ICD-10-CM 2027
ICD-10 code for Cystosarcoma phyllodes
From the official ICD-10-CM alphabetic index entry “Cystosarcoma phyllodes”. Page updated September 29, 2026.
About coding Cystosarcoma phyllodes
The ICD-10-CM code for Cystosarcoma phyllodes is D48.6 (Neoplasm of uncertain behavior of breast). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on D48.6.
Within D48 (neoplasm of uncertain behavior of other and unspecified sites), D48.6 is specifically for neoplasm of uncertain behavior of breast. Related codes cover behavior of bone and articular cartilage (D48.0), behavior of connective and other soft tissue (D48.1), behavior of peripheral nerves and autonomic nervous system (D48.2), behavior of retroperitoneum (D48.3), behavior of peritoneum (D48.4), behavior of skin (D48.5), behavior of other specified sites (D48.7) and behavior, unspecified (D48.9).
To report this condition, pick the subcode that matches the documentation: D48.60 (breast), D48.61 (breast) and D48.62 (breast).
Don't report D48.6 together with the conditions in its Excludes1 note: neoplasm of uncertain behavior of skin of breast (D48.5).
More specific Cystosarcoma phyllodes codes (official index)
- benign D24 — Benign neoplasm of breast
- malignant
Don't confuse with (Excludes1 for D48.6)
- neoplasm of uncertain behavior of skin of breast (D48.5)
Common questions about Cystosarcoma phyllodes ICD-10 codes
What is the ICD-10 code for Cystosarcoma phyllodes?
- D48.6 — Neoplasm of uncertain behavior of breast (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: D24.
What is the ICD-10 code for benign cystosarcoma phyllodes?
- D24 — Benign neoplasm of breast (header code; choose a more specific subcode).
Is D48.6 billable?
- No. D48.6 is a header code. Report one of its more specific subcodes instead.