LAKE FOREST, IL--(Marketwire - July 15, 2010) - Trustmark has entered into an agreement with CVS Caremark to provide pharmacy benefits management services to all its small group, large group and association fully-insured and self-funded clients effective July 1, 2010. CVS Caremark was chosen because of its excellent customer service, exceptional savings for members and its shared philosophy of being personal, flexible and trusted.