C79.81
BillableSecondary malignant neoplasm of breast
C79.81 is the ICD-10-CM code for Secondary malignant neoplasm of breast. It is a billable, specific code valid for reimbursement.
C00-D49 Neoplasms
What this means — in plain language
MedlinePlus · NIHWhat is breast cancer? Breast cancer is a cancer that starts in breast tissue. It happens when cells in the breast change and grow out of control. New cells grow even when you don't need them, and old cells don't die when they should. These extra cells can form a mass called a tumor. Sometimes the cancer does not spread any further. This is called "in situ." If the cancer spreads outside the breast, the cancer is…
Read more about Breast Cancer at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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