PacifiCare Health Systems, Inc. provides managed care and other health insurance products to employer groups, individuals, and Medicare beneficiaries in the United States and Guam. Its products include health insurance; health benefits administration; and indemnity insurance products, such as Medicare Supplement products offered through health maintenance organizations (HMO) and preferred provider organizations. The company also offers various specialty managed care products and services as a supplement to its basic commercial and senior medical plans or as stand-alone products. Its specialty managed care products include pharmacy benefit management (PBM) services, behavioral health services, group life and health insurance, and dental and vision benefit plans. The company had approximately 3.3 million HMO and other commercial and senior product members; and approximately 10.4 million members in its PBM, dental, and behavioral plans, as of December 31, 2004. PacifiCare Health Systems was founded in 1983 and is headquartered in Cypress, California. Pacificare Health Systems Inc. operates as a subsidiary of Unitedhealth Group Inc.