Malignant neoplasm of ribs, sternum and clavicle

This diagnosis code signifies a primary cancerous tumor originating in the bones of the thoracic cage (ribs, sternum) or the collarbone (clavicle). These are malignant bone tumors, distinct from metastatic lesions that have spread from other primary sites.

Apply this code when documentation confirms a primary malignant neoplasm of the ribs, sternum, or clavicle. This is typically supported by pathology reports confirming malignancy and imaging studies identifying the tumor's location. Do not use for secondary (metastatic) bone cancer.

• Always confirm the primary nature of the tumor; if metastatic, a secondary bone cancer code (e.g., C79.51, C79.52) should be used in conjunction with the primary site.
• Specificity is key: if the documentation specifies a particular rib, sternum, or clavicle, this code is appropriate as there are no more granular codes for these specific bones.
• Sequence this code as the primary diagnosis when the malignant neoplasm of the ribs, sternum, or clavicle is the reason for the encounter.