C44.511 ICD-10-CM Code: Basal cell carcinoma of skin of breast
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FY 2026 Apr update / Neoplasms (C00-D49) / Melanoma and other malignant neoplasms of skin (C43-C44)
C44.511
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceBasal cell carcinoma of skin of breast
A basal cell carcinoma that develops on the skin of the breast area. This is a slow-growing skin cancer on the chest wall.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for C44.511 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for C44.511 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for C44.511 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for C44.511 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for C44.511 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for C44.511 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for C44.511 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is C44.511 an HCC code?
No. C44.511 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
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
C44.511 is the ICD-10-CM diagnosis code for basal cell carcinoma of skin of breast. A basal cell carcinoma that develops on the skin of the breast area. This is a slow-growing skin cancer on the chest wall. C44.511 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering melanoma and other malignant neoplasms of skin (c43-c44).
C44.511 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Ensure documentation specifies this is skin cancer, not breast tissue cancer.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for C44.511 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Ensure documentation specifies this is skin cancer, not breast tissue cancer
- •Verify basal cell type is confirmed by pathology