ICD-10 Code C43.7 – Malignant melanoma of lower limb, including hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C43.7 – Malignant melanoma of lower limb, including hip
What it is
C43.7 identifies a malignant melanoma arising on the lower limb, including the hip. Use it when documentation states a primary skin melanoma at that anatomic site.
Clinical signs
Clinical features vary; refer to documentation. Commonly, melanoma is described as a changing pigmented lesion, irregular in shape or color, with possible asymmetry, border irregularity, or reported bleeding.
When to use this code
Use C43.7 when the provider documents malignant melanoma on the leg, foot, ankle, or hip region and does not specify a more exact subsite. You should code the documented primary site, not the biopsy site, if they differ. Check documentation when laterality or depth is unclear.
Do not use for
Do not use this code for benign nevi, melanoma in situ, or metastatic melanoma without a primary lower-limb skin site. Check documentation if the lesion is on another skin location.
Coding tip
Match the code to the exact documented anatomic site and confirm whether the melanoma is primary, in situ, or metastatic.