For any fire, police or medical emergency, you can dial 911. Dispatchers will be able to assess your emergency and send the appropriate response team.
The following are private ambulance companies that provide emergency transport:
PRN Ambulance
http://www.prnambulance.com
345 South Woods Avenue
Los Angles, CA 90022
(866) 776-4262
Schaefer Ambulance Service
http://www.schaeferamb.com/
4627 Beverly Blvd.
Los Angeles, CA 90004
(323) 468-1600
Med Life Ambulance Services
http://medlifeambulance.com
4304 Alger Street
Los Angeles, CA 90039
(877) 463-3543