Blister pack with dollars instead of pills (Photo: Shutterstock)

A U.S. House committee has launched an investigation into the role of pharmacy benefit managers in rising health care costs.

The House Oversight and Accountability Committee sent letters to the nation’s three largest PBMs – CVS Caremark (CVS Health); Express Scripts (Cigna) and Optum Rx (UnitedHealth Group) seeking documents about drug-price rebates they negotiate and fees they charge.


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