ICD-10 Code C44.101 – Unspecified malignant neoplasm of skin of unspecified eyelid, including canthus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.101 – Unspecified malignant neoplasm of skin of unspecified eyelid, including canthus
What it is
This code identifies a malignant skin tumor on the eyelid or canthus when the exact eyelid site is not specified. Use it when documentation confirms cancer of the skin in this area but does not name upper, lower, or specific side.
Clinical signs
Clinical features vary; refer to documentation. Eyelid skin cancers may appear as a persistent nodule, ulcer, crusted lesion, or nonhealing area on the lid margin or canthus.
When to use this code
Use this code when the provider documents a malignant neoplasm of eyelid skin and does not specify which eyelid or canthus is involved. It also fits cases where the lesion is described only as an unspecified eyelid skin cancer. If laterality or exact eyelid is documented, code more specifically.
Do not use for
Do not use this code for benign eyelid lesions, premalignant skin changes, or malignant tumors of the conjunctiva or other non-skin eyelid structures. Check documentation if the site is not clearly the skin of the eyelid.
Coding tip
Query for laterality and exact eyelid location before defaulting to this unspecified code.