St Mark's Hospital-Emergency Center, 36480 5 Mile Rd, Livonia, MI 48154, US

ER-One is a physician-owned emergency medicine management group that recruits physicians, nurse practitioners and physician assistants to health care facilities. Its clients include Oakwood Hospital & Medical Center, Annapolis Hospital, Southshore Medical Center, Canton Center, Lapeer Regional Medical Center and St Joseph's Mercy of Macomb. ER-One offers a wide range of services that include recruitment, credentialing, coding and billing services. The company is governed by a board of directors. ER-One has affiliation by the Oakwood Healthcare System, the American College of Emergency Physicians, the Michigan College of Emergency Physicians and the American Medical Association. The company is located in Livonia, Mich.