ICD-10 Code D03.11 – Melanoma in situ of right eyelid, including canthus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D03.11 – Melanoma in situ of right eyelid, including canthus
What it is
This code identifies melanoma in situ on the right eyelid or canthus. The lesion is confined to the epidermis and has not invaded deeper tissue.
Clinical signs
Expect a suspicious pigmented or changing lesion on the right eyelid margin or canthus. Clinical features vary; refer to documentation for asymmetry, irregular borders, color variation, or biopsy confirmation.
When to use this code
Use D03.11 when the provider documents melanoma in situ specifically on the right eyelid, including the canthal area. Apply it after pathology or specialist assessment confirms an in situ melanoma. If the note only says “eyelid lesion” or laterality is unclear, check documentation.
Do not use for
Do not use this code for invasive melanoma, uncertain behavior lesions, or benign eyelid growths. It is also wrong when the lesion is on the left eyelid or another skin site.
Coding tip
Verify both laterality and the “in situ” wording before assigning D03.11.