Who We Are

PPMI is a collaboration of researchers, funders, and study participants working toward the goal of identifying progression biomarkers to improve PD therapeutics.

Steering Committee

The PPMI Steering Committee is responsible for the scientific rationale, study design, site selection, logistics, data management and analysis planning for the study.

To communicate with a member of the PPMI Steering Committee, contact us.


Ken Marek, MD

Committee Chair, PPMI Principal Investigator
President and Senior Scientist, Institute of Neurodegenerative Disorders

Sohini Chowdhury

Deputy CEO, Michael J. Fox Foundation for Parkinson's Research

Christopher S. Coffey, PhD

Director, Statistics Core Clinical Trials Statistical and Data Management Center Professor, University of Iowa

Tatiana Foroud, PhD

Director, Hereditary Diseases and Family Studies, Indiana University

Mark Frasier, PhD, Chief Scientific Officer, Research Programs

Senior Vice President, Research Programs, Michael J. Fox Foundation for Parkinson's Research

Lana Chahine, MD

Assistant Professor of Neurology, University of Pennsylvania

Karl Kieburtz, MD, MPH

Professor of Neurology and Community and Preventive Medicine, University of Rochester

Brit Mollenhauer, MD

Assistant Professor, University of Goettingen
Attending Neurologist, Head of Clinical Research, Paracelsus Elena Klinik

Werner Poewe, MD

Director, Department of Neurology, Medical University of Innsbruck

Kathleen Poston, MD MS

Associate Professor of Neurology, Stanford University Medical Center

John Seibyl, MD

Executive Director and Senior Scientist, Institute of Neurodegenerative Disorders

Leslie M. Shaw, PhD

Professor, University of Pennsylvania

Tanya Simuni, MD

Associate Professor of Neurology and Director, Parkinson's Disease and Movement Disorders Program, Northwestern University

Andrew Siderowf, MD, MSCE

Professor, University of Pennsylvania

Andrew Singleton, PhD

Investigator, National Institute on Aging

Caroline Tanner, MD, PhD

University of California at San Francisco School of Medicine

Arthur Toga, PhD

Director, Laboratory of Neuro Imaging (LONI), University of Southern California

Duygu Tosun-Turgut, PhD

Assistant Professor of Radiology
Department of Radiology, University of California San Francisco

John Trojanowski, MD, PhD

Professor, University of Pennsylvania