Air ambulance prices more than doubled between 2008 and 2017

Air ambulances' use declined between 2008 and 2017 among people with employer coverage, but the average price of a trip more than doubled, according to new data from the Health Care Cost Institute, which is funded by insurers.

Why it matters: Air ambulances are a frequent source of surprise medical bills, and often aren't covered by private insurance. These bills can be for eye-popping amounts.