Prime Therapeutics company, a pharmacy benefits manager (PBM), is owned by and provides services to about a dozen Blue Cross Blue Shield organizations and their members. Prime also services other health care plans used by unions, employers, and third-party administrators, ultimately serving about 17 million members. The company's clients benefit from services that include pharmacy network management, benefit administration, claims processing, marketing support, report building, and formulary design, a process through which drugs are approved for use in a network.