ICD-10 Code D04.11 – Carcinoma in situ of skin of right eyelid, including canthus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D04.11 – Carcinoma in situ of skin of right eyelid, including canthus
What it is
D04.11 identifies a noninvasive skin cancer limited to the right eyelid or canthus. The abnormal cells have not penetrated deeper tissue, so you code a localized in situ lesion.
Clinical signs
Clinical features may include a persistent eyelid or canthal lesion with suspicious changes in color, texture, or shape. Diagnosis is usually confirmed by pathology; if details are incomplete, check documentation.
When to use this code
Use D04.11 when the provider documents carcinoma in situ specifically on the right eyelid, including the inner or outer canthus. It also fits biopsy-confirmed in situ disease that remains confined to the skin. If laterality or site is unclear, check documentation before coding.
Do not use for
Do not use this code for invasive eyelid cancer, benign eyelid lesions, or unspecified skin sites. If the record does not clearly state the right eyelid or canthus, do not assume this code.
Coding tip
Verify both laterality and the exact eyelid/canthus site in the pathology or provider note before assigning D04.11.