Exostosis of bilateral orbits

This code signifies the presence of benign bony growths, known as exostoses, affecting both eye sockets. These growths can occur on any part of the orbital bones and may or may not cause symptoms depending on their size and location.

Apply this code when documentation explicitly states the diagnosis of exostosis affecting both orbits. Supporting documentation should include imaging reports (e.g., CT, MRI) confirming the bilateral presence of these bony lesions.

• Ensure documentation specifies "bilateral" involvement; otherwise, use a code for unilateral exostosis.
• Do not confuse with osteoma, which is a specific type of benign bone tumor, though exostosis can be a form of osteoma.
• Code any associated symptoms (e.g., proptosis, vision changes) separately as secondary diagnoses.