Jonathan D. Levine, M.D.
Dr. Levine is Chair of the Department of Pathology, Medical Director of the Laboratory, and President of the Medical Staff. He is board certified by the American Board of Pathology in Anatomic and Clinical Pathology, and in the subspecialty of Cytopathology. He is a graduate of Cornell University, the University of Vermont College of Medicine, and completed residency and fellowship training at Brigham and Women’s Hospital.

Joseph P. Semple, M.D.
Dr. Semple is board certified by the American Board of Pathology/Anatomic and Clinical Pathology. He graduated from Tufts University School of Medicine, and completed his residency at Brigham & Women's Hospital. Dr. Semple is a Senior Attending physician at Middlesex Hospital.

Nathan C. Walk, M.D.
Dr. Walk is board certified by the American Board of Pathology in Anatomic and Clinical Pathology. He is subspecialty boarded by the American Boards of Pathology and Dermatology in Dermatopathology. He graduated from the Johns Hopkins School of Medicine, and completed his residency and fellowship training at Washington University in St. Louis.