On February 3, 2023, the Department of Justice (DOJ) formally withdrew its support for three policies that created longstanding safe harbors from antitrust enforcement, relied upon by the healthcare industry for nearly thirty years. Assistant Attorney General, Jonathan Kanter, of the DOJ’s Antitrust Division stated that these changes were “long overdue”, and that the, “[DOJ] will continue to work to ensure that its enforcement efforts reflect modern market realities.” In striking these guidelines, the DOJ notably left no new guidelines in its place, leaving many healthcare providers and purchasers uncertain of whether they will face litigation or even criminal prosecution under the Sherman Act.