'called ambulance' is correct and can be used in written English.
It can be used to indicate that someone called an ambulance, usually in an emergency situation. For example: "We heard a loud crash and immediately called an ambulance."
And, along with people who are not yet married but who paid Celebration Studios in advance, they are vetting countless online offers from album makers, video editors and last-minute photographers engaged in what one bride-to-be called "ambulance chasing".
(And it's much better than being called "ambulance drivers!").
During the American Civil War vehicles for conveying the wounded off the field of battle were called ambulance wagons.
The doctor arrived at the following 9.30 – called ambulance – hospital 10.30.
1 Associated with crowding, ambulance offload time (AOT) delay (i.e. extended time from ambulance arrival to ED to offload onto hospital stretcher, also called ambulance ramping) has emerged as an issue affecting care quality, patient safety and ability to respond to the surrounding community.
He called ambulances to help transport bloodied survivors.
What we're seeing now is rightly called ambulance-chasing, but it's even worse than that.
Defence Secretary Michael Fallon has criticised what he called "ambulance-chasing British law firms" and argued there is "a strong case" for suspending the European human rights law when sending forces into action overseas.
Offer to call ambulance but be afraid to offer to perform CPR 72 (48.6%) 28 (50.9%) C.
They have often helped the most desperate, calling ambulances for children or pregnant women.
The health workers call ambulances, again provided by UNFPA, when labour begins.
