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John D. Pfeifer, M.D., Ph.D

Dr. Pfeifer is the Vice Chairman for Clinical Affairs, Department of Pathology & Immunology and Professor of Pathology & Immunology for the Washington University School of Medicine. Dr. Pfeifer is board certified in Anatomic Pathology and subspecialty board certified in Molecular Genetic Pathology, and has been a practicing surgical pathologist for over 20 years.

His academic interests are primarily focused on investigation of the role of molecular genetic testing in the analysis of tissue specimens, specifically on the methods and clinical settings in which molecular testing provides independent information that increases diagnostic accuracy, provides more accurate prognostic estimates, or can be used to guide therapy.