Ambulance service is included in our family health insurance with Clinica Abel Gonzalez in Santo Domingo, but it is only good with one ambulance company, and our health insurance is only valid at Abel Gonzalez. They provide specialists under this coverage, but many of the older doctors do not accept it,a nd you end up paying them directly for their consultations.
There is a sticker on the back of my Insurance carnet with the ambulance company's telephone number. Not a bad deal, family health coverage is about RD$19,000 a year, and has normally paid about 60-65% of total costs when I have been hospitalized in the past.
(SORRY - forgot this is the Travel section- I am a resident here)
See my post in Living about the evacuation service through DAN - they pay up to US$5,000 for emergency services before evac)