Malignant neoplasm of bones of skull and face, except mandible

This code signifies a cancerous tumor originating in the bony structures of the skull or face, excluding the lower jawbone (mandible). It represents primary malignant bone neoplasms affecting areas such as the frontal bone, temporal bone, maxilla, or zygoma.

Use this code when documentation confirms a primary malignant neoplasm of a skull or facial bone, explicitly stating that the mandible is not involved. This applies to diagnoses such as osteosarcoma, chondrosarcoma, or Ewing's sarcoma affecting these specific skeletal sites. Supporting documentation must clearly identify the primary nature and location of the malignancy.

• Differentiate from secondary (metastatic) bone cancer; this code is for primary malignancy.
• Ensure the documentation explicitly excludes the mandible; if the mandible is involved, a different code is required.
• Review pathology reports and imaging studies for definitive primary site identification and confirmation of malignancy.