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Dr. Walther M. Pfeifer is a practicing pathologist and a specialist in laboratory medicine with over two decades of training. He has served for many years in key positions at top medical facilities such as Boston Medical Center and Sunrise Medical Laboratories. He is currently the Medical Director of the Northeast for Sonic.

Dr. Philip Molloy is a practicing clinician and rheumatologist, trained under Dr. Allen Steere (the discoverer of Lyme disease). He has since had longstanding clinical and research interest in TBDs. His contributions include characterizing and diagnosing B. miyamotoi and developing laboratory tests to distinguish Lyme disease from the Lyme vaccine serological response; and blood tests for screening blood donors for Babesia.

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​​​​​​​Walther M. Pfeifer, MD

Medical Director,
Sonic Healthcare USA Northeast

University of Wuerzburg
Fellowship, Harvard University
Residency, University of Wuerzburg and Harvard University

Board Certifications:
Anatomic and Clinical Pathology

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Philip Molloy, MD

Medical Director, Tickborne Disease Program, Sonic Healthcare USA

Tufts University School of Medicine
Fellowship, New England
Medical Center
Residency, University of Minnesota

Board Certifications:
Internal Medicine