Quality of Care for White and Hispanic Medicare Advantage Enrollees in the United States and Puerto Rico.

Abstract
Fifty years ago, the Medicare program extended health insurance to older adults and persons with disabilities across the 50 states; Washington, DC; and the US territories. Although all Medicare enrollees receive a standard set of insurance benefits, stark geographic and racial variations in care and outcomes have been well documented1,2 and are the focus of attention from policymakers. Of note, few studies include Medicare beneficiaries living in the US territories.