ICD-10 Code C76.5 – Malignant neoplasm of lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C76.5 – Malignant neoplasm of lower limb
What it is
C76.5 identifies a malignant neoplasm in the lower limb when the exact primary site is not more specifically documented. Use it for cancer involving the leg or related lower-limb soft tissues when the record supports a malignant tumor but lacks a more precise location.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include a mass, swelling, pain, or functional limitation in the lower limb, but the diagnosis should be based on the documented malignant neoplasm and site.
When to use this code
Use C76.5 when the provider documents a malignant neoplasm of the lower limb and does not specify a more exact anatomic site. It may also fit when pathology or imaging confirms malignancy, but the chart only identifies the lower limb broadly. If the primary site is known, code that more specific location instead.
Do not use for
Do not use this code for benign tumors, metastatic disease without a documented primary lower-limb site, or cancers with a more specific site code. Check documentation if the lesion is described only as uncertain, suspected, or secondary.
Coding tip
Query for laterality and exact anatomic site whenever the documentation is vague, because a more specific code may be available.