C50
⚠ Non-billable (Header)Malignant neoplasm of breast
Neoplasms (C00-D49)
⚠️ This is a category header code — not billable. Use a more specific child code below.
✅ Includes
- • connective tissue of breast
- • Paget's disease of breast
- • Paget's disease of nipple
📋 Code Instructions
- • code to identify estrogen, and other hormones and factors receptor status (Z17.-)
❌ Excludes1
directCannot be coded with C50
- • skin of breast (C44.501, C44.511, C44.521, C44.591)
Child Codes (10)
C50.0Malignant neoplasm of nipple and areolaC50.1Malignant neoplasm of central portion of breastC50.2Malignant neoplasm of upper-inner quadrant of breastC50.3Malignant neoplasm of lower-inner quadrant of breastC50.4Malignant neoplasm of upper-outer quadrant of breastC50.5Malignant neoplasm of lower-outer quadrant of breastC50.6Malignant neoplasm of axillary tail of breastC50.8Malignant neoplasm of overlapping sites of breastC50.9Malignant neoplasm of breast of unspecified siteC50.AMalignant inflammatory neoplasm of breast
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CodeC50
BillableNo — Header code
CategoryNeoplasms (C00-D49)
Excludes11 rule(s)
Excludes20 note(s)
Child codes10
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)