ICD-10 Code D43.4 – Neoplasm of uncertain behavior of spinal cord (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D43.4 – Neoplasm of uncertain behavior of spinal cord
What it is
This code identifies a spinal cord tumor whose behavior is uncertain, meaning pathology or imaging does not clearly show benign or malignant behavior. Use it when the record specifically documents an uncertain neoplasm of the spinal cord.
Clinical signs
Clinical features vary; refer to documentation. Patients may have neurologic deficits related to spinal cord compression, such as weakness, sensory changes, pain, or gait disturbance, but the code itself depends on the documented diagnosis.
When to use this code
Use D43.4 when the provider documents a neoplasm of uncertain behavior involving the spinal cord and the final diagnosis is not yet classified as benign or malignant. It also fits confirmed pathology or imaging reports that specifically state uncertain behavior. If the site is different, or the record names a more specific tumor type, code that documentation instead.
Do not use for
Do not use this code for benign spinal cord tumors, malignant neoplasms, or metastatic disease. Check documentation if the lesion is in the spine, meninges, or nerve roots rather than the spinal cord.
Coding tip
Code from the provider’s final wording, and verify the exact anatomic site before assigning D43.4.