Affordable Care Act open enrollment research
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Affordable Care Act Open Enrollment: Insurance Coverage and Access to Care
Research shows that the Affordable Care Act (ACA) open enrollment periods led to significant improvements in health insurance coverage and access to care for Americans. After the first and second open enrollment periods, the uninsured rate among adults dropped sharply, with millions gaining coverage. For example, the uninsured rate for adults aged 19 to 64 fell from 20% to 15% after the first open enrollment, representing about 9.5 million fewer uninsured adults. Young adults, especially those aged 19 to 34, saw the largest gains, with their uninsured rate dropping from 28% to 18% Sommers2015Collins2014Sommers2014.
Medicaid Expansion and Disparities in Coverage
States that expanded Medicaid under the ACA saw even greater improvements for low-income adults. These states experienced larger reductions in uninsured rates, better access to personal physicians, and easier access to medications compared to states that did not expand Medicaid. Minority groups, particularly Latino adults, benefited the most from these changes, with their uninsured rates dropping more than those of white adults Sommers2015Shartzer2015.
Improvements in Affordability and Health Outcomes
Alongside increased coverage, there were notable improvements in the affordability of care. Fewer adults reported being unable to afford needed care, and more people with new coverage were able to visit doctors, hospitals, or fill prescriptions—services they previously could not access or afford. These improvements were seen across all income groups, though gaps in access and affordability remained, especially for low-income adults Sommers2015Collins2014Shartzer2015.
Enrollment Strategies: Outreach, Assistance, and Education
Successful enrollment during ACA open enrollment periods relied on a mix of strategies. Community-based organizations often combined individual assistance, community outreach, and health education to help people enroll in Medicaid or marketplace plans. Other organizations used single strategies to reach larger populations. In rural areas, targeted outreach and education efforts helped thousands of residents enroll, and community mobilization efforts, such as those in Wyandotte County, Kansas, were linked to increased enrollment Kwon2014Fawcett2015Ercia2021.
Reducing Choice Errors: Nudges and Automatic Plan Switching
Recent research tested interventions to help low-income enrollees choose the best plans. Simple reminders (nudges) had a modest effect, but automatically switching eligible households to better plans led to much higher rates of optimal plan enrollment. This suggests that automatic enrollment strategies can be highly effective in reducing choice errors among low-income marketplace participants .
Public Awareness and Information Seeking
During the first open enrollment, there was a surge in online searches for ACA-related information, especially in areas with higher uninsured rates. This indicates that public interest and information-seeking behavior were closely tied to local needs and media attention .
Public Opinion and Political Impact
Gaining coverage through the ACA marketplaces led to more positive opinions of the law among beneficiaries. These changes in opinion persisted through subsequent elections, suggesting that personal experience with ACA benefits can influence public support and political attitudes .
Conclusion
The ACA open enrollment periods resulted in major gains in health insurance coverage, improved access to care, and better affordability for millions of Americans, especially in states that expanded Medicaid and among minority and low-income groups. Effective enrollment strategies included a combination of outreach, education, and direct assistance, with automatic plan switching showing promise for reducing choice errors. Despite progress, challenges in access and affordability remain, highlighting the need for continued efforts to reach underserved populations.
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