Exostosis of left orbit

This code signifies the presence of a benign bony outgrowth or spur originating from the left orbital bone. This exostosis is a non-cancerous lesion that can arise from various etiologies, potentially impacting orbital function or aesthetics.

Apply this code when documentation clearly indicates an exostosis affecting the left orbit. This diagnosis is typically made through imaging studies such as CT or MRI, or direct visualization during surgical exploration. The physician's notes should explicitly state the presence and laterality of the exostosis.

• Ensure documentation specifies "left orbit" to avoid laterality errors.
• Distinguish from other orbital lesions or tumors; this code is specific to bony exostosis.
• Consider additional codes for any associated symptoms (e.g., proptosis, diplopia) or complications.