School of Medicine


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  • Ashley Martinez, MD, MAS

    Ashley Martinez, MD, MAS

    Clinical Assistant Professor, Medicine - Nephrology

    BioDr. Ashley Martinez is a board-certified, fellowship-trained nephrologist with the Kidney and Pancreas Transplant Program at Stanford Health Care. She is also a clinical assistant professor in the Department of Medicine, Division of Nephrology at Stanford University School of Medicine.

    Dr. Martinez specializes in caring for kidney transplant recipients. She has expertise in pre-transplant evaluation and readiness, immunosuppression, kidney allograft survival, and the prevention and treatment of post-transplant complications. She prioritizes clear, personalized communication at every point to improve care.

    Dr. Martinez earned her medical degree from Harvard Medical School and completed her residency in internal medicine at Massachusetts General Hospital. She completed clinical and research fellowships in nephrology at the University of California, San Francisco (UCSF), where she also earned a master’s degree in clinical research. She completed her transplant nephrology fellowship at Stanford University School of Medicine.

    Dr. Martinez’s research interests focus on addressing the needs of patients impacted by language barriers. Her work has emphasized the need to improve provider-patient communication, patient education, and evaluation tools for patients with limited English proficiency. She aims to increase awareness of communication gaps and increase patient-centered communication throughout the course of kidney care.

    Dr. Martinez has published her findings in peer-reviewed journals including JAMA Network Open and Kidney360. She has also presented at the National Kidney Foundation Spring Clinical Meetings.

    Dr. Martinez is a member of the American Society of Nephrology, the American Society of Transplantation, and the National Kidney Foundation.

  • Nicole Martinez-Martin

    Nicole Martinez-Martin

    Assistant Professor (Research) of Pediatrics (Biomedical Ethics) and, by courtesy, of Psychiatry and Behavioral Sciences (Child and Adolescent Psychiatry and Child Development)

    Current Research and Scholarly InterestsNIH/National Institute of Mental Health
    K01 MH118375-01A1
    “Ethical, Legal and Social Implications in the Use of Digital Technology for Mental Health Applications”

    Greenwall Foundation Making a Difference in Bioethics Grant
    “Ethical, Legal and Social Implications of Digital Phenotyping”

  • Nicole M. Martinez

    Nicole M. Martinez

    Assistant Professor of Chemical and Systems Biology and of Developmental Biology

    Current Research and Scholarly InterestsThe Martinez lab studies RNA regulatory mechanisms that control gene expression. We focus on mRNA processing, RNA modifications and their roles in development and disease.

  • Olivia Martinez

    Olivia Martinez

    Johnson and Johnson Professor of Surgery

    Current Research and Scholarly InterestsHost-Pathogen interactions; EBV B cell lymphomas; pathways of immune evasion in the growth and survival of EBV B cell lymphomas; mechanisms of graft rejection and tolerance induction; stem cell and solid organ transplantation.

  • Daphne O. Martschenko

    Daphne O. Martschenko

    Assistant Professor (Research) of Pediatrics (Stanford Center for Biomedical Ethics)

    BioDr. Daphne Oluwaseun Martschenko is an Assistant Professor at the Stanford Center for Biomedical Ethics. Her scholarship identifies novel ways to examine and enhance the ethical and socially responsible conduct, translation, and interpretation of human genetic research.

    Dr. Martschenko is passionate about fostering public and community engagement with controversial scientific research. She has appeared in the New York Times and on numerous podcasts including Freakonomics Radio. Dr. Martschenko’s work is published in publicly accessible media outlets such as Scientific American and The Conversation. In 2023, she was named one of 10 Scientists to Watch by ScienceNews.

    Currently, Dr. Martschenko is writing a book with her friend and colleague Sam Trejo, a quantitative social scientist interested in how social and biological factors jointly shape human development across the life-course. In it, they unpack various social, ethical, and policy issues related to the DNA revolution.

  • Eric Marxmiller

    Eric Marxmiller

    Advanced Lecturer, Emergency Medicine

    BioI'm Eric Marxmiller, a registered paramedic and Advance Lecturer in the Department of Emergency Medicine, where I also serve as Program Director for Stanford EMS (StEMS) and numerous EMS education classes. I hold paramedic registrations in both the United States and the United Kingdom through the Health and Care Professions Council (HCPC), and maintain active clinical practice in San Francisco's 911 system.

    My career spans over two decades in emergency medicine, from my start as an EMT in 2001 through paramedic certification in 2014, with experience ranging from 911 response and interfacility transport to expedition and event medicine across seven continents. I frequently work as a consultant in executive protection and event medical services on a global basis. As founder of multiple medical service organizations, I've combined frontline clinical work with education and innovation in EMS, contributing to the field through teaching, program development, and entrepreneurial ventures focused on advancing prehospital care.