PacifiCare Health Systems is headquartered in California and serves about 3.3 million health plan customers nationwide. PacifiCare originally was an HMO and HMO products continue to be the company's strength. Medicare beneficiaries are served through Secure Horizons, the largest Medicare HMO in the U.S. Virtually all of PacifiCare Health Insurance commercial group health plans have been Accredited and rated Excellent by the National Committee for Quality Assurance (NCQA).
In 2005, PacifiCare became a wholly owned subsidiary of the UnitedHealth Group. UnitedHealth Group serves 54.7 million people throughout the U.S..
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