In the case of United States v. Oregon State Medical Society et al., 1951, the U.S Supreme Court ruled against a plan developed by doctors in Portland, Oregon to fix prices for medical services. The court held that this price-fixing scheme violated federal antitrust laws under the Sherman Act. The physicians had formed an organization called "Community Hospital Service Inc." (CHS), which offered prepaid medical care plans with fixed rates for specific services. CHS would then contract with participating doctors who agreed to provide these services at set prices and not bill patients directly or charge more than what was established by CHS's schedule of fees. However, the government argued that this arrangement restrained trade and competition among doctors because it prevented them from setting their own prices independently based on market conditions or individual patient needs.

The dissenting opinion in the United States v. Oregon State Medical Society case argued that the majority's decision was a misinterpretation of the Sherman Act and its application to non-profit organizations like medical societies. The dissenters believed that these types of organizations should not be subject to antitrust laws because their primary purpose is not commercial competition, but rather public service. They also pointed out that there were other regulatory mechanisms available for addressing any potential abuses by such entities, including state law and professional ethics rules. Furthermore, they disagreed with the majority's view on price-fixing agreements among doctors as being inherently illegal under antitrust laws; instead arguing it could potentially benefit patients by ensuring quality care at reasonable prices.