C79.81Billable
Secondary malignant neoplasm of breast
- Chapter
- 2. Neoplasms
- Category
- C79
- Effective date
- October 1, 2026
Related codes in category C79
C79Secondary malignant neoplasm of other and unspecified sitesC79.0Secondary malignant neoplasm of kidney and renal pelvisC79.00Secondary malignant neoplasm of unsp kidney and renal pelvisYesC79.01Secondary malignant neoplasm of r kidney and renal pelvisYesC79.02Secondary malignant neoplasm of left kidney and renal pelvisYesC79.1Sec malig neoplm of bladder and oth and unsp urinary organsC79.10Secondary malignant neoplasm of unspecified urinary organsYesC79.11Secondary malignant neoplasm of bladderYesC79.19Secondary malignant neoplasm of other urinary organsYesC79.2Secondary malignant neoplasm of skinYesC79.3Secondary malignant neoplasm of brain and cerebral meningesC79.31Secondary malignant neoplasm of brainYes
Frequently asked questions
What is ICD-10 code C79.81?
C79.81 is an ICD-10-CM diagnosis code for Secondary malignant neoplasm of breast.
Is C79.81 a billable code?
Yes. C79.81 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is C79.81 in?
C79.81 falls under Chapter 2: Neoplasms.
When did C79.81 become effective?
C79.81 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to C79.81?
C79.81 belongs to category C79, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.