D04.121
✓ Billable
Carcinoma in situ of skin of left upper eyelid, including canthus
ICD-10-CM · FY2026 · Neoplasms
Code
D04.121
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Neoplasms
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code D04.121?
ICD-10-CM code D04.121 represents Carcinoma in situ of skin of left upper eyelid, including canthus. It is a billable diagnosis code in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is D04.121 billable?
Yes. D04.121 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is D04.121 in?
D04.121 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.
Related codes in the D04 category
D04
Carcinoma in situ of skin
Non-billable
D04.0
Carcinoma in situ of skin of lip
Billable
D04.1
Carcinoma in situ of skin of eyelid, including canthus
Non-billable
D04.2
Carcinoma in situ of skin of ear and external auricular canal
Non-billable
D04.3
Carcinoma in situ of skin of other and unspecified parts of face
Non-billable
D04.4
Carcinoma in situ of skin of scalp and neck
Billable
D04.5
Carcinoma in situ of skin of trunk
Billable
D04.6
Carcinoma in situ of skin of upper limb, including shoulder
Non-billable
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