2026 ICD-10-CM Diagnosis Code C44.191Other specified malignant neoplasm of skin of unspecified eyelid, including canthus
ICD-10-CM Codes›C00–D49›C43-C44›C44
- Billable — Valid for Submission
- Chronic Condition
C44.191 is a billable ICD-10-CM diagnosis code for other specified malignant neoplasm 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 apocrine adenocarcinoma of skin. 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.
- Apocrine adenocarcinoma of skin
- Moll's gland adenocarcinoma
- Primary apocrine adenocarcinoma of skin
- Primary malignant neoplasm of sweat gland
- Primary Moll gland adenocarcinoma
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) › specified type NEC | C44.19 | – | – | – | – | – |
| eyelid (lower) (skin) (upper) › specified type NEC | C44.19 | – | – | – | – | – |
| lid (lower) (upper) › specified type NEC | C44.19 | – | – | – | – | – |
| meibomian gland › specified type NEC | C44.19 | – | – | – | – | – |
| palpebra › specified type NEC | C44.19 | – | – | – | – | – |
| skin NOS › canthus (eye) (inner) (outer) › specified type NEC | C44.19 | – | – | – | – | – |
| skin NOS › eyelid › specified type NEC | C44.19 | – | – | – | – | – |
| skin NOS › lid (lower) (upper) › specified type NEC | C44.19 | – | – | – | – | – |
| skin NOS › palpebra › specified type NEC | C44.19 | – | – | – | – | – |
Patient EducationClinical
Eyelid Disorders
Your eyelids help protect your eyes. When you blink, your eyelids spread moisture over your eyes. Blinking also helps move dirt or other particles off the surface of the eye. You close your eyelids when you see something coming toward your eyes. This can help protect against injuries.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert C44.191 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About C44.191Overview
Is C44.191 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified malignant neoplasm of skin of unspecified eyelid, including canthus on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does C44.191 group to?
When other specified malignant neoplasm 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 C44.191?
Under the General Equivalence Mappings, other specified malignant neoplasm of skin of unspecified eyelid, including canthus converts to ICD-9-CM 173.19 (mal neo eyelid/canth NEC). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
