ICD-10 Code D03.6 – Melanoma in situ of upper limb, including shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D03.6 – Melanoma in situ of upper limb, including shoulder
What it is
D03.6 identifies melanoma in situ located on the upper limb, including the shoulder. The lesion is confined to the epidermis and has not invaded deeper tissue.
Clinical signs
Clinical features vary; refer to documentation. Typical descriptions include a changing pigmented lesion, irregular border, color variation, or a biopsy showing melanoma limited to the epidermis.
When to use this code
Use D03.6 when the provider documents melanoma in situ on the arm, forearm, hand, or shoulder area. The pathology report or clinical note should clearly state “in situ” or an equivalent noninvasive diagnosis. If the site is not specified, check documentation before coding.
Do not use for
Do not use this code for invasive melanoma, which requires a different category. Also avoid it when the lesion is on another body site or when the record only says “suspicious for melanoma.”
Coding tip
Confirm both the anatomic site and the in situ wording in the pathology or provider note before assigning D03.6.