School of Medicine


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  • Jeffrey Howard Kleck

    Jeffrey Howard Kleck

    Adjunct Professor, Rad/Molecular Imaging Program at Stanford

    BioDr. Jeff Kleck

    Current Roles
    Adjunct Professor, Stanford University School of Medicine — Stanford, California
    Senior Partner, Eleven of Ten (Elevens) — Menlo Park, California
    Chairman, Open Power & Energy Network (OPEN) — Washington, District of Columbia
    Senior Advisor, United States Department of War (US DoW) — Pentagon, Arlington, Virginia

    Previous Academic Appointments
    Dean of Academics, Catholic Institute of Technology (CIT) — Cambridge, Massachusetts & Castel Gandolfo, Italy
    Adjunct Associate Professor, University of California, Los Angeles (UCLA)
    Visiting Scientist, Lawrence Berkeley National Laboratory (LBNL)
    Visiting Scientist, Los Alamos National Laboratory (LANL)

    Previous Commercial Technology Ventures
    President and Board Member, Rapid AI
    Founder, CEO, and Chairman of the Board, Attainia
    Founder, CEO, and Chairman of the Board, Neoforma

    Previous Government Service
    Senior Advisor, United States Department of Defense (US DoD)
    Director, Defense Innovation Unit (DIU), United States Department of Defense (US DoD)

    Education
    Ph.D., Biomedical Physics, University of California, Los Angeles (UCLA)
    M.S., Engineering Management, Stanford University, Stanford
    M.S., Nuclear Engineering, Texas A&M University, College Station (TAMU)
    B.S., Nuclear Engineering, Texas A&M University, College Station (TAMU)
    St. John's University, Collegeville (SJU)
    The University of Texas, Austin (UT)

    Awards in Current Roles
    Ukraine Foreign Military Medal, bestowed by the Commander of the Ukraine Armed Forces (2023)
    U.S. Department of Defense Award for Team Cyber & IT Excellence, bestowed by the US DoD Chief Information Officer (2019)

  • John Kleimeyer, MD

    John Kleimeyer, MD

    Clinical Assistant Professor, Orthopaedic Surgery

    BioDr. Kleimeyer specializes in orthopaedic spine surgery, treating cervical, thoracic and lumbar spine disorders including disc herniations, stenosis, myelopathy, fractures, scoliosis and more. He treats both simple and complex spine problems including revisions. His goal is to provide the most minimally invasive solution to improve patients’ quality of life. This includes less invasive discectomies, decompressions, disc replacements, and fusions. He is particularly focused on single-position procedures to limit surgical time and recovery.

    Prior to coming to the Stanford Department of Orthopaedic Surgery and the Stanford Spine Center, Dr. Kleimeyer completed his residency in orthopaedic surgery at Stanford University where he was elected to the Alpha Omega Alpha honor society. He then completed his spine fellowship at the renowned Emory University Spine Center. He is board-certified.

    Dr. Kleimeyer has received honors and recognition for his research in the fields of orthopaedic surgery and spine surgery. He participates in national and international specialty societies and as a journal reviewer. His research interests include improving clinical outcomes of surgical and nonsurgical care, the genetics of orthopaedic and spine disorders, and cost efficacy. Dr. Kleimeyer has published over 20 journal articles in addition to other reviews and textbook chapters, and has presented research nationally and internationally.

  • Clarissa Klein

    Clarissa Klein

    Scientific Data Curator 2, Biomedical Data Science

    BioScientific curator and coordinator for the Clinical Genome Resource (ClinGen) and the Pharmacogenomics Knowledgebase (PharmGKB) / ClinPGx. Program Manager for Stanford ClinGen.

    Coordinator for ClinGen's Data Access, Protection, and Confidentiality (DAPC) Working Group, the Rheumatologic and Autoimmune Diseases Clinical Domain Working Group (RAD-CDWG), Multigenic Taskforce, HLA Working Group, and the Pharmacogenomics Working Group (PGxWG). Coordinator for PharmGKB's submission for FDA recognition of their clinical annotation database, and curator with a focus on PharmGKB Pediatric.

  • Jonathan D Klein

    Jonathan D Klein

    Marron and Mary Elizabeth Kendrick Professor of Pediatrics

    Current Research and Scholarly InterestsMy studies address:
    1. Confidentiality and Access to Care studies of confidential time during well-visits and policy analyses addressing quality of care and health systems capacity for adolescents and young adults in the US and globally; and,
    2, Tobacco, nicotine, and second-hand smoke studies of primary care counseling to reduce nicotine addiction in adolescents and programs to engage medical specialty groups in secondhand smoke clinical and policy interventions.

  • Teri Klein

    Teri Klein

    Professor (Research) of Biomedical Data Science, of Medicine (BMIR) and, by courtesy, of Genetics
    On Partial Leave from 01/16/2026 To 12/18/2026

    Current Research and Scholarly InterestsCo-founder, Pacific Symposium on Biocomputing
    NIEHS, Site Visit Reviewer
    NIH, Study Section Reviewer