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Dr. Walther M. Pfeifer





Academic Commitments:   

  • MD from University of Wuerzburg, Germany 1987-1994
  • Internship in Hematology/Oncology, University of Wuerzburg, Germany 1994-1995
  • Bone Marrow Reference Center, Pathology Department Medizinische Hochschule Hannover 1995-1997
  • Research Fellowship in Hematopathology, Harvard University 1997-1999
  • Pathology Residency Training, University of Wuerzburg and Harvard University 1999-2007
  • Board Certification in Anatomic and Clinical Pathology 2007
  • Board Certification in Hematopathology 2008

Professional Commitments:

  • Staff Pathologist and Director of Flow Cytometry at Boston Medical Center 2007-2010
  • Associate Pathologist and Medical Director of Hematology at Mount Auburn Pathologist 2010-2014
  • Associate Pathologist at Pathologist Associates of Lowell 2014-2015
  • Laboratory Director East Side Clinical Laboratory 2015-present
  • Associate Medical Director, iMorpheus Information Services 2015-present
  • Medical Director of the Northeast Division of Sonic Healthcare 2016-present
  • Co-chairman Board of Directors, Constitution Diagnostics Network 2017-present


In mid-May 2015, Dr. Walther M. Pfeifer joined Sonic Healthcare as the Laboratory Director of East Side Clinical Laboratory in Rhode Island. He also serves as the Medical Director of the Northeast Division of Sonic Healthcare, is the Associate Medical Director of iMorpheus Information Services, and is on the Board of Directors for Constitution Diagnostics Network. Born and raised in Germany, he completed medical school at the University of Wuerzburg. This was followed by an internship in Hematology/Oncology during which he cared for patients and coordinated clinical trials involving treatments for hematologic disorders.  Subsequent years were spent in a hematopathology reference center and in basic science research involving malignant lymphomas.  After that, he completed his postgraduate training in Anatomic and Clinical Pathology in Boston, Massachusetts. He has served for many years as a diagnostic anatomic pathologist and worked in clinical pathology as the Medical Director of Hematology in both academic and private practice environments.  Dr. Pfeifer has an appointment as Adjunct Assistant Professor at the Boston University School of Medicine.


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