Mark E. Heiny, M.D, PhD is a pediatric hematologist at the Indiana Hemophilia and Thrombosis Center in Indianapolis, Indiana. Dr. Heiny earned his medical degree and PhD in Biochemistry from Indiana University. He subsequently served in residencies at Riley Hospital for Children in Indianapolis and St. Louis Children’s Hospital in Missouri, and completed his training with a Pediatric Hematology/Oncology fellowship at Washington University School of Medicine in St. Louis, Missouri. Clinical interests of Dr. Heiny include benign chronic hematologic disorders in children such as hemophilia and sickle cell disease, and blood clotting disorders including pediatric stroke. Dr. Heiny has been providing care for pediatric hemophilia patients in Indiana since 1996, and is currently a member of the pediatric team at the Indiana Hemophilia and Thrombosis Center (IHTC). IHTC provides clinical care for the majority of hemophilia patients in the state of Indiana, and their practice includes both pediatric and adult hematologists. IHTC physicians are physically located in the same building and clinic space, allowing for a smoother transition process for young adults with chronic diseases. Dr. Heiny has authored research in peer-reviewed publications such as the New England Journal of Medicine, Blood, and the Journal of Pediatrics.