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  1. People
  2. Oanh Nguyen, MD, MAS
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Oanh Nguyen, MD, MAS

Associate Professor In Residence and Division Chief

I am a hospital medicine physician, health services researcher, and Division Chief of Hospital Medicine at Zuckerberg San Francisco General Hospital. Throughout my career, I have been interested in one fundamental question:

How can we build healthcare organizations where every patient receives excellent care, not by chance, but by design?

Every patient deserves excellent care, but delivering it consistently depends on more than excellent clinicians. It also depends on the organizations in which they work. The systems, teams, culture, and learning environments surrounding clinicians profoundly shape the care they are able to deliver. Understanding how healthcare organizations create those conditions has become the central focus of my work.

Public institutions and academic safety-net hospitals have shaped that perspective throughout my career. From my residency and early faculty years at UT Southwestern and Parkland Hospital in Dallas to my faculty career at UCSF and Zuckerberg San Francisco General Hospital, I have seen both the extraordinary possibilities and the persistent shortcomings of the systems we rely on to care for our communities. Those experiences convinced me that improving healthcare requires more than generating new evidence. It requires understanding how organizations create the conditions that make excellent care possible.

Research alone cannot fully inform this understanding. To answer these questions, I draw on both research and leadership, which gives me an internal perspective of organizational culture, incentives, relationships, and daily decisions. Serving as Division Chief gives me the opportunity to observe organizational change from within, while research provides the tools to study those observations systematically and share lessons beyond a single institution. Together, these perspectives allow me to better understand how healthcare organizations learn, adapt, and create the conditions for clinical excellence.

My research examines how healthcare organizations translate evidence into routine practice, redesign care for medically and socially complex populations, and develop learning health systems capable of continuous improvement. Across clinical care, healthcare delivery, and health policy, my work is united by a common goal: understanding how healthcare organizations create the conditions that allow clinical excellence to flourish for every patient.

I believe safety-net hospitals are uniquely positioned to advance this work. Caring for patients with the greatest complexity while operating under the greatest constraints forces these organizations to continually innovate and adapt. The lessons learned in these settings have the potential to strengthen healthcare systems far beyond the safety net.

My research has been supported by the National Institutes of Health, the Agency for Healthcare Research and Quality, the California Health Care Foundation, and the Chan Zuckerberg Biohub.
Education
BS, - Neuroscience & political science, University of California, Los Angeles
MD, - , University of California, San Diego
MAS, - Clinical Research with Specialization in Implementation Science, University of California, San Francisco
- Internship & Residency in Internal Medicine, University of Texas Southwestern Medical Center; Parkland Health & Hospital System
Websites
  • Posts by OanhKieuNguyen
Publications
  1. Hidden
    JAMA

    Makam AN, Dhaliwal G, Nguyen OK. Complexity of Diagnosing Volume Overload. JAMA 2026. PMID: 42377953


  2. Hidden
    Harm reduction journal

    Suen LW, Fraimow-Wong L, Baisey T, Knight KR, Thomas L, Giuliano R, Nguyen OK, Martín M. Implementation and sustainability of hospital-based harm reduction delivery: a qualitative analysis. Harm reduction journal 2026. PMID: 42231381


  3. Hidden
    Journal of the American Medical Informatics Association : JAMIA

    Tieu L, Lyles CR, Kim HC, Luna I, Wong J, Lopez-Solano N, Li J, Yang A, Rodriguez JA, Nguyen OK, Casillas A, De Marchis EH, Stewart AL, Neilands TB, Khoong EC. A self-report measure of digital skills needed to use digital health tools among older adults-the Skills Measurement and Readiness Training for Digital Health (SMART Digital Health) Scale. Journal of the American Medical Informatics Association : JAMIA 2025. PMID: 40971609


  4. Hidden
    JAMA internal medicine

    Ayoola A, Ohringer A, Nguyen OK. Tolerance of Guideline-Directed Medical Therapy-Reply. JAMA internal medicine 2025. PMID: 40163082


  5. Hidden
    Annals of internal medicine

    Makam AN, Bailey L, Anderson N, Bellitti K, Skinner S, Nguyen OK. Availability of Cardioprotective Medications for Type 2 Diabetes in the Medicaid Program. Annals of internal medicine 2025. PMID: 40258281


  6. Hidden
    Journal of general internal medicine

    Martin M, Baisey T, Skinner S, Ly L, Slown K, Harter K, Nguyen OK, Steiger S, Suen LW. Early Results of Implementing Rapid Methadone Titration for Hospitalized Patients: A Case Series. Journal of general internal medicine 2025. PMID: 39804553


  7. Hidden
    Journal of general internal medicine

    Steiner G, Suen LW, Martin M, Skinner S, Crouch P, Nguyen OK, Slown K, Logan A. Treatment of Inpatient Opioid Withdrawal with Short-Acting Full Agonist Opioids at a Safety-Net Hospital. Journal of general internal medicine 2025. PMID: 39762677


  8. Hidden
    Journal of general internal medicine

    Bepo L, Nguyen OK, Makam AN. Disparities in Use of Novel Diabetes Medications by Insurance: A Nationally Representative Cohort Study. Journal of general internal medicine 2024. PMID: 39085578


  9. Hidden
    Frontiers in digital health

    Bell J, Gottlieb LM, Lyles CR, Nguyen OK, Ackerman SL, De Marchis EH. Provision of digital devices and internet connectivity to improve synchronous telemedicine access in the U.S.: a systematic scoping review. Frontiers in digital health 2024. PMID: 39135634


  10. Hidden
    Frontiers in public health

    Hernandez AM, Khoong EC, Kanwar N, Lopez-Solano N, Rodriguez JA, De Marchis E, Nguyen OK, Casillas A. Lessons learned from a multi-site collaborative working toward a digital health use screening tool. Frontiers in public health 2024. PMID: 39040864


  11. Hidden
    JAMA network open

    Jain S, Gan S, Nguyen OK, Sudore RL, Steinman MA, Covinsky K, Makam AN. Survival, Function, and Cognition After Hospitalization in Long-Term Acute Care Hospitals. JAMA network open 2024. PMID: 38805226


  12. Hidden
    Critical care medicine

    Makam AN, Burnfield J, Prettyman E, Nguyen OK, Wu N, Espejo E, Blat C, Boscardin WJ, Ely EW, Jackson JC, Covinsky KE, Votto J, Recovery After Transfer to an LTACH for COVID-19 (RAFT COVID) Study. One-Year Recovery Among Survivors of Prolonged Severe COVID-19: A National Multicenter Cohort. Critical care medicine 2024. PMID: 38597793


  13. Hidden
    Journal of hospital medicine

    Narayan A, Hong AS, Nguyen OK. Policy in clinical practice: Impact of restoring the 1999 public charge rule on healthcare access for noncitizen immigrants. Journal of hospital medicine 2024. PMID: 38358059


  14. Hidden
    JAMA network open

    Fraimow-Wong L, Martín M, Thomas L, Giuliano R, Nguyen OK, Knight K, Suen LW. Patient and Staff Perspectives on the Impacts and Challenges of Hospital-Based Harm Reduction. JAMA network open 2024. PMID: 38386317


  15. Hidden
    JAMA network open

    Nouri S, Lyles CR, Sherwin EB, Kuznia M, Rubinsky AD, Kemper KE, Nguyen OK, Sarkar U, Schillinger D, Khoong EC. Visit and Between-Visit Interaction Frequency Before and After COVID-19 Telehealth Implementation. JAMA network open 2023. PMID: 37713198


  16. Hidden
    Journal of hospital medicine

    Haber LA, Nguyen OK, Taub J, Martin M. Policy in clinical practice: Elimination of the buprenorphine "X-waiver". Journal of hospital medicine 2023. PMID: 37545111


  17. Hidden
    Journal of hospital medicine

    Rosenthal MA, Ranji SR, Kanzaria HK, Ortiz GM, Chase J, Chodos AH, Nguyen OK, Rodriguez EG, Makam AN. Characterizing patients hospitalized without an acute care indication: A retrospective cohort study. Journal of hospital medicine 2023. PMID: 36757173


  18. Hidden
    Annual review of public health

    Lyles CR, Nguyen OK, Khoong EC, Aguilera A, Sarkar U. Multilevel Determinants of Digital Health Equity: A Literature Synthesis to Advance the Field. Annual review of public health 2022. PMID: 36525960


  19. Hidden
    "Are Telehealth Visits Feasible for Vulnerable Patients?"

    Martin M, Clement J, Defries T, Makam AN, Nguyen OK. Prevalence and Characteristics of Hospitalizations with Unhealthy Alcohol Use in a Safety-Net Hospital from 2016 to 2018. "Are Telehealth Visits Feasible for Vulnerable Patients?" 2022. PMID: 35060005


  20. Hidden
    "Are Telehealth Visits Feasible for Vulnerable Patients?"

    Bepo L, Makam AN, Nguyen OK. Sodium-Glucose Cotransporter-2 Inhibitors Versus Glucagon-like Peptide-1 Receptor Agonists and the Risk for Cardiovascular Outcomes in Routine Care Patients With Diabetes Across Categories of Cardiovascular Disease. "Are Telehealth Visits Feasible for Vulnerable Patients?" 2022. PMID: 35038403


  21. Hidden
    "Are Telehealth Visits Feasible for Vulnerable Patients?"

    Sterling MR, Ringel JB, Pinheiro LC, Safford MM, Levitan EB, Phillips E, Brown TM, Nguyen OK, Goyal P. Social Determinants of Health and 30-Day Readmissions Among Adults Hospitalized for Heart Failure in the REGARDS Study. "Are Telehealth Visits Feasible for Vulnerable Patients?" 2021. PMID: 34865525


  22. Hidden
    Journal of general internal medicine

    Suen LW, Makam AN, Snyder HR, Repplinger D, Kushel MB, Martin M, Nguyen OK. National Prevalence of Alcohol and Other Substance Use Disorders Among Emergency Department Visits and Hospitalizations: NHAMCS 2014-2018. Journal of general internal medicine 2021. PMID: 34518978


  23. Hidden
    Journal of general internal medicine

    Wray CM, Tang J, Shah S, Nguyen OK, Keyhani S. Sociodemographics, Social Vulnerabilities, and Health Factors Associated with Telemedicine Unreadiness Among US Adults. Journal of general internal medicine 2021. PMID: 34331214


  24. Hidden
    Southern medical journal

    Sekar DR, Siropaides CH, Smith LN, Nguyen OK. Adapting Existing Resources for Serious Illness Communication Skills Training for Internal Medicine Residents. Southern medical journal 2021. PMID: 33942112


  25. Hidden
    Journal of general internal medicine

    Nguyen OK, Washington C, Clark CR, Miller ME, Patel VA, Halm EA, Makam AN. Man vs. Machine: Comparing Physician vs. Electronic Health Record-Based Model Predictions for 30-Day Hospital Readmissions. Journal of general internal medicine 2021. PMID: 33443694


  26. Hidden
    BMJ open quality

    Martin M, Snyder HR, Coffa D, Steiger S, Clement JP, Ranji SR, Azari S, Nguyen OK, Lum PJ. Time to ACT: launching an Addiction Care Team (ACT) in an urban safety-net health system. BMJ open quality 2021. PMID: 33500326


  27. Hidden
    BMC health services research

    Makam AN, Nguyen OK, Miller ME, Shah SJ, Kapinos KA, Halm EA. Comparative effectiveness of long-term acute care hospital versus skilled nursing facility transfer. BMC health services research 2020. PMID: 33176767


  28. Hidden
    BMC medical informatics and decision making

    Saleh SN, Makam AN, Halm EA, Nguyen OK. Can we predict early 7-day readmissions using a standard 30-day hospital readmission risk prediction model? BMC medical informatics and decision making 2020. PMID: 32933505


  29. Hidden
    Journal of the American Geriatrics Society

    Makam AN, Nguyen OK, Halm EA. REPLY TO COMMENT ON: THE CLINICAL COURSE AFTER LONG-TERM ACUTE CARE HOSPITAL ADMISSION AMONG OLDER MEDICARE BENEFICIARIES. Journal of the American Geriatrics Society 2020. PMID: 31903543


  30. Hidden
    Journal of the American Geriatrics Society

    Makam AN, Tran T, Miller ME, Xuan L, Nguyen OK, Halm EA. The Clinical Course after Long-Term Acute Care Hospital Admission among Older Medicare Beneficiaries. Journal of the American Geriatrics Society 2019. PMID: 31449686


  31. Hidden
    JAMA internal medicine

    Schumacher RC, Nguyen OK, Makam AN. Evidence-Based Medicine and the American Thoracic Society Guidelines-Reply. JAMA internal medicine 2019. PMID: 31260021


  32. Hidden
    Journal of hospital medicine

    Keshvani N, Berger K, Gupta A, DePaola S, Nguyen OK, Makam AN. Improving Respiratory Rate Accuracy in the Hospital: A Quality Improvement Initiative. Journal of hospital medicine 2019. PMID: 31251168


  33. Hidden
    JAMA internal medicine

    Nguyen OK, Makam AN. Comparison of Scheduled vs Emergency-Only Dialysis in Undocumented Immigrants With End-stage Renal Disease-Reply. JAMA internal medicine 2019. PMID: 31058944


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