D48.6 – Neoplasm of uncertain behavior of breast

ICD-10-CM 2027 diagnosis code · Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes

Non-billable header

ICD-10-CM code D48.6
Code
D48.6 (claims format: D486)
Description
Neoplasm of uncertain behavior of breast
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
2. Neoplasms (C00-D49)
Block
D37-D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
Parent codes
D48

Billable codes under D48.6

D48.6 is a header code and cannot be used on claims. Choose the most specific code:

Notes for D48.6

Applicable to:
  • Neoplasm of uncertain behavior of connective tissue of breast
  • Cystosarcoma phyllodes
Excludes1 (not coded here):
  • neoplasm of uncertain behavior of skin of breast (D48.5)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

D48 – Neoplasm of uncertain behavior of other and unspecified sites

Excludes1 (not coded here):
  • neurofibromatosis (nonmalignant) (Q85.0-)

Block D37-D48

Excludes1 (not coded here):
  • neoplasms of unspecified behavior (D49.-)
Notes:
  • Categories D37-D44, and D48 classify by site neoplasms of uncertain behavior, i.e., histologic confirmation whether the neoplasm is malignant or benign cannot be made.

Index terms for D48.6

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in D48

Frequently asked questions

What is ICD-10 code D48.6?

D48.6 is the ICD-10-CM code for neoplasm of uncertain behavior of breast, in the block D37-D48 (Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes).

Is D48.6 a billable code?

No. D48.6 is a header code with more specific child codes; report one of the billable codes listed above.

What category does D48.6 belong to?

It belongs to category D48 – Neoplasm of uncertain behavior of other and unspecified sites.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.