| Alta California | Alpine, Colusa, El Dorado, Nevada, Placer, Sacramento, Sierra, Sutter, Yolo, Yuba | 916-978-6400 |
| Central Valley | Fresno, Kings, Madera, Mariposa, Merced, Tulare | 559-276-4300 |
| Eastern Los Angeles | LA County health districts of Alhambra, East Los Angeles, Northeast, Whittier | 626-299-4700 |
| Far Northern | Butte, Glenn, Lassen, Modoc, Plumas, Shasta, Siskiyou, Tehama, Trinity | 530-222-4791 |
| Frank D. Lanterman | LA County health districts of Central, Glendale, Hollywood-Wilshire, Pasadena | 213-383-1300 |
| Golden Gate | Marin, San Francisco, San Mateo | 415-546-9222 |
| Harbor | Health districts of Bellflower, Harbor, Long Beach, Torrance | 310-543-0100 |
| Inland | Riverside, San Bernardino | 909-890-3000 |
| Kern | Inyo, Kern, Mono | 661-327-8531 |
| North Bay | Napa, Solano, Sonoma | 707-256-1182 |
| North Los Angeles County | Health districts of East Valley, San Fernando, West Valley | 818-778-1900 |
| Redwood Coast | Del Norte, Humboldt, Mendocino, Lake | 707-462-3832 ext. 289 |
| Regional Center of the East Bay | Alameda, Contra Costa | 510-618-6100 |
| Regional Center of Orange County | Orange | 714-796-5100 |
| San Andreas | Monterey, San Benito, Santa Clara, Santa Cruz | 408-374-9960 |
| San Diego | Imperial, San Diego | 858-576-2996 |
| San Gabriel/Pomona | LA County cities of El Monte, Monrovia, Pomona, Glendora | 909-620-7722 |
| South Central Los Angeles | LA County health districts of Compton, San Antonio, South, Southeast, Southwest | 213-744-7000 |
| Tri Counties | San Luis Obispo, Santa Barbara, Ventura | 805-962-7881 |
| Valley Mountain | Amador, Calaveras, San Joaquin, Stanislaus, Tuolumne | 209-473-0951 |
| Westside | LA County health districts of Inglewood, Santa Monica-West | 310-258-4000 |