C44.1221 ICD-10-CM Code: Squamous cell carcinoma of skin of right upper eyelid, including canthus
HCC Buddy Code Card
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FY 2026 Apr update / Neoplasms (C00-D49) / Melanoma and other malignant neoplasms of skin (C43-C44)
C44.1221
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceSquamous cell carcinoma of skin of right upper eyelid, including canthus
A type of skin cancer (squamous cell carcinoma) that develops on the right upper eyelid or the corner of the right eye.
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 C44.1221 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for C44.1221 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for C44.1221 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for C44.1221 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for C44.1221 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for C44.1221 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for C44.1221 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 C44.1221 an HCC code?
No. C44.1221 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- C44.1221
- Description
- Squamous cell carcinoma 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
C44.1221 is the ICD-10-CM diagnosis code for squamous cell carcinoma of skin of right upper eyelid, including canthus. A type of skin cancer (squamous cell carcinoma) that develops on the right upper eyelid or the corner of the right eye. C44.1221 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering melanoma and other malignant neoplasms of skin (c43-c44).
C44.1221 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.
Confirm the pathology report documents squamous cell carcinoma histology.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for C44.1221 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Confirm the pathology report documents squamous cell carcinoma histology
- •Verify documentation specifies right side and upper eyelid location for accurate coding