With 491 licensed beds between the three medical centers, each providing 24-hour emergency lifesaving care, MercyOne is there for you in critical moments: MercyOne Waterloo Medical Center, an Area Level III Trauma Center and an accredited chest pain center. MercyOne Medical Group - Northeast Iowa is made up of more than 30 primary care, pediatric, internal medicine and specialty clinics located throughout Black Hawk, Bremer, Buchanan, Benton, Butler, Fayette and Tama counties.