Sen. Elizabeth Warren (D-Mass.), Rep. Alexandria Ocasio-Cortez (D-N.Y.) and other Democratic lawmakers are preparing to introduce the Stop Corporate Takeovers of Physicians Act in the Senate and House of Representatives on Wednesday. An earlier account described the bill as introduced that day, while the latest update characterizes its status as pending introduction. The measure would establish a federal ban on the corporate practice of medicine by barring private equity firms, insurers and other for-profit corporations from owning or controlling physician practices. It would also target management services organizations (MSOs), administrative companies that lawmakers say can gain influence over staffing, compensation, scheduling, billing and other operational decisions. The proposal follows accelerating healthcare consolidation and draws on recent state measures that supporters say have slowed deal activity, including Oregon legislation enacted in 2025. Research from the Physicians Advocacy Institute and Avalere Health found that more than 82% of physicians were employed by hospitals or corporate entities in January 2026, while hospitals and corporate entities owned 63.9% of practices nationally and corporate entities owned 33.2%. Corporate entities acquired more than 52,000 physician practices between 2018 and 2026. The bill would prohibit friendly or captive physician arrangements, require physician owners to remain meaningfully involved in patient care in the state where their practice operates, restrict corporate interference with clinical decisions and limit certain non-compete, nondisclosure and non-disparagement clauses. It would provide enforcement tools involving the Federal Trade Commission (FTC), state attorneys general and physicians through a private right of action that could permit treble damages, as well as requiring divestment in certain circumstances.