Emergency Room - Mercy Medical Center Merced is an emergency room that offers many services, including a primary stroke center, 22 private rooms, and child-friendly emergency care. Visit Emergency Room - Mercy Medical Center Merced located at 333 Mercy Ave, Merced, CA. This Merced emergency room is one of the best in California. As part of the Dignity Health network, Emergency Room - Mercy Medical Center Merced is dedicated to delivering high quality, compassionate care and access to Merced and nearby communities.