Closed fracture of orbital floor (blow-out)

This code signifies a fracture of the thin bone forming the floor of the eye socket, often resulting from blunt force trauma to the eye. It is commonly referred to as a "blow-out" fracture because the increased intraorbital pressure from the impact causes the orbital contents to herniate into the maxillary sinus.

Apply this code when documentation explicitly states a closed fracture of the orbital floor, particularly when the mechanism of injury suggests a blow-out fracture. Supporting documentation includes imaging reports (CT scans are definitive) confirming the fracture and physician notes detailing the closed nature of the injury.

• Differentiate from open fractures of the orbital floor, which would require a different code.
• Ensure the documentation specifies "closed" to avoid miscoding.
• Look for associated injuries, such as extraocular muscle entrapment or globe rupture, and code them separately.