Barotrauma, sinus

This code describes an injury to the paranasal sinuses caused by changes in ambient pressure, often experienced during diving, flying, or hyperbaric oxygen therapy. It results from a pressure differential between the air within the sinuses and the surrounding environment, leading to pain, mucosal edema, and potentially hemorrhage.

Apply this code when documentation clearly indicates a diagnosis of barotrauma specifically affecting the sinus cavities. This typically occurs in patients presenting with facial pain, epistaxis, or headache following exposure to rapid pressure changes. Supporting documentation should include a history of pressure exposure and clinical findings consistent with sinus injury.

• Differentiate from other forms of barotrauma (e.g., otitic barotrauma) by ensuring the documentation specifies sinus involvement.
• Consider an external cause code (E-code) to identify the circumstances of the injury (e.g., E910.0 for diving accident).
• Do not use for sinusitis not directly caused by pressure changes; those would be coded to the 473.x series.