Emergency Room - Mercy Hospital Southwest is an emergency room that offers many services, including a primary stroke center, emergency medicine, and specialty service coverage. Visit Emergency Room - Mercy Hospital Southwest located at 400 Old River Rd, Bakersfield, CA. This Bakersfield emergency room is one of the best in California. As part of the Dignity Health network, Emergency Room - Mercy Hospital Southwest is dedicated to delivering high quality, compassionate care and access to Bakersfield and nearby communities.