UnitedHealth Group Incorporated (UnitedHealthcare) is a diversified health and well-being company. The Company operates in four segments: Health Care Services, OptumHealth, Ingenix and Prescription Solutions. The Health Care Services segment consists of UnitedHealthcare, Ovations and AmeriChoice businesses. OptumHealth serves approximately 60 million individuals with its diversified offering of health, financial and ancillary benefit services and products that assist consumers in navigating the healthcare system and accessing services. Ingenix offers database and data management services, software products, publications, consulting and actuarial services and business process outsourcing services. Prescription Solutions offers a suite of integrated pharmacy benefit management services to approximately 10 million people, through approximately 60,000 retail network pharmacies and two mail service facilities as of December 31, 2008. On May 30, 2008, it acquired Unison Health Plans.