9 include synonyms like "infiltrating lobular carcinoma" and "HER2-positive carcinoma," reflecting diverse breast cancer subtypes. These codings are essential for identifying the cancer location and type, from initial diagnosis to treatment planning and outcomes tracking.
Questions About This Page
How many codes are in the C50 range?
The C50 range contains 86 ICD-10-CM diagnosis codes in FY 2026. 57 of them are billable, and the rest are category headers that organize the section.
What conditions does C50 cover?
The range covers malignant neoplasms of breast. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
