ICD-10 Code C44.1021 – Unspecified malignant neoplasm of skin of right upper eyelid, including canthus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.1021 – Unspecified malignant neoplasm of skin of right upper eyelid, including canthus
What it is
This code identifies a malignant skin tumor on the right upper eyelid, including the canthus, when the exact histology is not specified. Use it for a confirmed cancer of the eyelid skin, not for benign or uncertain lesions.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include a persistent eyelid lesion, ulceration, crusting, bleeding, or a nonhealing area on the right upper lid or canthus.
When to use this code
Use this code when the record states a malignant neoplasm of the skin on the right upper eyelid, including the canthus, but does not identify a more specific skin cancer type. It also fits when the provider documents an unspecified malignant skin lesion in this exact location. Check documentation if the site is described only as eyelid without laterality or if pathology is more specific.
Do not use for
Do not use this code for benign eyelid lesions, premalignant changes, or cancers of the conjunctiva, lacrimal system, or deeper orbital structures. If the documentation names a specific histology, use the more specific code.
Coding tip
Verify both laterality and the exact eyelid location before assigning the code.