100 Most Influential People in Healthcare – 2018

As head of Children's Hospital of Philadelphia since 2015, Bell oversees 14,000 employees at the health system and its research institute. Bell has spoken out on the policy of separating immigrant families, calling for quick reunification of parents and their children. "As healthcare providers, it is our responsibility to advocate for those who do not have a voice. Quickly reuniting these families will help ensure these children can lead healthy and fulfilling lives," she said in a statement in late June.