Hello all, there are several ambulance services that operate on the Navajo Reservation, the main one, largest one is Navajo EMS with 44 ambulances, when I was volunteering on the rez in the early early 90's there call #'s were from MED-10 to MED-48, our district in Tuba City had MED-21, MED-26 & MED-27, they changed there call #'s recently to align with the police districts, example MED-62 would be Kayenta EMS, other ambulance providers now are Sacred Mountain EMS, Utah Navajo Health Corportation, Ganado Fire Department, Navajo Nation Fire, Action Medical Service, Rough Rock Search & Rescue & Winslow Indian Health Center