Malignant neoplasm of brain, unspecified

This code signifies a primary cancerous tumor originating within the brain tissue, where the specific anatomical location or type of malignancy is not documented. It indicates an unclassified or unspecified malignant neoplasm of the brain.

Use this code when the medical record clearly states a diagnosis of brain cancer, but lacks further detail regarding the specific lobe, region, or histological type. This is often an interim diagnosis or used when pathology results are pending or unavailable. Documentation must explicitly state "malignant neoplasm of brain, unspecified" or similar.

• Avoid using this code if more specific documentation is available; always query for greater detail regarding the tumor's location or histology.
• Do not use for secondary (metastatic) brain tumors; refer to codes in the C79.31 or C79.32 range.
• Sequence as the primary diagnosis when the brain malignancy is the reason for the encounter, unless treatment is directed at a complication or metastasis.