D04.10 ICD-10-CM Code: Carcinoma in situ of skin of unspecified eyelid, including canthus
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Neoplasms (C00-D49) / In situ neoplasms (D00-D09)
D04.10
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceCarcinoma in situ of skin of unspecified eyelid, including canthus
This code describes an early-stage skin cancer (carcinoma in situ) on the eyelid or corner of the eye that has not yet invaded deeper layers of skin. It is a precancerous condition that requires monitoring and treatment to prevent progression to invasive cancer.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for D04.10 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for D04.10 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for D04.10 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for D04.10 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for D04.10 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for D04.10 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for D04.10 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 D04.10 an HCC code?
No. D04.10 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- D04.10
- Description
- Carcinoma in situ of skin of unspecified eyelid, including canthus
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- 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
D04.10 is the ICD-10-CM diagnosis code for carcinoma in situ of skin of unspecified eyelid, including canthus. This code describes an early-stage skin cancer (carcinoma in situ) on the eyelid or corner of the eye that has not yet invaded deeper layers of skin. It is a precancerous condition that requires monitoring and treatment to prevent progression to invasive cancer. D04.10 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering in situ neoplasms (d00-d09).
D04.10 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 pathology report explicitly states 'carcinoma in situ' - do not use for invasive melanoma or other invasive skin cancers.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for D04.10 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code only when the pathology report explicitly states 'carcinoma in situ' - do not use for invasive melanoma or other invasive skin cancers
- •The code specifies 'unspecified eyelid' - if documentation clearly identifies right or left eyelid, consider using more specific laterality codes (D04.11 for right, D04.12 for left) if available in your coding system