SAN DIEGO--(BUSINESS WIRE)--Feb. 2, 2005--MedImpact, the nation’s largest privately held pharmacy benefit management (PBM) company, is pleased to announce a new program that will bring better value and new choices for 225,000 Health Alliance members in Illinois and Iowa. The new program, Choice90RX, offers Health Alliance members the option of purchasing a 90-day supply of maintenance medications at participating retail pharmacies for the same cost as mail order.