ICD-10 Code D04.111 – Carcinoma in situ of skin of right upper eyelid, including canthus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D04.111 – Carcinoma in situ of skin of right upper eyelid, including canthus
What it is
This code identifies a noninvasive skin cancer confined to the right upper eyelid, including the canthus. The lesion has not invaded deeper tissues, so you should code it as in situ disease.
Clinical signs
Clinical features vary; refer to documentation. Typical descriptions may include a localized eyelid lesion, plaque, or patch with pathology confirming carcinoma in situ.
When to use this code
Use D04.111 when the provider documents carcinoma in situ of the skin on the right upper eyelid or explicitly includes the canthus. This is appropriate when pathology or specialist assessment confirms a noninvasive malignant lesion. If the site is documented as right lower eyelid, left eyelid, or unspecified eyelid, choose the matching code instead.
Do not use for
Do not use this code for invasive eyelid cancer, benign skin lesions, or lesions on a different eyelid location. Check documentation if the record only states “skin cancer” without specifying in situ disease.
Coding tip
Verify both laterality and eyelid location, because the canthus is included only when documented with the right upper eyelid site.