Mercy Health, formerly Catholic Health Partners, is a Catholic health care system with locations in Ohio and Kentucky. Cincinnati-based Mercy Health operates more than 250 healthcare organizations in Ohio and Kentucky. Mercy Health is the largest health system in Ohio and the state's fourth-largest employer. On September 1, 2018 Mercy Health and Bon Secours Health System USA combined to become Bon Secours Mercy Health. Bon Secours Mercy Health headquarters are co-located with Mercy Heath in Cincinnati, Ohio.