ICD-10 Code C44.129 – Squamous cell carcinoma of skin of left eyelid, including canthus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.129 – Squamous cell carcinoma of skin of left eyelid, including canthus
What it is
This code identifies a malignant squamous cell tumor arising from the skin of the left eyelid, including the inner or outer canthus. Use it when documentation specifies the left eyelid as the primary skin site.
Clinical signs
Typical findings include a persistent scaly, crusted, or ulcerated eyelid lesion that may bleed or enlarge over time. Clinical features vary; refer to documentation.
When to use this code
Use C44.129 when the provider documents squamous cell carcinoma of the skin on the left eyelid or canthus. It also fits pathology-confirmed malignancy at that exact site when laterality is clearly stated. If the record is unclear about the eyelid side or the lesion site, check documentation.
Do not use for
Do not use this code for non-melanoma skin lesions without malignant pathology, or for tumors on the right eyelid. If the diagnosis is not specifically squamous cell carcinoma of the left eyelid skin, check documentation.
Coding tip
Confirm laterality and the exact anatomic site in the pathology or operative note before assigning this code.