Neoplasm of uncertain behavior of other respiratory organs

This code represents a tumor of the respiratory system, excluding the lung, bronchus, and pleura, where the biological behavior (benign vs. malignant) cannot yet be definitively determined. This includes neoplasms of the trachea, larynx, nasopharynx, oropharynx, and other specified respiratory sites that are still under investigation.

Use this code when pathology reports indicate a neoplasm of a respiratory organ (other than lung, bronchus, or pleura) with an uncertain or unknown behavior. This is appropriate when the clinician suspects a tumor but further diagnostic workup is needed to classify it as benign or malignant, or when the pathologist explicitly states "uncertain behavior."

• Ensure the documentation specifies a respiratory organ other than lung, bronchus, or pleura.
• Review pathology reports carefully for terms like "uncertain behavior," "borderline malignancy," or "indeterminate."
• Do not use for neoplasms of the ear or nose (NOS or skin), as these have specific Excludes1 codes.