ICD-10 Code C44.1221 – Squamous cell carcinoma of skin of right upper eyelid, including canthus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.1221 – Squamous cell carcinoma of skin of right upper eyelid, including canthus
What it is
This code identifies a malignant squamous cell carcinoma arising from the skin of the right upper eyelid, including the inner or outer canthus. Use it when the lesion is documented as involving that specific eyelid site.
Clinical signs
Typical findings include a persistent eyelid lesion that may be scaly, crusted, ulcerated, or enlarging. Clinical features vary; refer to documentation, and confirm the right upper eyelid or canthus location.
When to use this code
Use C44.1221 when the provider documents squamous cell carcinoma of the skin on the right upper eyelid, including the canthus. It also fits pathology-confirmed or clinically diagnosed lesions at that exact site. If laterality or eyelid location is unclear, check documentation.
Do not use for
Do not use this code for basal cell carcinoma, melanoma, or nonmalignant eyelid lesions. Also avoid it when the record specifies a different eyelid, unspecified side, or a non-skin primary site.
Coding tip
Verify laterality and that the lesion is on the skin of the eyelid, not the conjunctiva or deeper eye structures.