ICD-10 Code D03.111 – Melanoma in situ of right upper eyelid, including canthus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D03.111 – Melanoma in situ of right upper eyelid, including canthus
What it is
D03.111 identifies melanoma in situ on the right upper eyelid, including the canthus. It means malignant melanocytic cells are confined to the epidermis and have not invaded deeper tissue.
Clinical signs
Clinical features vary; refer to documentation. You may see a changing pigmented lesion, irregular borders, color variation, or a lesion suspicious on ophthalmic or dermatologic examination.
When to use this code
Use this code when the provider documents melanoma in situ specifically on the right upper eyelid or its canthus. It applies when pathology or clinical assessment confirms an in situ lesion, not invasive melanoma.
If the record only says “eyelid melanoma” without laterality or depth, check documentation before coding. Confirm the site is the right upper eyelid, including canthus, and not another eyelid location.
Do not use for
Do not use D03.111 for invasive melanoma, unspecified eyelid sites, or lesions on the left eyelid. Also avoid it if documentation supports a different skin cancer diagnosis.
Coding tip
Verify both laterality and anatomic site in the pathology or operative note before assigning D03.111.