The Justice Department filed a complaint alleging some of the biggest Medicare insurers paid kickbacks to brokers that sell such plans, seeking to grab market share and in some cases avoid enrollees with disabilities who might come with heavy health costs.

The Department of Justice announced a lawsuit against three of the largest insurance companies -- Aetna, Elevance Health, and Humana -- accusing them of paying hundreds of millions of dollars in kickbacks to insurance brokers in return for enrollments in Medicare Advantage plans.