Newswise — New Brunswick, NJ – States that expanded eligibility for their Medicaid program in 2014 when the Affordable Care Act (ACA) was implemented, saw fewer uninsured patients among major cardiac-related hospitalizations in the first year compared with states that did not expand the program, according to a study released today by the Journal of the American Medical Association Network.

One goal of the Affordable Care Act was to broaden access of health care coverage to low-income individuals and families by expanding Medicaid. However, states were able to choose whether or not they extended Medicaid eligibility, potentially leading to differences in insurance coverage levels across the country for those in lower socioeconomic groups, which have been shown to experience a higher rate of cardiovascular-related and other chronic illnesses. Led by a physician from Rutgers Robert Wood Johnson Medical School, the study looked at the differences in the rate of hospitalizations for significant cardiovascular-related events of uninsured individuals before and after the implementation of the ACA.

“The expansion of Medicaid health coverage due to the Affordable Care Act appears to have been associated with an immediate reduction in the percentage of individuals hospitalized without insurance,” said Ehimare Akhabue, MD, a cardiologist and assistant professor of medicine at Robert Wood Johnson Medical School, who conducted the study while on faculty at Northwestern University Feinberg School of Medicine in Chicago. “The data suggest that states that expanded eligibility had a marked decrease in the rates of uninsured hospitalizations compared with states that did not, during the first full year of the ACA implementation.”

The researchers analyzed a large sample of data from the Healthcare Cost and Utilization Project State Databases, which is publicly available, de-identified data from the Agency for Healthcare Research and Quality. The study included hospitalizations not covered by Medicare for three major cardiovascular events: heart attack, stroke and heart failure, from 2009, the year prior to the ACA becoming law, through 2014, the first full year following implementation of the ACA. After removing states from the study with incomplete data, the research team examined information from 30 states in total–17 of which expanded Medicaid eligibility in 2014 and 13 of which did not–constituting nearly three-quarters of the U.S. population and more than 3 million hospitalizations during that time period.

The study is believed to be one of the first to analyze the association between state-level policy regarding Medicaid expansion and changes in uninsured hospitalizations for major cardiovascular events, although prior studies concluded that states which expanded coverage through Medicaid as a result of the ACA had, in general, seen fewer hospitalizations of individuals without insurance. The team also looked at in-hospital deaths of uninsured individuals as a result of cardiovascular events and found no significant change following Medicaid expansion.

Although the team did not examine the economic outcomes of a decrease in uninsured hospitalizations in states that expanded Medicaid, it is believed that their findings could potentially have important cost implications for patients, hospitals and policymakers. The study emphasized that many other factors could affect the economic impact of Medicaid expansion, but given that cardiovascular disease is one of the leading public health concerns and a prominent source of medical expenditures it was important to document the potential associations with state and federal policy.

Dr. Akhabue completed the study with colleagues from the Department of Preventive Medicine and the Division of Cardiology in the Department of Medicine at Northwestern University Feinberg School of Medicine, Chicago. The study can be found at:

This research was supported in part by a grant from the American Heart Association (15SFDRN25080331). The funding source had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review or approval of the manuscript; and decision to submit the manuscript for publication.

About Rutgers Robert Wood Johnson Medical School

As one of the nation’s leading comprehensive medical schools, Robert Wood Johnson Medical School is dedicated to the pursuit of excellence in education, research, health care delivery, and the promotion of community health. Part of Rutgers, The State University of New Jersey, Robert Wood Johnson Medical School encompasses 20 basic science and clinical departments, and hosts centers and institutes including The Cardiovascular Institute, the Child Health Institute of New Jersey, and the Women’s Health Institute. The medical school has been recognized by U.S. News & World Report as among the top 100 medical schools in the nation and No. 1 in the state for research and primary care.

Robert Wood Johnson Medical School and Robert Wood Johnson University Hospital, an RWJBarnabas Health facility and the medical school’s principal affiliate, comprise one of the nation’s premier academic medical centers. Clinical services are provided by more than 500 faculty physicians in 200+ specialties and subspecialties as part of Rutgers Health, the clinical arm of Rutgers University. To learn more about Rutgers Robert Wood Johnson Medical School, visit