| Allied Emergency Physicians | Simi Valley Hospital | Simi Valley | |
| Antelope Valley Emergency Medicine Associates | Antelope Valley Hospital | Lancaster | |
| Berkeley Emergency Medical Group | Alta Bates Summit Medical Center - Alta Bates Campus | Berkeley | |
| Berkeley Emergency Medical Group | Alta Bates Summit Medical Center - Summit Campus | Oakland | |
| Central Coast Emergency Physicians | Sierra Vista Regional Medical Center | San Luis Obispo | |
| Central Coast Emergency Physicians | Twin Cities Community Hospital | Templeton | |
| Chula Vista Emergency Physicians | Scripps Mercy Chula Vista | Chula Vista | |
| Culver Emergency Medical Group | Southern California Hospital at Culver City | Culver City | |
| Eastern Sierra Emergency Physicians | | | |
| Eden Emergency Medical Group | Eden Medical Center | Castro Valley | |
| Emergency Medicine Specialists of Orange County | Children's Hospital of Orange County | Orange | |
| Emergency Medicine Specialists of Orange County | St. Joseph Hospital | Orange | |
| Emergency Specialist Physicians Med Association | Providence Little Company of Mary Medical Center - Torrance | Torrance | |
| Fountain Valley Emergency Physicians | Fountain Valley Regional Hospital | Fountain Valley | |
| Glendale Adventist Emergency Physicians | Adventist Health Glendale | Glendale | |
| Intercommunity Emergency Medical Group | Presbyterian Intercommunity Hospital | Whittier | |
| Los Robles Emergency Physicians Medical Group | Los Robles Hospital & Medical Center | Thousand Oaks | |
| Mills Peninsula Emergency Medical Assoc., Inc. | Mills-Peninsula Medical Center | Burlingame | |
| Monterey Bay Emergency Emergency Physicians Medical Corporation | Community Hospital of the Monterey Peninsula | Monterey | |
| Napa Valley Emergency Medical Group | Queen of the Valley Medical Center | Napa | |
| Newport Emergency Medical Group | Hoag Hospital Irvine | Irvine | |
| Newport Emergency Medical Group | Hoag Memorial Hospital Presbyterian | Newport Beach | |
| Pacific Emergency Providers | Scripps Mercy Hospital | San Diego | |
| Pinnacle Emergency Physicians of Bakersfield | Bakersfield Memorial Hospital | | |
| Placentia Linda Emergency Physicians | Placentia Linda Hospital | Placentia | |
| Riverside Emergency Physicians Medical Group | Parkview Community Hospital | Riverside | |
| Saint Johns Emergency Medicine Speacialists | Providence Saint John's Health Center | Santa Monica | |
| South Coast Emergency Medical Group | Goleta Valley Cottage Hospital | Goleta | |
| South Coast Emergency Medical Group | Santa Barbara Cottage Hospital | Santa Barbara | |
| Southern California Emergency Medical Group | Providence Little Company of Mary San Pedro Medical Center | San Pedro | |
| Swope Emergency Medical Inc. | Sierra Nevada Memorial Hospital | Grass Valley | |
