Oak Street Health, Inc., through its subsidiaries, engages in designing and building the Oak Street platform to address the unmet needs of the chronically ill Medicare population in the United States. It operates primary care centers serving Medicare beneficiaries. The company contracts with health plans to generate medical costs savings and realize a return on its investment in primary care. As of March 31, 2020, it operated 54 centers in Illinois, Indiana, Michigan, Ohio, Pennsylvania, Rhode Island, North Carolina, and Tennessee. Oak Street Health, Inc. was founded in 2012 and is headquartered in Chicago, Illinois.