Hospitals in states that expanded Medicaid enrollment are reporting a huge decrease in hospital stays by uninsured individuals. At the same time, stays by Medicaid patients are up.

A research team from the University of Michigan identified these trends by studying statistics in a recently created database maintained by the Agency for Healthcare Research and Quality. The researchers studied data for 15 states, a group that included some that had expanded Medicaid and others that had not.

Hospital stays by those without Medicaid plummeted by 50 percent in expansion states between the end of 2013 and the middle of 2014. During the same period, stays by those with Medicaid rose by 20 percent.

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Dan Cook

Dan Cook is a journalist and communications consultant based in Portland, OR. During his journalism career he has been a reporter and editor for a variety of media companies, including American Lawyer Media, BusinessWeek, Newhouse Newspapers, Knight-Ridder, Time Inc., and Reuters. He specializes in health care and insurance related coverage for BenefitsPRO.