There are a few in Sacramento. Lot's of hospital based services as you go north of Sacramento. Enloe, Redding Medical Center, Grass Valley, a few in Plumas county and on the north coast as well.
Go to the California EMS Authority and look up LEMSA, then for each LEMSA look up providers to find out who does what in each system.
Where on the Central Coast are you? You have AMR in Santa Cruz, Monterrey and Santa Barbara County, San Luis Ambulance in San Luis Obispo county. That's ALS for the Central Coast. Do not know of any BLS however that could have changed in the last few years.