The health-care plan which President Obama is credited with having spearheaded is known as the Patient Protection and Affordable Care Act, colloquially referred to as "Obamacare." It was signed into law on March 23, 2010, and its constitutionality was upheld by the U.S. Supreme Court on June 28, 2012.
More commonly known as the Affordable Care Act, this legislation represented the largest change to the U.S. health-care system since the creation of Medicare and Medicaid. Included in its provisions are specific changes to how health-insurance companies qualify individuals for coverage, protection for patients with pre-existing conditions and the elimination of lifetime maximums, or the most that an insurance provider pays for a single person's medical care. Further, this legislation required that basic preventive care be included as a fully covered benefit on all insurance plans. In addition, insurance providers were also limited on the percentage of total revenue from patient premiums that could be spent on expenses that were not related to health care. This means that the monthly cost of a health-insurance plan must be spent on patient care, rather than administrative costs. While contention over the law was heated, more than 8 million Americans signed up for coverage in the first year of enrollment.