C50
ICD-10Non-billable categoryMalignant neoplasm of breast
Official ICD-10-CM descriptor (FY2026)
Malignant neoplasm of breast
C50 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Includes
- connective tissue of breast
- Paget's disease of breast
- Paget's disease of nipple
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- skin of breast (C44.501, C44.511, C44.521, C44.591)
Use additional code
Report an additional code to identify the associated condition.
- code to identify estrogen, and other hormones and factors receptor status (Z17.-)
More specific codes under C50
- C50.0Malignant neoplasm of nipple and areolacategory
- C50.1Malignant neoplasm of central portion of breastcategory
- C50.2Malignant neoplasm of upper-inner quadrant of breastcategory
- C50.3Malignant neoplasm of lower-inner quadrant of breastcategory
- C50.4Malignant neoplasm of upper-outer quadrant of breastcategory
- C50.5Malignant neoplasm of lower-outer quadrant of breastcategory
- C50.6Malignant neoplasm of axillary tail of breastcategory
- C50.8Malignant neoplasm of overlapping sites of breastcategory
- C50.9Malignant neoplasm of breast of unspecified sitecategory
- C50.AMalignant inflammatory neoplasm of breastcategory
Where this code sits
- Chapter
- 2. Neoplasms (C00-D49)
Krasyn Codes for Chrome
Review coding suggestions beside a validated web workflow. Private pilot.
Request pilot accessSource
ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.