Northwestern Medicine formerly Northwestern Memorial Healthcare, is a non-profit healthcare system affiliated with the Northwestern University Feinberg School of Medicine, in Chicago, Illinois. Members include research hospitals, acute care facilities, and academic centers. Northwestern Medicine's flagship hospital is the nationally-ranked, Northwestern Memorial Hospital which is also the regions tertiary hospital for adults. Along with their 10 hospitals and physicians offices, Northwestern Medicine operates a network of urgent care centers across the region. While not directly operated with Northwestern Medicine, the network maintains close affiliations with the nearby Ann & Robert H. Lurie Children's Hospital of Chicago and the Shirley Ryan AbilityLab, collaborating with them for many of their services.