ICD-10 Code D03.2 – Melanoma in situ of ear and external auricular canal (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D03.2 – Melanoma in situ of ear and external auricular canal
What it is
D03.2 identifies melanoma in situ affecting the ear or external auricular canal. The lesion is confined to the epidermis and has not invaded deeper tissue.
Clinical signs
Clinical features vary; refer to documentation. You may see a suspicious pigmented lesion on the ear, with asymmetry, irregular borders, color variation, or change over time.
When to use this code
Use this code when the provider documents melanoma in situ on the ear or external auricular canal, including pathology-confirmed in situ disease. It is appropriate when the lesion is confined to the epidermis and no invasion is reported. Check documentation if the site is described ambiguously.
Do not use for
Do not use D03.2 for invasive melanoma, benign pigmented lesions, or unspecified skin lesions. If the record does not clearly state in situ disease, check documentation.
Coding tip
Confirm both the anatomic site and the in situ designation before assigning D03.2.