HealthExtras recently changed its corporate name to Catalyst Health Solutions, Inc. Catalyst Health Solutions provides pharmacy benefit management services, referred to as PBM, and supplemental benefit programs. CHSI is built on strong, innovative principles in the management of prescription drug benefits and provides an unbiased, client-centered philosophy resulting in industry-leading client retention rates. CHSI's subsidiaries include Catalyst Rx, a full-service pharmacy benefit manager serving more than five million lives in the United States and Puerto Rico; HospiScript Services, LLC, one of the largest providers of pharmacy benefit management services to the hospice industry; and Immediate Pharmaceutical Services, Inc., a fully-integrated prescription mail service facility based out of Avon Lake, Ohio.