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Hospital giant AdventHealth is suing MultiPlan, alleging that the cost-management firm works with health insurers to systematically underpay for out-of-network medical claims.

Providers have lost at least $19 billion annually as a direct result of anticompetitive agreements with major payers, including UnitedHealth, Aetna, Elevance, Centene, Cigna, Humana and several Blue Cross Blue Shield insurers, the suit claims. MultiPlan called the lawsuit, which was filed last week in the U.S. District Court for the Southern District of New York, meritless.

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