ICD-10 Code C44.1 – Other and unspecified malignant neoplasm of skin of eyelid, including canthus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.1 – Other and unspecified malignant neoplasm of skin of eyelid, including canthus
What it is
C44.1 identifies a malignant skin tumor on the eyelid or canthus when the record does not specify a more exact skin cancer type. Use it for primary skin malignancies in this location. Check documentation.
Clinical signs
Clinical features vary; refer to documentation. Commonly, notes describe a suspicious eyelid lesion, such as a nonhealing, enlarging, ulcerated, or irregular skin growth, with pathology confirming malignancy.
When to use this code
Use C44.1 when the provider documents a malignant neoplasm of eyelid skin or canthus and does not name a more specific site or histology. It also fits “other” or “unspecified” skin cancer of this area. Confirm whether the lesion is primary, not a metastasis.
Do not use for
Do not use this code for benign eyelid lesions, premalignant changes, or cancers arising from the conjunctiva or other non-skin eyelid structures. If the diagnosis is metastatic or better specified, choose the appropriate code instead.
Coding tip
Always verify whether the documentation says eyelid skin, canthus, or another eyelid structure, because site wording can change code selection.