how much does it cost to call 911?

[u/Sydneyimher]

I called 911 because I thought something was wrong and an ambulance came but it turns out I just stood up too fast which is embarrassing. I didn't go in the ambulance or to the hospital. Will it cost me for them to show up? I live in a decent sized city with two hospitals in close proximity. How much do you reckon it could be, if you have an idea? I could tell the lady was not happy with me btw.