Prior to joining Hematology Oncology of Indiana in July of 2001, Dr. Birhiray practiced medical oncology at Marshfield Cancer Center in Marshfield, Wisconsin, where he served as director of the bone marrow transplant program. Dr. Birhiray earned a Doctor of Medicine degree from the University of Benin, Nigeria, and completed his internal medicine residency at Columbus Hospital (an affiliate of Northwestern University) in Chicago, Illinois. He completed fellowships in bone marrow transplant and medical oncology at Johns Hopkins University and The National Cancer Institute in Bethesda, Maryland, respectively. Dr. Birhiray has participated in research and has published on the subjects of immunotherapy, lymphomas and bone marrow transplantation. Dr. Birhiray is a member of the American Society of Clinical Oncology, American Society of Hematology, American Medical Association and Wisconsin Medical Society.