ICD-10 Code C76.50 – Malignant neoplasm of unspecified lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C76.50 – Malignant neoplasm of unspecified lower limb
What it is
C76.50 identifies a malignant neoplasm in an unspecified lower limb site when the exact anatomic origin is not documented. Use it when the record confirms cancer in the lower limb, but not a specific bone, soft tissue, or skin location.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a documented mass, swelling, pain, ulceration, or imaging evidence of malignancy in the lower limb, but the code itself depends on recorded site detail.
When to use this code
Use this code when the provider documents a malignant neoplasm involving the lower limb and does not specify whether it is in the thigh, leg, ankle, or foot. It is also appropriate when the chart states “lower limb” only. If laterality or exact site is available, code that more specific diagnosis instead.
Do not use for
Do not use it when the neoplasm is documented as a specific bone, skin, or soft tissue site in the lower limb. Do not use it for benign tumors, metastatic disease, or uncertain behavior unless the record supports those diagnoses.
Coding tip
Check pathology, operative notes, and imaging for a more precise lower-limb site before assigning this unspecified code.