D48.6
ICD-10Non-billable categoryNeoplasm of uncertain behavior of breast
Official ICD-10-CM descriptor (FY2026)
Neoplasm of uncertain behavior of breast
D48.6 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Inclusion terms
- Neoplasm of uncertain behavior of connective tissue of breast
- Cystosarcoma phyllodes
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- neoplasm of uncertain behavior of skin of breast (D48.5)
ICD-10-CM FY2026 defines 3 codes beneath D48.6. See the ICD-10-CM index for what this site publishes.
Related codes in D48
- D48.0Neoplasm of uncertain behavior of bone/artic cartl
- D48.1Neoplasm of uncertain behavior of connctv/soft tisscategory
- D48.2Neoplm of uncrt behav of prph nerves and autonm nervous sys
- D48.3Neoplasm of uncertain behavior of retroperitoneum
- D48.4Neoplasm of uncertain behavior of peritoneum
- D48.5Neoplasm of uncertain behavior of skin
- D48.7Neoplasm of uncertain behavior of other specified sites
- D48.9Neoplasm of uncertain behavior, unspecified
Where this code sits
- Chapter
- 2. Neoplasms (C00-D49)
- Parent code
- D48
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.