Other effects of high altitude, sequela

This code signifies long-term or residual health problems that are a direct consequence of a previous high-altitude exposure, but are not specifically classified as acute mountain sickness, high altitude cerebral edema, or high altitude pulmonary edema. These are conditions that persist after the initial acute phase of altitude illness has resolved.

Use this code when documenting chronic neurological deficits, persistent respiratory issues, or other lasting physiological changes clearly attributable to a past episode of high-altitude exposure. This applies to conditions that manifest or continue after the patient has descended from altitude and the acute symptoms have subsided.

• Always use in conjunction with a code identifying the specific sequela (e.g., chronic headache, persistent fatigue).
• Ensure documentation clearly links the current condition to a past high-altitude event.
• The "S" seventh character indicates sequela, meaning it's for conditions that are the late effects of the initial injury or illness.