Enlargement of bilateral orbits

This code signifies an abnormal increase in the size of the bony sockets that house the eyeballs, affecting both the left and right orbits. This enlargement can be due to various underlying conditions, leading to potential displacement of the globe (proptosis) and other ocular symptoms.

Apply this code when documentation explicitly states bilateral orbital enlargement or expansion. This is often seen in conditions like thyroid eye disease, orbital tumors, or inflammatory pseudotumors affecting both orbits. Supporting documentation should include imaging reports (CT, MRI) confirming the bilateral enlargement.

• Ensure documentation specifies "bilateral" involvement; otherwise, use the appropriate unilateral code.
• Distinguish from proptosis (exophthalmos) which describes the anterior displacement of the globe, not necessarily the enlargement of the bony orbit itself.
• Always code the underlying cause of the orbital enlargement first, if known and documented.