To improve the field of knowledge in Evidence-based Medicine for clinical practice. This means to add to the scientific understanding of how scientific studies can be applied in clinical practice and what needs more study. Once the information is known, then SEMPI will help practicing professionals learn as well as give a place to provide feedback for future improvements.


SEMPI is a nonprofit, 501(c)4, headquartered in Minneapolis, MN. It represents, however, many practicing professionals across the United States, who are interested in the goal of using evidence-based medicine to improve the practice of medicine for the benefit of patients and the community. The participants who serve on panels represent a broad array of organizations, including the military, academic health institutions, private practices, Evidence-based Practice Centers, clinics, and hospitals. The topic areas of expertise vary, as well as the professional health degrees that they hold. All of this all- encompassing array of experience and background gives the content development process a more robust quality. The panels represent more than just one local “practice” or specialty or organizational perspective. This means that the diversity of panelists’ backgrounds ensures there is greater generalizability of the recommendations.

Board of Directors and Governance

Dr. Ayis Pyrros
Dr. Ayis Pyrros is board certified in diagnostic radiology and neuroradiology. He graduated from Thomas Jefferson Medical College in Philadelphia, PA and completed his residency and fellowship at Northwestern Memorial Hospital in Chicago, IL. He has been on the staff at Community Healthcare Partners for Munster Radiology Group for the last 7 years and is currently practicing radiology with the DuPage Medical Group, Chicago, IL. Dr. Pyrros has a Diplomate certificate in Clinical Informatics from the American Board of Preventive Medicine and is a recognized entrepreneur and co-founder of MDNetX, a start-up helping doctors understand local market dynamics.
Dr. David Williams
Dr. David Williams is a certified in internal medicine and infectious diseases physician. Dr. Williams has been a Professor of Medicine,University of Minnesota Medical School and graduated from the University of Edinburgh, Scotland, United Kingdom. He completed his residency at the University of Edinburgh Hospital, University of Birmingham, and Sheffield. He finished his fellowship at the Harvard Medical School, Boston, MA.  Dr. Williams was on staff at the Hennepin County Medical Center, a teaching hospital associated with the U of M for over 20 years. Currently, he currently practicing as a primary care consultant.
Dr. Naveen Garg
Dr. Garg currently serves as an Associate Professor in the Department of Diagnostic Radiology, Division of Diagnostic Imaging, at the University of Texas MD Anderson Cancer Center, Houston, TX. He obtained his medical degree from the University of Texas Southwestern Medical School in Dallas, TX and completed his fellowship in body MRI from The University of Texas Houston. Dr. Garg is interested in improving the practice of radiology by more effective utilization of computing resources and data. He has a Diplomate certificate in Clinical Informatics from the American Board of Preventive Medicine. His research interests include development of radiologist user interface tools, imaging segmentation, search and analytics of the electronic medical record.

Executive Director

V. Katherine Gray
Executive Director
V. Katherine Gray, PhD, who is Executive Director of SEMPI, has been called “a pioneer in health care quality and efficiency improvement.” Her twenty-five year career has included management positions in many segments of the health care industry, including HMO's and managed care, health care management for self-insured employers, long-term care, hospital systems, Medicaid and Medicare risk contracting, and specialty care clinic systems. She has been a senior executive at Physicians' Health Plan (now Medica)--a United Healthcare Corporation managed health plan, Health Risk Management, the Center for Diagnostic Imaging, HealthOne Corporation--a hospital corporation, the Ebenezer Center for Aging and, in 1997, Dr. Gray founded Sage Health Management Solutions, Inc. and has led an experienced team to develop a patented technology to improve the diagnostic process using Computerized Provider Order Entry (CPOE) combined with evidence-based imaging clinical decision support.
As part of SEMPI, Dr. Gray will provide expertise on various panels in one or more of the following areas: clinical trial or research design, statistical analysis, medical informatics, and quality improvement.

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5001 American Blvd W
Suite #765
Minneapolis, MN 55437
Email: info@sempi.org
The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, allergic reactions, or adverse effects. Clinicians must at all times use their independent medical or professional judgement.