9. Dr. Karen Kostroff
2004 Power List
Kostroff is chief breast surgeon at North Shore-Long Island Jewish Health System and an advocate for patients’ rights. LI breast cancer activists give her high praise, and she is often tapped by the media for her expertise. Each year she sees about 400 patients who have positive biopsies. A director of multidisciplinary breast tumor conferences, she also participates in multiple volunteer programs.