a subsidiary. In May 2018, a whistleblower lawsuit was filed against CVS Caremark alleging fraud by. The whistleblower alleged that CVS Caremark was charging Medicaid and Medicare customers more for their prescriptions than was appropriate. In January 2019, Walmart announced that it would no longer use CVS Caremark as its pharmacy benefit manager. In January 2020, CVS Caremark announced RxZero, a program that would allow patients with diabetes to pay no copays. In February 2020, Alan Lotvin was appointed president of CVS Caremark. References External links 1993 establishments in Alabama 2007 mergers and acquisitions American companies established in 1993 American corporate subsidiaries Companies based in Providence County, Rhode Island Corporate spin-offs Caremark Health care companies based in Rhode Island Health care companies established in 1993 Pharmacy benefit management companies based in the United States Woonsocket, Rhode Island