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Medicaid expansion produces significant health benefits, study finds

The first peer-reviewed comprehensive analysis of the effects of Medicaid expansion paints a picture of significant improvements in various health outcomes consistent with the original goals of the Affordable Care Act, also known as Obamacare.

Researchers analyzed 77 published peer-reviewed studies. They found expansion of Medicaid under the ACA was linked to increases in health coverage, use of health services and quality of care.

“Furthermore, very few studies reported that Medicaid expansion was associated with negative consequences, such as increased wait times for appointments,” said Nir Menachemi, a professor in the Indiana University Richard M. Fairbanks School of Public Health at IUPUI. Menachemi is chair of the school’s Department of Health Policy and Management and the senior author of the review article.

The analysis, “The Effects of Medicaid Expansion Under the ACA: A Systematic Review,” was published in the June issue of the journal Health Affairs.

Medicaid is the nation’s largest source of health coverage. As of May, 32 states and the District of Columbia had opted to expand Medicaid eligibility under the ACA to nonelderly adults with incomes up to 138 percent of the poverty level. Several other states are actively considering expanding their Medicaid programs.

The review excluded Medicaid expansions that occurred in individual states prior to the ACA.

Researchers found Medicaid expansion was related to increased insurance coverage among all potentially eligible individuals, regardless of race, age, marital status or income. They also said:

  • Health insurance gains were largest for adults without a college degree.
  • Short- and long-term un-insurance rates declined.
  • Use of primary care, mental health services and preventive care among Medicaid enrollees went up.
  • More low- and moderate-income adults had a regular source of care.
  • Reliance on emergency departments decreased.

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