ICD-10 Code D03.52 – Melanoma in situ of breast (skin) (soft tissue) (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D03.52 – Melanoma in situ of breast (skin) (soft tissue)
What it is
D03.52 identifies melanoma in situ located on the breast skin or soft tissue. “In situ” means the abnormal melanocytes are confined to the epidermis and have not invaded deeper tissue.
Clinical signs
Typical findings include a suspicious pigmented lesion with irregular color, border, or shape. Clinical features vary; refer to documentation and pathology confirming melanoma in situ at the breast site.
When to use this code
Use this code when the record clearly states melanoma in situ of the breast skin or soft tissue. It applies when the lesion is confined to the local site and the diagnosis is supported by pathology or provider documentation.
If the note only says “melanoma” without stating in situ, or the site is different, do not assume D03.52. Check documentation for exact anatomic location and whether invasion is present.
Do not use for
Do not use this code for invasive melanoma, uncertain behavior lesions, or benign pigmented skin lesions. Check documentation if the record does not specify in situ disease or the breast site.
Coding tip
Assign D03.52 only when both the in situ status and the breast location are documented clearly.