Key Takeaways Shares of Humana and other health insurers fell Thursday after the Centers for Medicare & Medicaid Services said it plans a "significant expansion" of its auditing efforts for Medicare Advantage plans.

The Trump administration plans to expand government audits of private Medicare health plans, adding more scrutiny to an industry that’s been a profit driver for insurers.

Bertha Coombs reports on shares of Medicare Advantage health insurers coming under pressure after the Centers For Medicare and Medicaid announces a significant ramp up in auditing of plans’ billing practices.