The Affordable Care Act (ACA) is comprehensive healthcare reform legislation that was signed into law in 2010. It expanded access to health insurance coverage in three primary ways: by expanding Medicaid eligibility; creating health insurance exchanges; and preventing insurance companies from denying coverage due to pre-existing conditions. The ACA was intended to provide more affordable health insurance options for millions of uninsured Americans and supports innovative healthcare delivery methods. It established different metal-tiered health insurance plan options that vary in out-of-pocket costs and premiums.