Core and Primary Faculty

Joan Ash, Ph.D., M.L.S., M.S., M.B.A.


Professor and Vice Chair

Research Areas: Implementation of Clinical Information Systems, Computerized Physician Order Entry.

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Arie Baratt

Eilis Boudreau

Timothy Burdick, M.D., MSc

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Assistant Professor

Research interests: Applied clinical informatics, including use of health information technology (HIT) to improve healthcare systems; use of quality improvement methods and design thinking to create, implement, and iteratively improve HIT.

Rochelle Fu

Amy Cantor

Nancy Carney, Ph.D.


Research Associate Professor


Michael F. Chiang, M.D.



Research Areas: Telemedicine. Computer-based image analysis for clinical diagnosis. Implemntation and evaluation of EHR systems.
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Roger Chou, M.D.



Director, Pacific Northwest Evidence-based Practice Center

Research Interests: Development of evidence-based guidelines for both health screening and the management of pain conditions.

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Aaron M. Cohen, M.D., M.S.


Associate Professor

Research Interests: Biomedical text-mining, development and application for biomedical researchers.

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Elizabeth Crabtree

David Dorr, M.D., M.S.


Associate Professor and Vice Chair, Clinical Informatics

Research Interests: Care Management Plus, ICCIS, and TOPMED projects: coordination of care for at-risk persons such as older adults, collaborative care, predictive analytics, chronic disease management, and clinical information system requirements to support the above areas.

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Karen Eden, Ph.D.


Associate Professor

Research Interests: Patient and clinician decision-making. Design and evaluation of computerized decision aids for obstetrics, mammograms, smoking-cessation, safety planning for abused women, and fertility preservation for young women.

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Tracy Edinger

Justin Fletcher, Ph.D., M.S.


Assistant Professor

Research Interests: Policy definition and security implementation related to EHR implementation from the executive perspective.

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Paul Gorman, M.D.



Research Interests: Use of information by clinicians and experts in real-world problem-solving focused on patient care. Naturalistic decision-making, information needs, distributed cooperative problem-solving, distributed cognition, and social informatics.

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Melissa Haendel, Ph.D.


Assistant Professor

Research Interests: Development of anatomical and phenotype ontologies for relating genotypes to phenotypes, Semantic Web technologies, researcher networking, scientific reproducibility, data curation, and user interface design and testing.

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Mark Helfand, M.D., M.P.H.



Interests: Use of systematic reviews to inform clinical and public policy, methods for comparative effectiveness research, patient stories.
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William Hersh, M.D.


Professor and Chair

Research Interests: Use of knowledge-based information by healthcare practitioners and researchers. Design of information retrieval systems and educational technologies.

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Michelle Hribar, Ph.D.



Research Interests: Usability for medical informatics and high performance computing applications.

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Linda Humphrey

Holly Jimison

Jayashree Kalpathy-Cramer, Ph.D., M.S.


Adjunct Assistant Professor

Research Interests: Use of image processing and machine learning techniques for medical image analysis and retrieval, imaging for radiation therapy and survival analysis for cancer.

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Lisa Karstens, Ph.D., MBI

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Assistant professor

Research Interests: Using bioinformatics to understand human disease.

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Ted Laderas, Ph.D.

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Research Interests: Phenotypic Heterogeneity of Cancer and Measurement using Flow Cytometry Methods, Systems Biology of Cancer.  

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Michael Lieberman, M.D.


Assistant Professor

Research Interests: Clinical quality measurement.  I  503-494-2670

Judith Logan, M.D.


Professor Emeritus

Research Interests: Dr. Logan's research interests center around the secondary use of clinical data for research, with attention on user interfaces, underlying controlled vocabularies, and data structures.

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Robert Lowe, M.D., M.P.H.



Research Interests: Relationship between emergency department use and access to primary care, especially among vulnerable populations.

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Marian McDonagh, Pharm.D.



Research Interests: Comparative systematic reviews methodology and evidence-based medicine as applied to competing interventions.

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Shannon McWeeney, Ph.D.


Professor and Head of Division of Bioinformatics & Computational Biology

Research Interests: Development and application of statistical and computational methodologies for functional genomics data such as gene expression (microarray and RNA-seq), chIP-Seq and proteomics.

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Vishnu Mohan, M.D., M.B.I.


Assistant Professor

Research Interests: Dr. Mohan is interested in how clinicians make decisions, how they interact with technology, and how technology influences their decision-making, especially in the context of improving patient safety.

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Michael Mooney, Ph.D.



Research Interests: Development of statistical and computational for understanding how DNA variation influences human disease.

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Motomi Mori

Cynthia Morris, Ph.D., M.P.H.


Professor and Vice Chair

Research Interests: Etiology and epidemiology of congenital heart disease and epidemiology of cardiovascular disease.

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Heidi Nelson, M.D., M.P.H.


Research Professor

Research Interests: Treatment of menopausal symptoms, osteoporosis screening, diagnosis, and treatment, BRCA genetic testing for breast and ovarian cancer susceptibility, and screening for speech and language delay in children, among others.

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Bjorn Pederson

Kathryn I. Pyle, A.M.L.S., M.A.


Assistant Professor

Research Interests: Scientific writing and communication.

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Robert Schuff, M.S.



Research Interests: Clinical research informatics. Design and implementation of tools and methods for clinical and translational research. Secondary use of clinical data for research.  I  503-494-5654

Robert Searles

Shelley Selph

Xubo Song, Ph.D.



Research Interests: Digital image and video processing; statistical pattern recognition; machine learning; sensor fusion; computer vision; information theory; biomedical engineering.

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Annette Totten, Ph.D.


Assistant Professor

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Joanne Valerius, M.P.H., Ph.D.

Joanne Valerius, MPH, PHD

Assistant Professor

Dr. Valerus is recent recipient of Health Information Management Triumph Award for Educators. The Educator Award honors those who demonstrate excellence in preparing the next generation of professionals for their Health Information Management careers.

Research Interests: Human resource development in health care settings. Her focus is on a holistic approach to the workplace and how diversity impacts the workplace.

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Amanda Vinson, PhD

Research Assistant Professor  

Amanda Vinson is a Research Assistant Professor in the Primate Genetics Section in the Division of Neuroscience at the Oregon National Primate Research Center (ONPRC), an Assistant Professor in the Department of Medical Informatics and Clinical Epidemiology, and an affiliate member of the Knight Cardiovascular Institute at Oregon Health & Science University, Portland, OR. In addition to her research, Dr. Vinson is also responsible for curating pedigree and genotype data on ~4,500 non-human primates at the ONPRC, in order to develop resources for genetic epidemiological research and to maintain colony genetic health.

Research Interest: Finding genetic determinants of cardiovascular disease traits that are conserved between macaques and humans, in order to improve human health. Especially interested in identifying genetic influences on lipoprotein cholesterol content, particle function, and adiposity as risk factors for cardiovascular disease in humans | 503-418-8391

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Nicole G. Weiskopf, Ph.D

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Assistant Professor

Nicole G. Weiskopf, Ph.D., is an Assistant Professor in the Department of Medical Informatics and Clinical Epidemiology at OHSU. Dr. Weiskopf earned her B.A. in psychology at Wesleyan University, after which she worked in the areas of eating disorder and schizophrenia research for a number of years. After growing interested in the issues surrounding clinical research, including workflows, inefficiencies, and data collection practices, Dr. Weiskopf joined the graduate program at Columbia University’s Department of Biomedical Informatics, where she earned her M.A. and Ph.D.

Research Interests: The secondary use of electronic health record (EHR) data. Her dissertation work centered on the assessment and reporting of EHR data quality problems and the development of guidelines to improve the validity and transparency of clinical research efforts that rely on clinical data sources.

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Beth Wilmot, Ph.D.

Beth Wilmot


Research Interests: Development and application of statistical and computational methodologies for analysis of genomic data (gene expression, SNP variation and copy number variation).

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Stephen Wu Ph.D.

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Assistant Professor  

Research Interests: Natural language processing, information retrieval, computational semantics, psycholinguistics. The secondary use of EHRs for improved epidemiological research and clinical care.

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Thomas Yackel, M.D., M.S.


Associate Professor

Research Interests: Applied medical informatics, specifically, the use of clinical information systems to improve patient care.

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Jianji Yang

Christina Zheng, Ph.D.

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Associate Professor

Research Interests: Understanding gene regulatory models in relation to disease progression through the development and application of computational/statistical methods for functional genomics (large scale sequencing, DNA, RNA).

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Steven Z. Kassakian, M.D., M.S., FACP

Steven Kassakian

Assistant Professor

Medical Director of Clinical Informatics Research Areas: Clinical decision support.

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Steve received a B.S. in oceanography and chemistry from the University of Washington. Following this he worked for a short while as an Oceanographer studying nitrogen cycling in deep sea sediments. He completed medical school as part of the Brown University and Dartmouth University combined program. Steve completed both his residency and chief residency in internal medicine at Brown University in Providence, RI. 

Steven recently completed a National Library of Medicine Fellowship in Biomedical Informatics at OHSU and also an M.S. in Biomedical Informatics. Steve is particularly interested in clinical decision support and how these systems can be used to improve outcomes, provider efficiency and patient engagement. Steve also serves as a Medical Director of Clinical Informatics helping OHSU optimize the use of the electronic health record. Additionally, he is a faculty member in the Department of Medicine and practices as a general internist.  

When Steve is not at work he can usually be found spending time with his wife and two young children or kite boarding somewhere along the Columbia Gorge.