In the United States, charity care is health care provided for free or at reduced prices to low income patients. The percentage of doctors providing charity care dropped from 76% in 1996–97 to 68% in 2004–2005. Potential reasons for the decline include changes in physician practice patterns and increasing financial pressures. In 2006, Senate investigators found that many hospitals did not inform patients that charity care was available. Some for-profit hospitals provided as much charity care as some non-profit hospitals. Investigators also found non-profit hospitals charging poor, uninsured patients more than they did patients with health insurance. Hospitals must provide some charity care if they wish to maintain non-profit status.

One estimate put the cost of uncompensated care for 2004 at $41 billion, of which $34.6 billion was funded through a patchwork of government programs. Over half of all government reimbursement for uncompensated care comes from the federal government; most of that is provided through Medicare and Medicaid. These federal funds are a primary source of support for health care providers that serve the uninsured. Increasing demand for free and low-cost health care services by uninsured patients and Medicaid beneficiaries is, along with increased competition, placing a growing financial strain on safety-net health care providers. Some safety-net providers are responding by trying to limit their charity care exposure and attract more paying customers.