Malignant neoplasm of lingual tonsil

This code signifies a cancerous tumor originating in the lingual tonsil, which is lymphoid tissue located at the base of the tongue. It represents a primary malignancy affecting this specific anatomical site within the oral cavity/oropharynx.

Apply this code when documentation clearly indicates a confirmed diagnosis of malignant neoplasm of the lingual tonsil. This typically includes pathology reports confirming malignancy and specifying the lingual tonsil as the primary site. It is appropriate for initial diagnosis, treatment, and follow-up care of this specific cancer.

• Ensure the documentation specifies "lingual tonsil" and not other tonsillar sites (e.g., palatine tonsil).
• Always sequence this code as the primary diagnosis when it is the reason for the encounter.
• Review pathology reports carefully to confirm the primary site and malignancy.