Medicine
Showing 821-840 of 1,152 Results
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Orlando Quintero, MD
Clinical Assistant Professor, Medicine - Infectious Diseases
BioDr. Orlando Quintero is a board-certified, fellowship trained internist specializing in the diagnosis and treatment of infectious diseases. He is also clinical assistant professor in the Department of Medicine, Division of Infectious Diseases, at Stanford University School of Medicine.
As a clinician, Dr. Quintero diagnoses and treats infectious diseases in immunocompromised patients. This includes the prevention, diagnosis and treatment of infections in patients who are immunosuppressed because of Solid Organ Transplantation, Bone Marrow (Hematopoeitic Cell) Transplants, Hematologic Malignancies, Chemotherapy for Solid Tumors, HIV who receive Chemotherapy, Solid Organ or Bone Marrow Transplants Immunomodulators for Auto-Immune Diseases and other forms of immunodeficiency.
Dr. Quintero has published on topics including coronavirus in kidney transplant patients, prevention of cytomegalovirus in heart transplant patients, and prevention of urinary tract infections in renal transplant patients. His work has appeared in publications including Transplant Infectious Disease, Emerging Infectious Diseases, and the Journal of Heart and Lung Transplantation.
He has delivered presentations at meetings of organizations including the International Society for Heart and Lung Transplantation, Interscience Conference on Antimicrobial Agents and Chemotherapy, and American Society of Tropical Medicine and Hygiene. Topics of his presentations have included prevention of cytomegalovirus, prevention of recurrent urinary tract infections, Chagas disease in New York City, and more.
Currently, Dr. Quintero is conducting research on treatment of patients with COVID-19, prevention and treatment of invasive fungal infections of the gastrointestinal tract in immunocompromised patients, and the epidemiology of invasive fungal infections in heart transplant recipients.
Among his awards, He has received honors for his teaching and research from Albert Einstein College. He also has earned recognition from the Fred Hutchinson Cancer Research Center and the American Society of Transplantation.
Dr. Quintero’s volunteer community service includes participation in health fairs to promote HIV testing and hypertension control, plus disease management in the Garifuna population in New York – descendants of an Afro-indigenous population from the Caribbean island of St. Vincent.
He is a member of the Infectious Disease Society of American, Infectious Diseases Association of California, American Society of Transplantation, and HIV Medicine Association. -
Ralph Rabkin
Professor of Medicine, Emeritus
Current Research and Scholarly InterestsDr Rabkin is examining the mechanism of the acquired resistance to hormones that develops in kidney failure.In particular he is studying the impact of kidney failure on the action of growth hormone and the role of impaired signal transduction as a cause of growth hormone resistance. He is also engaged in the study of growth factors in diabetic kidney disease.
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Thomas Raffin
The Colleen and Robert Haas Professor in Medicine and Biomedical Ethics, Emeritus
Current Research and Scholarly InterestsDr. Raffin is a clinician, teacher and investigator. He retired as Chief of the Division of Pulmonary and Critical Care Medicine in 2004. His key areas of academic interest include the biology and management of acute lung injury; basic biology of human lung and white cells; and, key issues in biomedical ethics including withholding and withdrawing life support, health care delivery, genomics, genetic screening, and neuroethics.
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Afrin Kamal Rahman MD MS
Clinical Associate Professor, Medicine - Gastroenterology & Hepatology
BioDr. Afrin Kamal Rahman (previously known as Dr. Kamal) is a Clinical Associate Professor of Gastroenterology at Stanford University School of Medicine. Her health services research interests focus on developing and testing communication tools to improve the patient-care provider experience. She has authored 50+ peer reviewed publications and is an NIH funded research. Dr. Rahman is a principal investigator for a K23 grant awarded by the NIDDK to develop and test a mobile health application tool for patients with gastroesophageal reflux disease (GERD).
Dr. Rahman is co-chair of the Young International Society for Diseases of the Esophagus (ISDE) and serves on several committees as part of American College of Gastroenterology and American Foregut Society. She is also an associate editor for Diseases of the Esophagus and director of the Esophageal Virtual Collaborative, an on-line platform with a mission to discuss complex challenging cases in benign esophageal disease among colleagues cross-nation.
PubMed: https://pubmed.ncbi.nlm.nih.gov/?term=kamal%2C+afrin&sort=date
Research website: knowreflux.org -
Sameer Raina, MD, MBBS, MBA, FACC
Clinical Associate Professor, Medicine - Cardiovascular Medicine
BioDr. Raina is a board-certified cardiologist in the General Cardiology clinic at Stanford Health Care and a member of the Stanford Cardiovascular Institute. He is also a clinical associate professor in the Division of Cardiovascular Medicine.
His clinical interests include preventive cardiology, cardiac rehabilitation, and sports cardiology. In his recent positions at West Virginia University, he established the cardiology telemedicine program during and after the COVID pandemic. He applied his passion for cardiac rehab by creating individualized treatment plans for college athletes recovering from COVID. Dr. Raina is also passionate about building relationships with community doctors. He believes continuous communication is an essential part of excellent patient care.
Dr. Raina’s current research focuses on preventive cardiology, cardiac imaging, and outcomes research. He studies the outcomes of different cardiac interventions in specific patient populations. His research helps identify appropriate treatments for patients who have other conditions in addition to heart disease.
Dr. Raina eagerly anticipates joining the faculty of the Stanford South Asian Translational Heart Initiative (SSATHI). He is excited for the opportunity to address the high risk of cardiovascular diseases among South Asians. He looks forward to applying his clinical and research experience to support SSATHI’s mission to provide advanced care to ethnic populations disproportionately affected by these diseases.
Dr. Raina is a peer reviewer for several prestigious publications, including Neuropsychiatric Disease and Treatment and the International Journal of Chronic Obstructive Pulmonary Disease. He has also been an invited guest speaker at national and international meetings, including those for the International Congress of Cardiology and the World Congress of Cardiothoracic-Renal Diseases.
Dr. Raina is a fellow of the American College of Cardiology (FACC) and a member of the American College of Cardiology. -
Rishi Raj
Clinical Professor, Medicine - Pulmonary, Allergy & Critical Care Medicine
BioDr. Rishi Raj is a Clinical Professor of Medicine at Stanford University, where he directs the Interstitial Lung Disease program. He has practiced pulmonary and critical care medicine for over two decades and specializes in the diagnosis and treatment of interstitial lung diseases.
His primary clinical interest encompasses a range of interstitial lung diseases, including idiopathic pulmonary fibrosis, other idiopathic interstitial lung diseases, drug-induced interstitial lung diseases, interstitial lung disease associated with connective tissue diseases such as scleroderma, rheumatoid arthritis, dermatomyositis, sarcoidosis, hypersensitivity pneumonitis, and other various interstitial lung diseases. His other clinical interest is acute respiratory failure associated with interstitial lung diseases, and Dr. Raj attends regularly in the medical intensive care units.
He is a principal investigator and co-investigator in numerous clinical trials, examining new therapies for treating idiopathic pulmonary fibrosis and other interstitial lung diseases.
Dr. Raj's current research focuses on the use of radiologic biomarkers to predict outcomes in various interstitial lung diseases, and leveraging large language models in clinical research. -
Shriti Raj
Assistant Professor of Medicine (Center for Biomedical Informatics Research)
BioShriti is an Assistant Research Professor in Stanford’s Center for Biomedical Informatics Research and a Junior Faculty Fellow at the Institute for Human-Centered AI. Her research focuses on developing and evaluating human-centered decision-support techniques to help patients and clinicians make health data and algorithms actionable. She is particularly interested in creating tools to support the use of wearable health data and studying their impact on chronic condition management.
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Kavitha Ramchandran
Clinical Professor, Medicine - Oncology
Current Research and Scholarly InterestsMy research focuses on innovative models of care delivey to understand how to integrate primary and specialist palliative care. We also do work in palliative care education and how to scale our education to be impactful and sustainable. We are evaluating online models.
In cancer care I do research on novel therapeutics in thoracic malignancies including immunotherapy, new targeted agents, and new sequencing of approved drugs. -
Meghan Ramsey
Clinical Associate Professor, Medicine - Pulmonary, Allergy & Critical Care Medicine
BioDr. Meghan Ramsey is a Clinical Associate Professor in the Division of Pulmonary, Allergy, and Critical Care Medicine. She received her undergraduate degree from Lafayette College in Pennsylvania with a major in Neuroscience. She then attended Stanford University for medical school where she stayed to complete her internal medicine residency, and pulmonary/critical care fellowship. Her clinical time is split between the inpatient setting in the medical ICU and the ambulatory setting in Interventional Pulmonology with a focus on thoracic malignancies. Outside of her clinical time she has a dedicated commitment to teaching, serving as a mentor for residents and fellows, as well as leading as a co-director the pulmonary physiology course for medical students.
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Julia D. Ransohoff
Instructor, Medicine - Oncology
BioDr. Ransohoff received her B.A. from Harvard College in Human Developmental and Regenerative Biology and completed her medical training at Stanford University, where she received her M.D., completed residency in internal medicine, and fellowship training in hematology and oncology as part of the American Board of Internal Medicine Physician Scientist Training Program.
Dr. Ransohoff is a physician-scientist dedicated to improving breast cancer treatments and outcomes through developing genomic methods to profile how tumors respond to treatment. Her research focuses on molecular approaches to understand the variable clinical responses of breast cancers to treatment at the genomic level by profiling molecular residual disease. Her current work involves exploring mechanisms of chemoresistance and immune evasion and identifying novel therapeutic targets. In related work, she also studies epidemiological risk factors for breast cancer mortality with a focus on the gut microbiome, oncofertility, and racial and ethnic differences in treatment response. Dr. Ransohoff's research has been supported by the ASCO Conquer Cancer Foundation, the Terri Brodeur Breast Cancer Foundation, the Stanford Cancer Institute, ECOG-ACRIN, and the Chan Zuckerberg Initiative.
As an Instructor in the Division of Medical Oncology, Dr. Ransohoff is also a clinically active oncologist, treating patients with breast cancer. -
Vishnu Ravi
Clinical Assistant Professor, Medicine - Primary Care and Population Health
BioDr. Vishnu Ravi combines his expertise as a board-certified, practicing internal medicine physician, senior software engineer, and board-certified clinical informaticist to create transformative solutions for healthcare.
As the Technology Architect for Stanford Medicine Catalyst, the Stanford School of Medicine's flagship innovation program, he designs, develops, and implements innovations including AI-driven platforms for Parkinson's care, chronic cardiovascular disease management, and precision pharmacogenomics that are helping patients receive more personalized and effective care.
At the Stanford Mussallem Center for Biodesign, Vishnu helps lead the center's digital health initiatives spanning education, research, and translation. To support this work, he co-founded Stanford Spezi, an open-source framework and ecosystem for building modular, standards-based digital health solutions that is now used by leading healthcare institutions and companies worldwide.
Vishnu also instructs Stanford's CS342/MED253 Building for Digital Health, an innovative course that brings together computer science, engineering, and medical students with clinical faculty to develop real-world healthcare applications. In 2025, he helped lead the international expansion of this program, with a successful launch at Chalmers University of Technology and University of Gothenburg in Sweden. He is also deeply involved in the effort to weave AI into the medical school curriculum at Stanford.
Vishnu's entrepreneurial experience includes co-founding a TechStars-backed startup and developing COVID-19 solutions deployed internationally. He has pioneered clinical AI applications, creating conversational agents and advanced analytics for unstructured health data, while contributing to international mobile health data standards. He serves as a technical consultant to companies including Google and speaks regularly at industry conferences.
Alongside his technology work, Vishnu maintains his connection to clinical practice as an Internal Medicine physician providing comprehensive primary care to a diverse patient population at Stanford Health Care. -
Risheen Reejhsinghani
Clinical Associate Professor, Medicine - Cardiovascular Medicine
BioRisheen Reejhsinghani obtained her medical degree in Mumbai, India, followed by an internal medicine residency at St. Elizabeth's Medical Center in Boston, MA and cardiology fellowship at Baystate Medical Center/Tufts University School of Medicine, where she served as one of the chief fellows. She subsequently completed an advanced echocardiography fellowship at the University of California, San Francisco, and is board certified in echocardiography, general cardiology, and nuclear cardiology.
Dr. Reejhsinghani practices as a general cardiologist in the Division of Cardiovascular Medicine at Stanford University School of Medicine, where she also serves as the associate director for the hospital-based consultative cardiology service. As a clinical cardiologist, she believes strongly in the tenets of evidence-based practice, diagnostic cognizance, and patient education. She also has a specific interest in the burgeoning field of Cardio-Rheumatology, focused on cardiac diseases among patients with rheumatologic conditions such as rheumatoid arthritis, systemic lupus erythematosus, scleroderma, and ankylosing spondylitis, among others. Her clinical research in this area has focused on the evaluation of structural cardiac disease and diastolic dysfunction in ankylosing spondylitis patients, primarily using echocardiography.
Dr. Reejhsinghani has an academic focus in medical education, and believes that instilling a love for bedside medicine and the physical exam is the soundest way to empower future generations of learners. To this end, she received additional training in clinical teaching and simulation at the University of California, San Francisco, and has worked extensively on curriculum and course design. She currently serves as the associate program director of the cardiovascular medicine fellowship at Stanford, and is an associate course director for the Year 1 Practice of Medicine Course at the Stanford University medical school. Dr. Reejhsinghani also enjoys writing, particularly about medical education and has written articles for international newspapers, among other publications. -
David Rehkopf
Professor of Epidemiology and Population Health, of Sociology, of Medicine (Primary Care and Population Health) and, by courtesy, of Pediatrics, and of Health Policy
BioI am a social epidemiologist and serve as a Professor in the Department of Epidemiology and Population Health and in the Department of Medicine in the Division of Primary Care and Population Health. I joined the faculty at Stanford School of Medicine in 2011.
I am Director of the Stanford Center for Population Health Sciences. In this position, I am committed to making high-value data resources available to researchers across disciplines in order to better enable them to answer their most pressing clinical and population health questions.
My own research is focused on understanding the health implications of the myriad decisions that are made by corporations and governments every day - decisions that profoundly shape the social and economic worlds in which we live and work. While these changes are often invisible to us on a daily basis, these seemingly minor actions and decisions form structural nudges that can create better or worse health at a population level. My work demonstrates the health implications of corporate and governmental decisions that can give the public and policy makers evidence to support new strategies for promoting health and well-being. In all of his work, I have a focus on the implications of these exposures for health inequalities.
Since often policy and programmatic changes can take decades to influence health, my work also includes more basic research in understanding biological signals that may act as early warning signs of systemic disease, in particular accelerated aging. I examine how social and economic policy changes influence a range of early markers of disease and aging, with a particular recent focus on DNA methylation. I am supported by several grants from the National Institute on Aging and the National Institute on Minority Health and Health Disparities to develop new more sensitive ways to understand the health implications of social and economic policy changes. -
David A. Relman
Thomas C. and Joan M. Merigan Professor and Professor of Microbiology and Immunology
Current Research and Scholarly InterestsMy investigative program focuses on human-microbe interactions and human microbial ecology, and primarily concerns the ecology of human indigenous microbial communities; a secondary interest concerns the classification of humans with systemic infectious diseases, based on features of genome-wide gene transcript abundance patterns and pther aspects of the host response.
