American Cancer Society Inc. (ACS) is one of the largest non-governmental investor in cancer research and a voluntary health organization in the United States. Based in Southfield, Mich., it provides a range of services, such as saving lives, cancer diagnosis, helping people get well and finding cures, among others. The organization has 12-chartered divisions, more than 900 local offices nationwide and a presence in more than 5,100 communities. American Cancer Society Inc. (ACS) is an (BBB) Better Business Bureaus accredited company.