ICD10
ICD-10 Code D48.6: Neoplasm of uncertain behavior of breast
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Neoplasms (C00-D49).
When is it used?
- May be used when a clinician documents neoplasm of uncertain behavior of breast in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
2Neoplasms (C00-D49)
block
D37-D48Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
category
D48Neoplasm of uncertain behavior of other and unspecified sites
currentD48
Official coding notes
Inclusion terms
- Neoplasm of uncertain behavior of connective tissue of breast
- Cystosarcoma phyllodes
Excludes1 (do not code together)
- neoplasm of uncertain behavior of skin of breast (D48.5)
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
OncologistGeneral Physician
Related codes
Sibling codes
D48.0Neoplasm of uncertain behavior of bone and articular cartilagebillableD48.1Neoplasm of uncertain behavior of connective and other soft tissueD48.2Neoplasm of uncertain behavior of peripheral nerves and autonomic nervous systembillableD48.3Neoplasm of uncertain behavior of retroperitoneumbillableD48.4Neoplasm of uncertain behavior of peritoneumbillableD48.5Neoplasm of uncertain behavior of skinbillableD48.7Neoplasm of uncertain behavior of other specified sitesbillableD48.9Neoplasm of uncertain behavior, unspecifiedbillable
Mapped diagnoses and classifications
SNOMED_CT 721600008high
Aggressive fibromatosis of breast
Source: SNOMED International ICD-10 map
SNOMED_CT 15952661000119101high
Bilateral neoplasm of uncertain behaviour of breasts
Source: SNOMED International ICD-10 map
SNOMED_CT 1081431000119104high
Borderline phyllodes neoplasm of left breast
Source: SNOMED International ICD-10 map
SNOMED_CT 1081441000119108high
Borderline phyllodes neoplasm of right breast
Source: SNOMED International ICD-10 map
SNOMED_CT 16067891000119105high
Borderline phyllodes tumor of bilateral breasts
Source: SNOMED International ICD-10 map
SNOMED_CT 1306308001high
Neoplasm of areola
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
D48.6
Replacement codes
D48.60 — Neoplasm of uncertain behavior of unspecified breastD48.61 — Neoplasm of uncertain behavior of right breastD48.62 — Neoplasm of uncertain behavior of left breast
Common synonyms
Neoplasm of uncertain behavior of breast
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.