ICD-10 Code D03.7 – Melanoma in situ of lower limb, including hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D03.7 – Melanoma in situ of lower limb, including hip
What it is
D03.7 identifies melanoma in situ located on the lower limb, including the hip. It means malignant melanocytic cells are confined to the epidermis and have not invaded deeper tissue.
Clinical signs
Clinical features vary; refer to documentation. Commonly, the lesion is an atypical pigmented patch or plaque with irregular borders, color variation, or change over time, confirmed by pathology as in situ disease.
When to use this code
Use this code when the provider documents melanoma in situ on the leg, ankle, foot, or hip region. It also fits pathology-confirmed noninvasive melanoma at a lower-limb site. If the record only says “melanoma” without depth or location, check documentation.
Do not use for
Do not use D03.7 for invasive melanoma, uncertain behavior skin lesions, or lesions on other body sites. If the pathology report shows invasion beyond the epidermis, choose a different melanoma code.
Coding tip
Verify both the anatomic site and the “in situ” wording in the pathology or provider note before assigning D03.7.