Neoplasm of unspecified behavior of brain

This code represents a tumor or abnormal growth within the brain tissue itself, where the pathologist has not yet determined if it is benign, malignant, or uncertain. It signifies a brain neoplasm whose biological behavior (e.g., cancerous or non-cancerous) is currently unknown or unstated in the medical record.

Apply this code when documentation clearly indicates a brain mass or lesion, but the pathology report is pending, inconclusive, or not yet available to classify its behavior. This is often used for initial encounters or when a biopsy has been performed but results are not finalized.

• Do not use this code if the behavior of the brain neoplasm is known (e.g., benign, malignant, or uncertain behavior).
• Review the Excludes1 notes carefully to avoid co-coding with neoplasms of the cerebral meninges or cranial nerves.
• Always strive for a more specific code once pathology results are available, updating to benign, malignant, or uncertain behavior as appropriate.