ICD-10 Code C44.1921 – Other specified malignant neoplasm of skin of right upper eyelid, including canthus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.1921 – Other specified 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, that is not otherwise specified by a more precise skin cancer code. Use it when the record clearly documents malignancy at this exact site.
Clinical signs
Clinical features vary; refer to documentation. Skin cancers of the eyelid may appear as a persistent lesion, ulcer, crusting, bleeding, or nonhealing area on the upper lid or canthus.
When to use this code
Use this code when the provider documents a malignant neoplasm of the skin on the right upper eyelid, including the canthus, and no more specific histology code is available. It fits primary site documentation, not laterality assumptions. Check documentation if the note only says “eyelid cancer” or does not specify the right upper eyelid.
Do not use for
Do not use it for benign eyelid lesions, uncertain behavior lesions, or cancers of a different eyelid location. If the record identifies a more specific skin cancer type, code that diagnosis instead.
Coding tip
Verify laterality and exact eyelid location in the pathology or provider note before assigning C44.1921.