Exposure to prolonged high air pressure, subs encntr

This code signifies a patient's exposure to elevated atmospheric pressure, such as during diving or working in hyperbaric environments, when they are receiving follow-up care for conditions or symptoms related to this exposure. It indicates that the initial event of exposure has already occurred, and the current encounter is for ongoing management or assessment.

Use this code for subsequent visits where a patient is being treated for conditions like decompression sickness (the "bends"), barotrauma, or other physiological effects resulting from prolonged high air pressure exposure. This applies when the patient is no longer in the acute phase of the injury but requires continued medical attention.

• Ensure the encounter is for follow-up care, not the initial presentation of the injury.
• Always code the specific injury or condition resulting from the exposure first, followed by this external cause code.
• Verify documentation clearly indicates "subsequent encounter" for the high air pressure exposure.