Major osseous defect, other site

This code signifies a significant structural loss of bone tissue in an anatomical location not specifically categorized elsewhere. It indicates a substantial discontinuity or absence of bone, often resulting from trauma, infection, tumor resection, or congenital anomaly, requiring reconstructive intervention.

Apply this code when documentation clearly describes a large bone defect in a site such as the sternum, ribs, or scapula, that is not classifiable to a more specific defect code. Supporting documentation should detail the size, location, and etiology of the osseous defect, confirming its major nature and the "other site" designation.

• Ensure the documentation specifies "major" and an "other site" to avoid miscoding to minor defects or site-specific codes.
• Always sequence this code after the underlying cause of the defect (e.g., fracture, osteomyelitis, neoplasm) if known and still active.
• Do not use this code for defects of the long bones, skull, spine, or pelvis, as more specific codes exist for those locations.