ICD-10 Code C47.8 – Malignant neoplasm of overlapping sites of peripheral nerves and autonomic nervous system (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C47.8 – Malignant neoplasm of overlapping sites of peripheral nerves and autonomic nervous system
What it is
This code identifies a malignant tumor arising in peripheral nerves or the autonomic nervous system when the lesion spans overlapping sites and cannot be assigned to one specific anatomic site.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a documented malignant nerve sheath or related tumor involving more than one adjacent site, with pathology or imaging supporting overlap.
When to use this code
Use C47.8 when the provider documents a malignant neoplasm of peripheral nerves or autonomic nervous system involving overlapping sites, and no single site is more specific. It is appropriate when the record clearly states “overlapping” or equivalent wording. Check documentation if the anatomic extent is unclear.
Do not use for
Do not use this code for benign nerve tumors, metastatic disease to nerves, or malignant neoplasms limited to one specific peripheral nerve site. If the documentation names a single site, code that site instead.
Coding tip
Confirm that “overlapping sites” is documented; otherwise, choose the most specific site code supported by the record.