Atrophy of bilateral orbit

This code describes a degenerative process affecting the orbital tissues on both sides of the face, leading to a reduction in their size and volume. This atrophy can involve fat, muscle, and connective tissue within the eye socket, potentially causing enophthalmos (sunken eyes) or other structural changes.

Use this code when documentation explicitly states bilateral orbital atrophy, often observed in conditions such as severe dehydration, cachexia, chronic debilitating diseases, or post-radiation therapy. Supporting documentation should clearly indicate the bilateral nature of the atrophy and its clinical presentation.

• Ensure the documentation specifies "bilateral" involvement; otherwise, use a code for unilateral atrophy or unspecified laterality.
• Distinguish from anophthalmos (absence of the eye) or microphthalmos (abnormally small eye), which are distinct conditions.
• Code any underlying systemic condition causing the atrophy as a primary diagnosis, with orbital atrophy as a secondary diagnosis.