Rush Prudential HMO, Inc. v. Moran, 536 U.S. 355 (2002), was a decision by the Supreme Court of the United States, which ruled that the federal Employee Retirement Income Security Act (ERISA)[1] did not preempt an Illinois medical-review statute.

The statute at issue in Moran regulated insurance, which is one of the functions HMOs perform.

Although HMOs provide healthcare as well as insurance, the statute does not require choosing a single or primary function of an HMO.

Congress has long recognized that HMOs are risk-bearing organizations subject to state regulation.

Finally, allowing States to regulate the insurance aspects of HMOs will not interfere with the desire of Congress for uniform national standards under ERISA.