Ryan Peña, MD received his PhD, MD from Baylor College of Medicine. He completed residency in Clinical Pathology at the Massachusetts General Hospital (MGH). He subsequently completed fellowships at the Harvard Medical School Joint Program in Transfusion Medicine and Histocompatibility and Immunogenetics (HLA) fellowship at the MGH. He currently serves as the Director of the HLA Laboratory and is an attending physician on the Transfusion Medicine service at Beth Israel Deaconess Medical Center (BIDMC). His research interests include elucidating cellular and molecular pathomechanisms by which HLA alloimmunization leads to platelet refractoriness.