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 Cedar Falls Medical Center, Community Level IV Trauma Designation MercyOne Oelwein Medical Center, Community Level IV Trauma Designation. 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.