D24.9 ICD-10-CM Code: Benign neoplasm of unspecified breast
D24.9 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools
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FY 2026 Apr update / Neoplasms (C00-D49) / Benign neoplasms, except benign neuroendocrine tumors (D10-D36)
D24.9
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceBenign neoplasm of unspecified breast
A noncancerous breast tumor when the specific breast (left or right) is not specified in the documentation.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for D24.9. Check the code and parent instructions in the Code Book.
Excludes 2
Official- adenofibrosis of breast (N60.2)Inherited from D24
- benign cyst of breast (N60.-)Inherited from D24
- benign mammary dysplasia (N60.-)Inherited from D24
- benign neoplasm of skin of breast (D22.5, D23.5)Inherited from D24
- fibrocystic disease of breast (N60.-)Inherited from D24
Related Codes
Includes
Official- benign neoplasm of connective tissue of breastInherited from D24
- benign neoplasm of soft parts of breastInherited from D24
- fibroadenoma of breastInherited from D24
Excludes 1
OfficialNo Excludes 1 notes are included in this display for D24.9. Check the code and parent instructions in the Code Book.
Code First
OfficialNo Code First sequencing instructions are included in this display for D24.9. Check the code and parent instructions in the Code Book.
Use Additional
OfficialNo Use Additional Code instructions are included in this display for D24.9. Check the code and parent instructions in the Code Book.
Code Also
OfficialNo Code Also instructions are included in this display for D24.9. Check the code and parent instructions in the Code Book.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is D24.9 an HCC code?
No. D24.9 is a billable ICD-10-CM code with no mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models.
- Code
- D24.9
- Description
- Benign neoplasm of unspecified breast
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
D24.9 is the ICD-10-CM diagnosis code for benign neoplasm of unspecified breast. A noncancerous breast tumor when the specific breast (left or right) is not specified in the documentation. D24.9 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering benign neoplasms, except benign neuroendocrine tumors (d10-d36).
D24.9 is a billable ICD-10-CM code, but the current payload does not show a mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.
Query the provider if laterality is not documented, as D24.1 or D24.2 may be more appropriate.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for D24.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.