Hypertrophy of bone, multiple sites

This code signifies an abnormal enlargement or overgrowth of bone tissue affecting multiple distinct anatomical locations. It indicates a generalized bony hypertrophy rather than a localized lesion.

Apply this code when documentation specifies hypertrophy of bone occurring in more than one site, such as hypertrophy of the skull and long bones. Supporting documentation should clearly identify the affected bones and confirm the hypertrophic nature of the changes.

• Do not use this code for localized bone hypertrophy; instead, select a more specific code for the affected anatomical site.
• Ensure the documentation explicitly states "multiple sites" or lists several distinct hypertrophied bones to justify its use.
• Consider sequencing this code after any underlying systemic condition causing the generalized bone hypertrophy, if known.