ICD-10 Code C47.20 – Malignant neoplasm of peripheral nerves of unspecified lower limb, including hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C47.20 – Malignant neoplasm of peripheral nerves of unspecified lower limb, including hip
What it is
This code identifies a malignant tumor arising from the peripheral nerves in an unspecified lower limb, including the hip. Use it when the record confirms nerve-origin cancer in that region but does not specify a more exact site.
Clinical signs
Clinical features vary; refer to documentation. Patients may have a growing mass, pain, numbness, weakness, or other nerve-related symptoms in the lower limb or hip area, but the diagnosis must be confirmed in the chart.
When to use this code
Use C47.20 when the provider documents a malignant neoplasm of peripheral nerves affecting the lower limb or hip and the laterality or exact nerve site is not specified. It also fits when the tumor is described broadly without a more specific code option. Check documentation if the note names a more precise nerve, site, or laterality.
Do not use for
Do not use this code for benign peripheral nerve tumors, soft tissue cancers not clearly arising from nerves, or metastatic disease to a nerve. If the record supports a different anatomic site or laterality, code that instead.
Coding tip
Query for the exact nerve, laterality, and primary site whenever the documentation is vague.