Malignant neoplasm of meninges, unspecified

This code signifies a cancerous tumor originating in the meninges, the protective membranes surrounding the brain and spinal cord. It indicates that the specific type or location within the meninges is not documented or is unknown.

Apply this code when documentation confirms a malignant meningeal neoplasm but lacks further specificity regarding its histological type (e.g., meningioma, sarcoma) or precise anatomical site within the meninges. This is often used in initial diagnostic phases or when pathology reports are inconclusive.

• Avoid using this code if a more specific histological type (e.g., C70.0 for cerebral meninges, C70.1 for spinal meninges) is documented.
• Always review pathology reports and imaging studies for greater specificity before assigning this unspecified code.
• Sequence this code as the primary diagnosis when it is the reason for the encounter, followed by any associated neurological symptoms or complications.