Caremark Rx, Inc. operates as a pharmaceutical services company in the United States. The company offers pharmacy benefit management services that involve the design and administration of programs for prescription drug use. It dispenses pharmaceuticals to eligible participants in benefit plans maintained by its customers; and utilizes its information systems to perform safety checks, drug interaction screening, and generic substitution. Caremark Rx’s AccordantCare health management program covers various diseases, including asthma, coronary artery disease, congestive heart failure, diabetes, hemophilia, rheumatoid arthritis, and multiple sclerosis. It provides prescription drugs both directly, through its own mail service pharmacies, and indirectly through a network of third-party retail pharmacies. As of December 31, 2006, the company operated 7 automated mail service pharmacies and 21 smaller regional mail service pharmacies. It also managed 516 million prescriptions from approximately 2,000 organizations. Caremark Rx’s customers include employers, unions, government employee groups, insurance companies, managed care organizations, and individuals. The company was founded in 1993 and is headquartered in Nashville, Tennessee. As of March 22, 2007, Caremark RX Inc. is a subsidiary of CVS/Caremark Corp.