Wentworth to lead pharmacy benefit firm Express Scripts

Who: Tim Wentworth, 53

Promoted to: President of Express Scripts Holding Co., the nation's largest pharmacy benefit manager

New role: Taking over responsibility for the core business from Chairman and CEO George Paz, who had also served as president since 2003

Previous roles: Senor VP and president of sales and account management for the company; president of national and key accounts for Medco Health Solutions, another PBM that was acquired by Express Scripts in 2011; president and CEO of Accredo Health Group, a Medco subsidiary

Why now? Express Scripts completed its $29 billion merger with Medco in 2012. “Creating a president's position, particularly with an incumbent who has spent so much time in the market, was a natural evolution for a company of our size.”

On controlling drug costs: “Specialty drugs represent an increasingly growing part of our clients' drug spend and something they are very concerned about. We have a series of tools that don't compromise patient care but ensure that our clients use our scale and our operational excellence to their advantage.”