Expsr to high air pressure from rapid descent in water, init

This code signifies an injury or adverse health effect resulting from a sudden and significant increase in ambient pressure due to a rapid descent while submerged in water. This typically involves barotrauma affecting various body cavities, such as the ears, sinuses, or lungs, caused by the inability to equalize pressure during the rapid depth change.

Apply this code when documenting conditions like middle ear barotrauma, sinus squeeze, or pulmonary barotrauma that occur during an initial diving incident involving a rapid descent. This is appropriate for the first time a patient presents for treatment of injuries sustained during such an event.

• Ensure documentation clearly states the injury occurred during a rapid descent in water.
• Confirm this is the patient's first encounter for treatment of this specific injury.
• Code any specific resulting injuries (e.g., tympanic membrane rupture) in addition to this external cause code.