Since 2014, millions of parents and other adults have been able to access health insurance for the first time either through the Medicaid expansion (10 million) or the new marketplaces (11.5 million) created under the Affordable Care Act (ACA). The rate of uninsured adults under age 65 declined significantly in 2014, the first year of full ACA implementation (See chart below). Health care coverage for adults is not only important for their own health, it influences the healthy development of young children.