ICD-10-CM · Category
C50.9 — Malignant neoplasm of breast of unspecified site
Chapter C00-D49: Neoplasms
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Related diagnoses
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 breast
Common questions about C50.9 (Malignant neoplasm of breast of unspecified site)
What does ICD-10 code C50.9 mean?
C50.9 is the ICD-10-CM 2025 code for Malignant neoplasm of breast of unspecified site. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.
Is C50.9 a billable diagnosis code?
C50.9 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under C50.9. Browse the sub-codes listed on this page.
Which ICD-10 chapter does C50.9 belong to?
C50.9 belongs to the chapter "Neoplasms" (codes C00-D49). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Malignant neoplasm of breast of unspecified site?
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Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗