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Charges for air ambulance services were 4.1-9.5 times higher than what Medicare paid for the same services in 2016. The median charge ratios (the charge divided by the Medicare rate) for the services increased by 46-61 percent in 2012-16. Air ambulance charges varied substantially across the US, and some of the largest providers had among the highest charges.
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Bai et al. (2019) studied this question.
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