ICD-10 Code D03.70 – Melanoma in situ of unspecified lower limb, including hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D03.70 – Melanoma in situ of unspecified lower limb, including hip
What it is
This code identifies melanoma in situ located on an unspecified lower limb, including the hip. The abnormal melanocytes are confined to the epidermis and have not invaded deeper tissue.
Clinical signs
Clinical features vary; refer to documentation. Typical notes may describe a suspicious pigmented lesion with irregular shape, color variation, or change over time, confirmed as in situ by pathology.
When to use this code
Use this code when the provider documents melanoma in situ on a lower limb or hip without specifying the exact site. It also fits pathology-confirmed in situ disease when laterality or a more exact subsite is not recorded. If the lesion is invasive, use a different code.
Do not use for
Do not use this code for invasive melanoma, benign nevi, or other skin cancers. Check documentation if the site is specified more precisely or if the record does not clearly state melanoma in situ.
Coding tip
Verify the pathology and anatomic site wording before assigning D03.70.