Major osseous defect, multiple sites

This code signifies a significant loss of bone tissue affecting multiple distinct anatomical locations within the skeletal system. It describes extensive bone defects that are not limited to a single site and may compromise structural integrity or function.

Apply this code when documentation clearly indicates large or extensive bone defects present in more than one bone or region. This is typically supported by imaging reports (X-ray, CT, MRI) and operative notes detailing the size and location of the osseous deficiencies across multiple sites.

• Ensure documentation specifies "multiple sites" for the osseous defect; otherwise, a site-specific code may be more appropriate.
• Do not use this code for minor bone irregularities or single-site defects.
• Consider sequencing this code after the underlying cause of the osseous defect (e.g., trauma, infection, tumor resection) if applicable.