D05.80 ICD-10-CM Code: Other specified type of carcinoma in situ of unspecified breast
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FY 2026 Apr update / Neoplasms (C00-D49) / In situ neoplasms (D00-D09)
D05.80
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOther specified type of carcinoma in situ of unspecified breast
Other types of pre-cancerous breast cell abnormalities that have not spread beyond the breast tissue, but the specific breast (left or right) is not documented.
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
Code Trumping
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for D05.80 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for D05.80 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for D05.80 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for D05.80 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for D05.80 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for D05.80 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for D05.80 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 D05.80 an HCC code?
No. D05.80 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
D05.80 is the ICD-10-CM diagnosis code for other specified type of carcinoma in situ of unspecified breast. Other types of pre-cancerous breast cell abnormalities that have not spread beyond the breast tissue, but the specific breast (left or right) is not documented. D05.80 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering in situ neoplasms (d00-d09).
D05.80 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.
Use this code only when the type of carcinoma in situ is specified but does not fit into lobular or intraductal categories.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for D05.80 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.