UnitedHealth Group Incorporated (UnitedHealth Group) is a diversified health and well-being company, serving approximately 70 million Americans. The Company provides individuals with access to healthcare services and resources through more than 560,000 physicians and other healthcare providers and 4,800 hospitals across the United States. UnitedHealth Group conducts its operations through four operating divisions: Health Care Services, OptumHealth, Ingenix and Prescription Solutions. On January 10, 2008, the Company acquired Fiserv Health, Inc. (Fiserv Health), a subsidiary of Fiserv, Inc. Fiserv Health is an administrator of medical benefits and also provides care facilitation services, specialty health solutions and pharmacy benefit management (PBM) services. The acquired businesses will each align with the Company's Health Care Services, OptumHealth, Ingenix and Prescription Solutions segments. In February 2008, the Company acquired Sierra Health Services, Inc.