Expsr to chng in air pressr in arcrft during ascent, sequela

This code signifies a health condition or symptom that arises as a delayed effect from an individual's exposure to rapid changes in air pressure experienced during an aircraft's ascent. These sequelae can manifest days, weeks, or even months after the initial pressure change event, affecting various body systems.

Use this code when documenting a diagnosis directly attributable to a past incident of sudden air pressure change during an aircraft's climb. This includes conditions like chronic barotitis media, persistent sinus barotrauma, or other long-term effects. It should be applied when the acute phase of the injury has passed, and the patient is presenting with residual symptoms or conditions.

• Always ensure documentation clearly links the current condition to a past aircraft ascent pressure change.
• Requires a seventh character to indicate the sequela (S).
• Do not use for acute injuries; refer to codes for initial encounters (A) or subsequent encounters (D) for acute barotrauma.