Primary blast injury of ear, bilateral, initial encounter

This code signifies damage to both ears resulting from the direct impact of a blast wave, such as from an explosion. This injury typically involves barotrauma to the tympanic membrane and middle ear structures due to rapid pressure changes.

Apply this code when documentation clearly indicates a patient presenting with ear injuries on both sides directly caused by a primary blast event. This is used for the initial assessment and treatment of such an injury. Look for terms like "blast ear," "tympanic membrane rupture from blast," or "hemotympanum due to explosion" affecting both ears.

• Ensure documentation specifies "bilateral" involvement and "initial encounter."
• Distinguish from secondary blast injuries (e.g., penetrating trauma from flying debris) or tertiary blast injuries (e.g., impact with an object).
• Code any associated specific ear injuries (e.g., tympanic membrane rupture, ossicular dislocation) in addition to this code.