ICD-10 Code C47.1 – Malignant neoplasm of peripheral nerves of upper limb, including shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C47.1 – Malignant neoplasm of peripheral nerves of upper limb, including shoulder
What it is
This code identifies a malignant tumor arising from the peripheral nerves in the upper limb, including the shoulder. Use it when the documentation specifies cancer in a peripheral nerve location rather than a skin, bone, or soft tissue site.
Clinical signs
Clinical features vary; refer to documentation. Commonly, records describe a mass, pain, numbness, weakness, or other nerve-related symptoms in the arm or shoulder, along with imaging or pathology confirming malignancy.
When to use this code
Use C47.1 when the provider documents a malignant neoplasm of a peripheral nerve in the upper extremity or shoulder. This includes primary site documentation for a nerve-origin cancer in that anatomic region. If the note only says “arm mass” or “soft tissue tumor,” check documentation before assigning this code.
Do not use for
Do not use this code for benign peripheral nerve tumors, unspecified arm cancers, or malignancies clearly arising from bone, skin, or muscle. If the site or histology is unclear, check documentation.
Coding tip
Confirm both the malignant nature and the exact nerve location before coding, and do not infer C47.1 from symptoms alone.