Malignant neoplasm of subglottis

This code identifies a cancerous tumor originating in the subglottic region of the larynx, the area immediately below the vocal cords and extending to the lower border of the cricoid cartilage. This malignancy can obstruct the airway and affect vocal function.

Apply this code for documented primary malignant neoplasms specifically located within the subglottis. Documentation should clearly state the anatomical site as subglottic, often confirmed by biopsy and imaging studies.

• Differentiate from malignant neoplasms of other laryngeal sites (e.g., glottis, supraglottis) which have distinct codes.
• Ensure the pathology report confirms malignancy and the subglottic origin.
• Do not use for secondary or metastatic tumors to the subglottis; use codes for secondary malignancy and the primary site.