The DOJ, along with attorneys general of New York and Minnesota, filed a lawsuit in federal court in the District of Columbia to block UnitedHealth Group (UHG)’s proposed acquisition of Change Healthcare—a healthcare technology company—into UHG’s Optum subsidiary. The lawsuit alleges that the acquisition of Change Healthcare would give United, a company that owns the largest health insurer in the country, access to healthcare data of competitor insurers, giving United an unfair advantage and harm competition in health insurance markets. The lessened competition would in turn result in higher cost and lower quality commercial health insurance for healthcare consumers. The lawsuit requests permanent injunction against the merger.

In September 2022, the district court approved the merger with an order to divest the claims editing business to private equity firm TPG Capital, and the deal went through the following month. The government filed an appeal in the D.C. Circuit Court in November 2022. However, in March 2023, the parties agreed to have the case voluntarily dismissed.