ICD-10 Code D04.70 – Carcinoma in situ of skin of unspecified lower limb, including hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D04.70 – Carcinoma in situ of skin of unspecified lower limb, including hip
What it is
D04.70 identifies carcinoma in situ of the skin on an unspecified lower limb, including the hip. It means abnormal cells 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 skin lesion, biopsy-confirmed in situ malignancy, or a localized noninvasive lesion on the lower limb or hip.
When to use this code
Use this code when the provider documents carcinoma in situ of skin on a lower limb or hip, but does not specify laterality. It is appropriate after pathology or clinical diagnosis confirms the lesion is in situ. You should code the documented site exactly as recorded.
Do not use for
Do not use this code for invasive skin cancer, benign lesions, or malignant melanoma. If the site is specified as right or left lower limb, choose the more specific code instead.
Coding tip
Check the pathology and procedure note for laterality and exact site before assigning D04.70.