High level blast overpressure in war operations, init

This code signifies an injury sustained from the intense pressure wave generated by an explosion during military combat or war operations. It specifically refers to the initial presentation of a patient experiencing symptoms or injuries directly attributable to this blast overpressure.

Apply this code when documenting the first encounter for a service member or civilian injured by a high-level blast overpressure event in a war zone. This includes injuries like concussions, ear drum perforations, lung contusions, or other internal damage caused by the pressure wave itself, as opposed to penetrating trauma from shrapnel.

• Always use with an external cause code (e.g., Y93.C9) to specify the activity at the time of injury.
• Ensure this is the initial encounter for the specific blast overpressure injury; subsequent encounters will use the appropriate subsequent encounter code.
• Distinguish from injuries caused by shrapnel or other projectiles, which would be coded separately.