A 19-month-old baby from Brazil needed a high-altitude field rescue and medical evacuation from Dingboche, Nepal, (14,470 feet/4,410 meters) after developing symptoms of acute mountain sickness (AMS). The Dingboche-based medical clinic staff reported the baby registered low oxygen levels, elevated heart rate, rapid breathing, and cyanosis (skin bluing). Due to the baby’s worsening condition, Global Rescue medical operations activated an airborne medical evacuation. She was safely transported to a hospital in Kathmandu, where she was evaluated, treated and admitted. Fortunately, the baby’s symptoms improved significantly at the lower elevation and with treatment. She was discharged to her parent the next day with a diagnosis of AMS.