Neoplasm of uncertain behavior of other and unspecified parts of nervous system

This code signifies a tumor within the nervous system whose biological behavior (benign or malignant) cannot be definitively determined from the pathology or clinical presentation. It applies to neoplasms originating from various nervous system components, excluding those of the brain, spinal cord, and cranial nerves, which have more specific classifications.

Use this code when pathology reports indicate a neoplasm of the nervous system with ambiguous features, such as atypical cells but lacking clear malignancy. It is appropriate for tumors of peripheral nerves, autonomic nervous system, or other unspecified nervous tissues where the definitive nature is still pending or indeterminate. Documentation must clearly state "uncertain behavior" or "indeterminate" for a nervous system neoplasm.

• Do not use this code if the pathology definitively states benign or malignant; use the appropriate benign or malignant neoplasm code.
• Avoid using this code for neoplasms of the brain, spinal cord, or cranial nerves, as more specific codes exist for those locations.
• Always seek clarification from the physician or pathologist if the documentation is unclear regarding the tumor's behavior.