Neoplasm of uncertain behavior of meninges, unspecified

This code signifies a tumor originating in the meninges (the membranes surrounding the brain and spinal cord) that cannot be definitively classified as benign or malignant based on current diagnostic information. The behavior of the neoplasm is undetermined, meaning its potential for local invasion or metastasis is unknown.

Apply this code when pathology reports or clinical documentation describe a meningeal neoplasm where the pathologist is unable to determine whether it is benign or malignant. This often occurs when biopsy results are inconclusive, or further diagnostic workup is pending.

• Do not use this code if the meningeal neoplasm is definitively diagnosed as benign (e.g., meningioma) or malignant.
• Always seek clarification from the provider if the documentation suggests a more specific diagnosis is available but not explicitly stated.
• Sequence this code as the primary diagnosis when the neoplasm of uncertain behavior is the reason for the encounter.