Expsr to rdct in atmos pressr wh surfc fr dp-watr div, sqla

This code signifies long-term health problems or conditions that arise from a diver experiencing a rapid decrease in surrounding pressure during ascent from deep water. These sequelae are the lasting effects of decompression sickness or barotrauma sustained during the surfacing process.

Apply this code when documenting chronic neurological deficits, persistent joint pain, avascular necrosis, or other lasting organ damage directly attributable to a deep-water diving incident involving a reduction in atmospheric pressure during surfacing. This code is appropriate for follow-up encounters addressing these established, ongoing conditions.

• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., M87.1x for avascular necrosis).
• The "S" in the 7th character indicates sequela, meaning it's for conditions that are the late effects of the initial injury.
• Ensure documentation clearly links the current condition to the past diving incident involving rapid ascent.