The operational heart of the Department of Justice’s antitrust probe into Claritev Corporation (formerly MultiPlan) lies in a specific and illegal configuration known as a "hub-and-spoke" conspiracy. Federal investigators and class-action plaintiffs allege this structure allowed the nation's largest insurance carriers to bypass competitive market forces entirely. The central entity, Claritev, acts as the "hub." The major insurers—UnitedHealth Group, Cigna, Aetna, and Elevance Health—serve as the "spokes." The rim that connects these spokes is a shared, secret agreement to utilize Claritev’s algorithmic pricing tools, specifically Data iSight, to systematically suppress out-of-network reimbursement rates. This mechanism ensures that no single insurer risks losing market share by underpaying providers. They all underpay together.

Antitrust laws, specifically Section 1 of the Sherman Act, strictly prohibit competitors from colluding to fix prices. A standard price-fixing cartel involves direct communication between competitors. The hub-and-spoke model is more insidious. It uses a third-party intermediary to facilitate the collusion. In this case, Claritev is that intermediary. The company markets itself as a cost-containment solution. But federal filings from 2024 and 2025 describe it as a "mafia-like enforcer" for a cartel. The rebranding from MultiPlan to Claritev in early 2025 did nothing to alter the underlying mechanics of this scheme. It merely painted a new logo on an engine designed to extract billions from American healthcare providers.