Dr. Filipovich has a special interest in histiocytic disorders, especially Hemophagocytic Lymphohistiocytosis (HLH). Other interests include bone marrow transplant for primary immune deficiencies and post-BMT immune reconstitution. She serves as president of the Histiocyte Society, an international group of more than 200 physicians and scientists who are committed to improving the lives of patients with histiocytosis through research.