2026 ICD-10-CM Diagnosis Code D04.10Carcinoma in situ of skin of unspecified eyelid, including canthus
ICD-10-CM Codes›C00–D49›D00-D09›D04
- Billable — Valid for Submission
- Not Chronic
D04.10 is a billable ICD-10-CM diagnosis code for carcinoma in situ of skin of unspecified eyelid, including canthus. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. Coders also document this condition as carcinoma in situ of skin of eyelid. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Skin cancers - all other types.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Carcinoma in situ of skin of eyelid
- Carcinoma in situ of skin of eyelid including canthus
- Carcinoma in situ of skin of lower eyelid
- Carcinoma in situ of skin of upper eyelid
- Squamous cell carcinoma in situ of eyelid
- Squamous cell carcinoma in situ of skin of face
- Squamous cell carcinoma in situ of skin of upper eyelid
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
| Site | Malig. Primary | Malig. Secondary | Ca in situ | Benign | Uncertain | Unspec. |
|---|---|---|---|---|---|---|
| canthus (eye) (inner) (outer) | C44.10 | C79.2 | D04.1 | D23.1 | D48.5 | D49.2 |
| lid (lower) (upper) | C44.10 | C79.2 | D04.1 | D23.1 | D48.5 | D49.2 |
| meibomian gland | C44.10 | C79.2 | D04.1 | D23.1 | D48.5 | D49.2 |
| palpebra | C44.10 | C79.2 | D04.1 | D23.1 | D48.5 | D49.2 |
| skin NOS › canthus (eye) (inner) (outer) | C44.10 | C79.2 | D04.1 | D23.1 | D48.5 | D49.2 |
| skin NOS › eyelid | C44.10 | C79.2 | D04.1 | D23.1 | D48.5 | D49.2 |
| skin NOS › lid (lower) (upper) | C44.10 | C79.2 | D04.1 | D23.1 | D48.5 | D49.2 |
| skin NOS › palpebra | C44.10 | C79.2 | D04.1 | D23.1 | D48.5 | D49.2 |
Patient EducationClinical
Skin Cancer
Skin cancer is the most common form of cancer in the United States. The two most common types are basal cell cancer and squamous cell cancer. They usually form on the head, face, neck, hands, and arms. Another type of skin cancer, melanoma, is more dangerous but less common.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert D04.10 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About D04.10Overview
Is D04.10 (Carcinoma in situ of skin of eyelid, including canthus) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report carcinoma in situ of skin of unspecified eyelid, including canthus on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does D04.10 group to?
When carcinoma in situ of skin of unspecified eyelid, including canthus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of D04.10?
Under the General Equivalence Mappings, carcinoma in situ of skin of unspecified eyelid, including canthus converts to ICD-9-CM 232.1 (ca in situ eyelid). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
