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C50.919 — Malignant neoplasm of unspecified site of unspecified female breast
C50.919
What this code means
Cancer that starts in the breast tissue of a woman.
Also called: breast cancer, female breast cancer.
When this code is used
Used for malignant neoplasm of the female breast when the site within the breast and the side are not specified.
Where it sits in ICD-10-CM
Code C50.919 belongs to Chapter 2: Neoplasms, which covers codes C00–D49 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.
Learn more about this condition
Related procedures & tests
Related anatomy
Watch: related videos
Frequently asked questions
What is ICD-10-CM code C50.919?
C50.919 is the ICD-10-CM diagnosis code for “Malignant neoplasm of unspecified site of unspecified female breast”. Cancer that starts in the breast tissue of a woman.
When is code C50.919 used?
Used for malignant neoplasm of the female breast when the site within the breast and the side are not specified. It belongs to Chapter 2 of ICD-10-CM (Neoplasms).
This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.