https://www.sciencedaily.com/releases/2018/06/180604172739.htm

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.