Secondary malignant neoplasm of other respiratory organs

This code signifies the presence of a malignant tumor that has spread to respiratory organs other than the lung, bronchus, or pleura from a primary cancer site elsewhere in the body. This includes metastatic cancer affecting the trachea, larynx, nasopharynx, or other specified respiratory structures.

Apply this code when documentation clearly indicates a secondary (metastatic) malignancy affecting respiratory organs such as the trachea, larynx, or nasopharynx. This code is appropriate when the primary site of the cancer is known and has metastasized to these specific respiratory locations.

• Always sequence the primary malignancy code first, followed by this code for the secondary site.
• Distinguish carefully between primary respiratory malignancies and secondary metastases; this code is exclusively for secondary sites.
• Ensure documentation specifies "secondary" or "metastatic" involvement of a respiratory organ other than lung/bronchus/pleura.