Deformity of left orbit due to bone disease

This code signifies an abnormal shape or structural defect of the bony socket surrounding the left eye, specifically caused by an underlying disease affecting the bone itself. This deformity can impact ocular function, vision, and facial aesthetics.

Apply this code when documentation clearly indicates a structural abnormality of the left orbit resulting from a bone pathology, such as fibrous dysplasia, Paget's disease, or osteomyelitis. Ensure the medical record specifies the laterality and the etiology as bone disease.

• Differentiate from orbital deformities due to trauma (e.g., fracture malunion) or congenital anomalies.
• Always code the underlying bone disease first, if known and active, as the primary diagnosis.
• Verify laterality; this code is specific to the left orbit.