While politically difficult, some politicians and observers have argued for a single-payer system. A bill, the United States National Health Care Act, was first proposed by Representative John Conyers in 2003 and has been perennially proposed since, including during the debate on the public option and the Patient Protection and Affordable Care Act. President Obama has come out against a single-payer reform at this time, stating in the joint session of Congress that "it makes more sense to build on what works and fix what doesn't, rather than try to build an entirely new system from scratch." Obama had previously expressed that he is a proponent of a single payer universal health care program during an AFL-CIO conference in 2003.
Nearly one in three patients receiving NHS hospital treatment is privately insured and could have the cost paid for by their insurer. Some private schemes provide cash payments to patients who opt for NHS treatment, to deter use of private facilities. A report, by private health analysts Laing and Buisson, in November 2012, estimated that more than 250,000 operations were performed on patients with private medical insurance each year at a cost of £359 million. In addition, £609 million was spent on emergency medical or surgical treatment. Private medical insurance does not normally cover emergency treatment but subsequent recovery could be paid for if the patient were moved into a private patient unit.
Accident insurance was first offered in the United States by the Franklin Health Assurance Company of Massachusetts. This firm, founded in 1850, offered insurance against injuries arising from railroad and steamboat accidents. Sixty organizations were offering accident insurance in the U.S. by 1866, but the industry consolidated rapidly soon thereafter. While there were earlier experiments, the origins of sickness coverage in the U.S. effectively date from 1890. The first employer-sponsored group disability policy was issued in 1911.
Network-based plans may be either closed or open. With a closed network, enrollees' expenses are generally only covered when they go to network providers. Only limited services are covered outside the network—typically only emergency and out-of-area care. Most traditional HMOs were closed network plans. Open network plans provide some coverage when an enrollee uses non-network provider, generally at a lower benefit level to encourage the use of network providers. Most preferred provider organization plans are open-network (those that are not are often described as exclusive provider organizations, or EPOs), as are point of service (POS) plans.
Most aspects of private health insurance in Australia are regulated by the Private Health Insurance Act 2007. Complaints and reporting of the private health industry is carried out by an independent government agency, the Private Health Insurance Ombudsman. The ombudsman publishes an annual report that outlines the number and nature of complaints per health fund compared to their market share 
Plans with much higher deductibles than traditional health plans—primarily providing coverage for catastrophic illness—have been introduced. Because of the high deductible, these provide little coverage for everyday expenses—and thus have potentially high out-of-pocket expenses—but do cover major expenses. Couple with these are various forms of savings plans.
Public polling consistently showed majority support for a public option. A July 2009 survey by the Quinnipiac University Polling Institute found that 28% of Americans would like to purchase a public plan while 53% would prefer to have a private plan. It also stated that 69% would support its creation in the first place. Survey USA estimated that the majority of Americans (77%) feel that it is either "Quite Important" or "Extremely Important" to "give people a choice of both a public plan administered by the federal government and a private plan for their health insurance" in August 2009. A Rasmussen Reports poll taken on August 17–18 stated that 57% of Americans did not support the current health care bill being considered by Congress that did not include a public option, a change from their findings in July 2009. A NBC News/Wall Street Journal poll, conducted August 15–17, found that 47% of Americans opposed the idea of a public option and 43% expressed support. A Pew Research Center report published on October 8, 2009 stated that 55% of Americans favor a government health insurance plan to compete with private plans. The results were very similar to their polling from July, which found 52% support. An October 2009 Washington Post/ABC poll showed 57% support, a USA Today/Gallup survey described by a USA Today article on October 27 found that 50% of Americans supported a government plan proposal, and a poll from November 10 and 11 by Angus Reid Public Opinion found that 52% of Americans supported a public plan. On October 27, journalist Ray Suarez of The News Hour with Jim Lehrer noted that "public opinion researchers say the tide has been shifting over the last several weeks, and now is not spectacularly, but solidly in favor of a public option."
In the run-up to the 2016 Democratic National Convention, the Democratic Platform Committee approved a plank supporting the addition of a public option onto the Affordable Care Act. The decision was seen as a compromise measure between the Hillary Clinton campaign who during the 2016 presidential primaries advocated for keeping and reforming the ACA, and the Bernie Sanders campaign who advocated for repealing and replacing the ACA with a single-payer Medicare for All program. The Clinton campaign stated shortly before the plank was added that as president Clinton would "pursue efforts to give Americans in every state in the country the choice of a public-option insurance plan", while Bernie Sanders applauded the decision to "see that all Americans have the right to choose a public option in their health care exchange, which will lower the cost of healthcare". The call was echoed by President Obama, who in an article for the American Medical Association stated that Congress "should revisit a public plan to compete alongside private insurers in areas of the country where competition is limited."
Americans are required to carry medical insurance that meets federally designated minimum standards or face a tax penalty. In certain cases, taxpayers may qualify for an exemption from the penalty if they were unable to obtain insurance due to financial hardship or other situations. Two public health insurance plans, Medicare and the Children's Health Insurance Program, target older individuals and children, respectively. Medicare also serves people with certain disabilities. The program is available to anyone age 65 or older. The CHIP plan has income limits and covers babies and children up to the age of 18.
The Affordable Care Act of 2010 was designed primarily to extend health coverage to those without it by expanding Medicaid, creating financial incentives for employers to offer coverage, and requiring those without employer or public coverage to purchase insurance in newly created health insurance exchanges. This requirement for almost all individuals to maintain health insurance is often referred to as the "individual mandate." The CBO has estimated that roughly 33 million who would have otherwise been uninsured will receive coverage because of the act by 2022.