- Anaheim General Hospital in Anaheim, California (CA)
- Anaheim Memorial Hospital in Anaheim, California (CA)
- Buena Park Medical Center in Buena Park, California (CA)
- Chapman Medical Center in Orange, California (CA)
- Coastal Communities Hospital in Santa Ana, California (CA)
- College Hospital Costa Mesa in Costa Mesa, California (CA)
- Fairview Developmental Center in Costa Mesa, California (CA)
- Fountain Valley Regional Hospital and Medical Center in Fountain Valley, California (CA)
- Friendly Hills Regional Medical Center in La Habra, California (CA)
- Garden Grove Hospital and Medical Center in Garden Grove, California (CA)
- Hoag Memorial Hospital Presbyterian in Newport Beach, California (CA)
- Huntington Beach Hospital in Huntington Beach, California (CA)
- Irvine Regional Hospital in Irvine, California (CA)
- Kaiser Foundation Hospital Anaheim in Anaheim, California (CA)
- La Palma Intercommunity Hospital in La Palma, California (CA)
- Los Alamitos Medical Center in Los Alamitos, California (CA)
- Mission Hospital Regional Medical Center in Mission Viejo, California (CA)
- Newport Harbor Psychiatric Institute in Newport Beach, California (CA)
- Orange Coast Memorial Medical Center in Fountain Valley, California (CA)
- Pacifica Hospital in Huntington Beach, California (CA)
- Placentia-Linda Hospital in Placentia, California (CA)
- Saddleback Memorial Medical Center in Laguna Hills, California (CA)
- Saddleback Memorial Medical Center - San Clemente in San Clemente, California (CA)
- Santa Ana Hospital Medical Center Inc in Santa Ana, California (CA)
- South Coast Medical Center in Laguna Beach, California (CA)
- St Joseph Hospital in Orange, California (CA)
- St Jude Medical Center in Fullerton, California (CA)
- Suncrest Hospital of Orange County in Stanton, California (CA)
- Tustin Hospital and Medical Center in Tustin, California (CA)
- Univ of California Irvine Medical Center in Orange, California (CA)
- Vencor Hospital-Orange County in Westminster, California (CA)
- West Anaheim Medical Center in Anaheim, California (CA)
- Western Medical Center Hosp Anaheim in Anaheim, California (CA)
- Western Medical Center Santa Ana in Santa Ana, California (CA)