Malignant neoplasm of cerebral meninges

This code signifies the presence of a primary cancerous tumor originating from the membranes (meninges) that surround the brain. This malignant growth can affect the dura mater, arachnoid, or pia mater, potentially leading to neurological deficits due to compression or invasion of brain tissue.

Use this code when documentation clearly indicates a primary malignant neoplasm of the cerebral meninges, confirmed by pathology or imaging. This applies to cases where the tumor originates within the meningeal layers of the cerebrum, not as a metastasis from another site.

• Differentiate carefully between primary and secondary (metastatic) malignant neoplasms of the cerebral meninges; this code is for primary only.
• Ensure documentation specifies "cerebral" meninges, as other meningeal sites have different codes.
• Sequence this code as the primary diagnosis when the malignant neoplasm is the reason for the encounter.