What is a key law or regulating the health care industry?

A key law regulating the health care industry in the United States is the Affordable Care Act (ACA), enacted in 2010. The ACA aimed to expand access to health insurance, improve the quality of care, and reduce healthcare costs. It introduced measures such as the establishment of health insurance marketplaces, the expansion of Medicaid, and the prohibition of denying coverage based on pre-existing conditions. This law significantly reshaped the landscape of healthcare delivery and insurance in the U.S.