ICD-10 Code D03.4 – Melanoma in situ of scalp and neck (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D03.4 – Melanoma in situ of scalp and neck
What it is
D03.4 identifies melanoma in situ located on the scalp or neck. 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 with irregular shape, uneven color, or change over time, but the diagnosis depends on pathology confirming in situ disease.
When to use this code
Use D03.4 when the provider documents melanoma in situ specifically on the scalp or neck. This applies when pathology or final assessment confirms no invasion beyond the epidermis. If the site is described differently or invasion is present, Check documentation.
Do not use for
Do not use this code for invasive melanoma, uncertain lesions, or melanoma in situ at another anatomic site. If the record does not clearly state scalp or neck, Check documentation.
Coding tip
Match the anatomic site and the “in situ” wording exactly before assigning D03.4.