The United States Department of Justice has filed a complaint under the False Claims Act against three national health insurance companies and three brokers, alleging their involvement in an unlawful kickback scheme related to Medicare Advantage plans. The complaint accuses these entities of systematically paying illegal kickbacks and engaging in discriminatory practices against disabled Americans. Notable companies mentioned in the allegations include Aetna, Humana, CVS, and Elevance Health. The legal actions have led to significant stock drops for implicated firms, reflecting investor concerns over the potential ramifications of these accusations.