ICD-10 Code C44.10 – Unspecified malignant neoplasm of skin of eyelid, including canthus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.10 – Unspecified malignant neoplasm of skin of eyelid, including canthus
What it is
C44.10 identifies a malignant skin tumor on the eyelid or canthus when the exact site or histology is not documented. Use it for a confirmed skin cancer of this area with unspecified details.
Clinical signs
Findings may include a persistent eyelid lesion, ulceration, crusting, bleeding, or a nonhealing nodule. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record states a malignant neoplasm of the eyelid skin but does not specify upper or lower lid, medial or lateral canthus, or a more precise diagnosis. It also fits when pathology confirms malignancy, yet the report remains nonspecific. Check documentation if the lesion is elsewhere on the eye or adnexa.
Do not use for
Do not use C44.10 for benign eyelid lesions, conjunctival tumors, or malignant neoplasms with a more specific eyelid site code. If the documentation identifies a different skin location, code that site instead.
Coding tip
Query for exact eyelid location and histology before defaulting to this unspecified code.