C44.1921 ICD-10-CM Code: Other specified malignant neoplasm of skin of right upper eyelid, including canthus
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FY 2026 Apr update / Neoplasms (C00-D49) / Melanoma and other malignant neoplasms of skin (C43-C44)
C44.1921
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOther specified malignant neoplasm of skin of right upper eyelid, including canthus
A malignant skin cancer of the upper eyelid of the right eye (not sebaceous cell carcinoma) that is a specified type other than the most common eyelid cancers.
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 C44.1921 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for C44.1921 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for C44.1921 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for C44.1921 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for C44.1921 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for C44.1921 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for C44.1921 in this effective period.
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 C44.1921 an HCC code?
No. C44.1921 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- C44.1921
- Description
- Other specified malignant neoplasm of skin of right upper 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
C44.1921 is the ICD-10-CM diagnosis code for other specified malignant neoplasm of skin of right upper eyelid, including canthus. A malignant skin cancer of the upper eyelid of the right eye (not sebaceous cell carcinoma) that is a specified type other than the most common eyelid cancers. C44.1921 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering melanoma and other malignant neoplasms of skin (c43-c44).
C44.1921 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.
This code is for specified malignant neoplasms other than sebaceous cell carcinoma - verify the histological type in pathology.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for C44.1921 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code is for specified malignant neoplasms other than sebaceous cell carcinoma - verify the histological type in pathology
- •Ensure right upper eyelid location is clearly documented to distinguish from other eyelid locations