Private health insurance may be purchased on a group basis (e.g., by a firm to cover its employees) or purchased by individual consumers. Most Americans with private health insurance receive it through an employer-sponsored program. According to the United States Census Bureau, some 60% of Americans are covered through an employer, while about 9% purchase health insurance directly.[53] Private insurance was billed for 12.2 million inpatient hospital stays in 2011, incurring approximately 29% ($112.5 billion) of the total aggregate inpatient hospital costs in the United States.[12]

An alternative proposal is to subsidize private, non-profit health insurance cooperatives to get them to become large and established enough to possibly provide cost savings[27][28] Democratic politicians such as Howard Dean were critical of abandoning a public option in favor of co-ops, raising questions about the ability of the cooperatives to compete with existing private insurers.[6] Paul Krugman also questioned the ability of cooperatives to compete.[29]
Health insurance absorbs or offsets healthcare costs associated with, but not limited to, routine health examinations, specialist referral visits, inpatient and outpatient surgery, unforeseen eventualities such as illnesses or injuries, and prescription medication. Health insurance policies are categorized as privately paid for by an individual, publicly provided as a service through Social Security, or commercially arranged by a company as part of an employee benefit package.
Michael F. Cannon, a senior fellow of the libertarian CATO Institute, has argued that the federal government can hide inefficiencies in its administration and draw away consumers from private insurance even if the government offers an inferior product. A study by the Congressional Budget Office found that profits accounted for only about 4 or 5 percent of private health insurance premiums, and Cannon argued that the lack of a profit motive reduces incentives to eliminate wasteful administrative costs.[38]
If an employer pays the cost of an accident or health insurance plan for his/her employees, including an employee’s spouse and dependents, the employer’s payments are not wages and are not subject to Social Security, Medicare, and FUTA taxes, or federal income tax withholding.  Generally, this exclusion also applies to qualified long-term care insurance contracts.  However, the cost of health insurance benefits must be included in the wages of S corporation employees who own more than two percent of the S corporation (two percent shareholders).
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.[17]

The share of Americans without health insurance has been cut in half since 2013. Many of the reforms instituted by the Affordable Care Act of 2010 were designed to extend health care coverage to those without it; however, high cost growth continues unabated.[3] National health expenditures are projected to grow 4.7% per person per year from 2016 to 2025. Public healthcare spending was 29% of federal mandated spending in 1990 and 35% of it in 2000. It is also projected to be roughly half in 2025.[4]