Expsr to oth rapid changes in air pressr dur descent, sqla

This code signifies a lasting health condition resulting from exposure to rapid changes in air pressure during a descent, excluding those specifically related to diving or aviation. It indicates a chronic or residual effect of such an event, rather than the acute injury itself. The sequela could manifest as various physiological impairments.

Use this code when documenting a patient's current health problem that is directly attributed to a past incident of rapid barometric pressure changes during a descent, such as those experienced in caisson work, tunneling, or other non-diving/non-aviation scenarios. This code is appropriate for conditions like chronic barotrauma, persistent inner ear dysfunction, or neurological deficits that are a direct consequence of the historical pressure exposure.

• This code is for the sequela (late effect) of the exposure, not the initial acute event.
• Always code the specific nature of the sequela (e.g., chronic otitis media, neurological deficit) first, followed by this external cause code.
• Ensure documentation clearly links the current condition to a past rapid pressure change during descent.