Malignant neoplasm of mandible

This code signifies a primary cancerous tumor originating in the bone of the lower jaw. This malignancy involves the bony structure of the mandible itself, distinguishing it from cancers of the surrounding soft tissues.

Apply this code when documentation clearly indicates a primary malignant neoplasm of the mandibular bone. This is appropriate for cases such as osteosarcoma, chondrosarcoma, or other primary bone cancers affecting the mandible. Supporting documentation should include pathology reports confirming malignancy and the specific anatomical site.

• Differentiate carefully between primary bone malignancy and metastatic disease to the mandible; use secondary neoplasm codes for the latter.
• Review the "Excludes2" notes to avoid miscoding neoplasms of the soft tissues of the jaw or the upper jaw bone.
• Ensure the documentation specifies the bone of the mandible, not just "jaw," to accurately apply this code.