A spectrum of cerebral and pulmonary syndromes ranging from mild discomfort to fatal illness that occurs on ascent to higher altitudes as a direct result of inadequate acclimatizatio...
AMS: mild to moderate symptoms
Headache, plus at least one of:
Nausea or vomiting
Dizziness or light-headedness
AMS: severe symptoms
Individuals without previous altitude exposure should adhere to acclimatization guidelines.
Stop ascent, acclimatize at the same altitude, and/or descend if symptoms do not ab...
For mild cases, no follow-up is needed.
For more severe cases, follow closely until symptoms subside.
Imray C, Booth A, Wright A, et al. Acute altitude illnesses. BMJ. 2011;343:d4943.
Jin J. Acute mountain sickness. JAMA. 2017;318(18):1840.
Luks AM, McIntosh SE, Grissom CK...
T70.20XA Unspecified effects of high altitude, initial encounter
T70.20XD Unspecified effects of high altitude, subsequent encounter
T70.20XS Unspecified effects of high altitude, sequela
Slow ascent and timely descent are important to prevent and treat high-altitude illnesses.
Lack of symptom resolution with appropriate descent suggests an alternative diagnosis.
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