Oanh Nguyen, MD, MAS

Assoc Professor In Residence
Medicine

Dr. Nguyen is a physician-health services researcher with expertise in epidemiology and implementation science. Her research portfolio focuses on understanding how social and structural determinants of health affect care delivery and outcomes for people from underserved and historically marginalized communities, and on how to overcome these factors through interventions embedded in healthcare systems and/or health care policy.

As a practicing hospital medicine physician and a safety-net hospitalist researcher, she has studied these issues primarily through the lens of hospitalization and hospital readmissions in safety-net settings. Spending on hospital care accounts for 31% of ~$1.3 trillion of annual U.S. health care spending. Reducing 30-day hospital readmissions is a priority because hospitals are financially penalized and because readmissions are frequent (occurring in 1 of 5 hospitalized patients), costly, and expose patients to increased potential harms of hospitalization including adverse drug events, hospital-acquired disability, and increased mortality. Over the past decade, there has been increasing recognition that frequent readmissions may also be a marker for increased clinical severity and social risk factors in certain populations, particularly those who receive care in safety-net settings. Her work to date has focused on understanding the influence of social determinants of health and social risk factors on readmissions and post-hospital recovery, and on developing potential interventions to address these needs to optimize post-hospital recovery.

Dr. Nguyen holds affiliations in the UCSF Center for Vulnerable Populations, Benioff Homelessness and Housing Initiative, Social Interventions Research and Evaluation Network, Institute for Health Policy Studies, and PRISE Center. Her work is supported by the National Heart, Lung, and Blood Institute, the California Health Care Foundation. She has been recognized locally and nationally for her research, receiving the ZSFG Outstanding Junior Investigator Award in 2019 and the Society of Hospital Medicine Junior Investigator Award in 2019). She currently serves as the UCSF PRISE Center Program Director for Hospital Care, was formerly a deputy editor at the Journal of General Internal Medicine, and currently serves as deputy editor for the Journal of Hospital Medicine. In 2022, she was named a Chan Zuckerberg Biohub Investigator, an independent nonprofit research initiative that empowers scientists to pursue high-risk and innovative scientific research. 

Publications: 

Early Results of Implementing Rapid Methadone Titration for Hospitalized Patients: A Case Series.

Journal of general internal medicine

Martin M, Baisey T, Skinner S, Ly L, Slown K, Harter K, Nguyen OK, Steiger S, Suen LW

Guideline-Directed Medical Therapy Intolerance in Heart Failure.

JAMA internal medicine

Ayoola A, Ohringer A, Nguyen OK

A genome assembly for the Chryxus Arctic (Oeneis chryxus), the highest butterfly in North America.

The Journal of heredity

MacDonald ZG, Schoville S, Escalona M, Marimuthu MPA, Nguyen O, Chumchim N, Fairbairn CW, Seligmann W, Toffelmier E, Gillespie T, Shaffer HB

A genome assembly of the American black bear, Ursus americanus, from California.

The Journal of heredity

Supple MA, Escalona M, Adkins J, Buchalski MR, Alexandre N, Sahasrabudhe RM, Nguyen O, Sacco S, Fairbairn C, Beraut E, Seligmann W, Green RE, Meredith E, Shapiro B

Provision of digital devices and internet connectivity to improve synchronous telemedicine access in the U.S.: a systematic scoping review.

Frontiers in digital health

Bell J, Gottlieb LM, Lyles CR, Nguyen OK, Ackerman SL, De Marchis EH

Lessons learned from a multi-site collaborative working toward a digital health use screening tool.

Frontiers in public health

Hernandez AM, Khoong EC, Kanwar N, Lopez-Solano N, Rodriguez JA, De Marchis E, Nguyen OK, Casillas A

A highly contiguous genome assembly for the Yellow Warbler (Setophaga petechia).

The Journal of heredity

Tsai WLE, Escalona M, Garrett KL, Terrill RS, Sahasrabudhe R, Nguyen O, Beraut E, Seligmann W, Fairbairn CW, Harrigan RJ, McCormack JE, Alfaro ME, Smith TB, Bay RA

Survival, Function, and Cognition After Hospitalization in Long-Term Acute Care Hospitals.

JAMA network open

Jain S, Gan S, Nguyen OK, Sudore RL, Steinman MA, Covinsky K, Makam AN

One-Year Recovery Among Survivors of Prolonged Severe COVID-19: A National Multicenter Cohort.

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

Reference genome of Townsend's big-eared bat, Corynorhinus townsendii.

The Journal of heredity

Capel SLR, Hamilton NM, Fraser D, Escalona M, Nguyen O, Sacco S, Sahasrabudhe R, Seligmann W, Vazquez JM, Sudmant PH, Morrison ML, Wayne RK, Buchalski MR

The genome assembly of Island Oak (Quercus tomentella), a relictual island tree species.

The Journal of heredity

Mead A, Fitz-Gibbon ST, Escalona M, Beraut E, Sacco S, Marimuthu MPA, Nguyen O, Sork VL

Patient and Staff Perspectives on the Impacts and Challenges of Hospital-Based Harm Reduction.

JAMA network open

Fraimow-Wong L, Martín M, Thomas L, Giuliano R, Nguyen OK, Knight K, Suen LW

A genome assembly of the Yuma myotis bat, Myotis yumanensis.

The Journal of heredity

Curti JN, Fraser D, Escalona M, Fairbairn CW, Sacco S, Sahasrabudhe R, Nguyen O, Seligmann W, Sudmant PH, Toffelmier E, Vazquez JM, Wayne R, Shaffer HB, Buchalski MR

A highly contiguous genome assembly for the pocket mouse Perognathus longimembris longimembris.

The Journal of heredity

Kozak KM, Escalona M, Chumchim N, Fairbairn C, Marimuthu MPA, Nguyen O, Sahasrabudhe R, Seligmann W, Conroy C, Patton JL, Bowie RCK, Nachman MW

A genome assembly for the southern Pacific rattlesnake, Crotalus oreganus helleri, in the western rattlesnake species complex.

The Journal of heredity

Westeen EP, Escalona M, Holding ML, Beraut E, Fairbairn C, Marimuthu MPA, Nguyen O, Perri R, Fisher RN, Toffelmier E, Shaffer HB, Wang IJ

A reference genome assembly for the continentally distributed ring-necked snake, Diadophis punctatus.

The Journal of heredity

Westeen EP, Escalona M, Beraut E, Marimuthu MPA, Nguyen O, Fisher RN, Toffelmier E, Shaffer HB, Wang IJ

The reference genome assembly of the bright cobblestone lichen, Acarospora socialis.

The Journal of heredity

Adams JN, Escalona M, Marimuthu MPA, Fairbairn CW, Beraut E, Seligmann W, Nguyen O, Chumchim N, Stajich JE

Visit and Between-Visit Interaction Frequency Before and After COVID-19 Telehealth Implementation.

JAMA network open

Nouri S, Lyles CR, Sherwin EB, Kuznia M, Rubinsky AD, Kemper KE, Nguyen OK, Sarkar U, Schillinger D, Khoong EC

Assembly of the largest squamate reference genome to date: the western fence lizard, Sceloporus occidentalis.

The Journal of heredity

Bishop AP, Westeen EP, Yuan ML, Escalona M, Beraut E, Fairbairn C, Marimuthu MPA, Nguyen O, Chumchim N, Toffelmier E, Fisher RN, Shaffer HB, Wang IJ

Chromosome-level reference genome of stinkwort, Dittrichia graveolens (L.) Greuter: A resource for studies on invasion, range expansion, and evolutionary adaptation under global change.

The Journal of heredity

McEvoy SL, Lustenhouwer N, Melen MK, Nguyen O, Marimuthu MPA, Chumchim N, Beraut E, Parker IM, Meyer RS

Reference genome of California walnut, Juglans californica, and resemblance with other genomes in the order Fagales.

The Journal of heredity

Fitz-Gibbon S, Mead A, O'Donnell S, Li ZZ, Escalona M, Beraut E, Sacco S, Marimuthu MPA, Nguyen O, Sork VL

Policy in clinical practice: Elimination of the buprenorphine "X-waiver".

Journal of hospital medicine

Haber LA, Nguyen OK, Taub J, Martin M

Reference genome of the Virginia rail, Rallus limicola.

The Journal of heredity

Hall LA, Wang IJ, Escalona M, Beraut E, Sacco S, Sahasrabudhe R, Nguyen O, Toffelmier E, Shaffer HB, Beissinger SR

Reference genome of the black rail, Laterallus jamaicensis.

The Journal of heredity

Hall LA, Wang IJ, Escalona M, Beraut E, Sacco S, Sahasrabudhe R, Nguyen O, Toffelmier E, Shaffer HB, Beissinger SR

Reference genome of the long-jawed orb-weaver, Tetragnatha versicolor (Araneae: Tetragnathidae).

The Journal of heredity

Adams SA, Graham NR, Holmquist AJ, Sheffer MM, Steigerwald EC, Sahasrabudhe R, Nguyen O, Beraut E, Fairbairn C, Sacco S, Seligmann W, Escalona M, Shaffer HB, Toffelmier E, Gillespie RG

A reference genome assembly of the declining tricolored blackbird, Agelaius tricolor.

The Journal of heredity

Ballare KM, Escalona M, Barr K, Seligmann W, Sacco S, Sahasrabudhe RM, Nguyen O, Wyckoff C, Smith TB, Shapiro B

Reference genome of the Monkeyface Prickleback, Cebidichthys violaceus.

The Journal of heredity

Wright DB, Escalona M, Marimuthu MPA, Sahasrabudhe R, Nguyen O, Sacco S, Beraut E, Toffelmier E, Miller C, Shaffer HB, Bernardi G, German DP

Reference genome of the Woolly Sculpin, Clinocottus analis.

The Journal of heredity

Wright DB, Escalona M, Marimuthu MPA, Sahasrabudhe R, Nguyen O, Sacco S, Beraut E, Toffelmier E, Miller C, Shaffer HB, Bernardi G

Characterizing patients hospitalized without an acute care indication: A retrospective cohort study.

Journal of hospital medicine

Rosenthal MA, Ranji SR, Kanzaria HK, Ortiz GM, Chase J, Chodos AH, Nguyen OK, Rodriguez EG, Makam AN

Multilevel Determinants of Digital Health Equity: A Literature Synthesis to Advance the Field.

Annual review of public health

Lyles CR, Nguyen OK, Khoong EC, Aguilera A, Sarkar U

A chromosome-level reference genome for the giant pink sea star, Pisaster brevispinus, a species severely impacted by wasting.

The Journal of heredity

DeBiasse MB, Schiebelhut LM, Escalona M, Beraut E, Fairbairn C, Marimuthu MPA, Nguyen O, Sahasrabudhe R, Dawson MN

Reference genome for the California ribbed mussel, Mytilus californianus, an ecosystem engineer.

The Journal of heredity

Paggeot LX, DeBiasse MB, Escalona M, Fairbairn C, Marimuthu MPA, Nguyen O, Sahasrabudhe R, Dawson MN

Reference genome of the color polymorphic desert annual plant sandblossoms, Linanthus parryae.

The Journal of heredity

Anghel IG, Jacobs SJ, Escalona M, Marimuthu MPA, Fairbairn CW, Beraut E, Nguyen O, Toffelmier E, Shaffer HB, Zapata F

Prevalence and Characteristics of Hospitalizations with Unhealthy Alcohol Use in a Safety-Net Hospital from 2016 to 2018.

Journal of general internal medicine

Martin M, Clement J, Defries T, Makam AN, Nguyen OK

Social Determinants of Health and 30-Day Readmissions Among Adults Hospitalized for Heart Failure in the REGARDS Study.

Circulation. Heart failure

Sterling MR, Ringel JB, Pinheiro LC, Safford MM, Levitan EB, Phillips E, Brown TM, Nguyen OK, Goyal P

National Prevalence of Alcohol and Other Substance Use Disorders Among Emergency Department Visits and Hospitalizations: NHAMCS 2014-2018.

Journal of general internal medicine

Suen LW, Makam AN, Snyder HR, Repplinger D, Kushel MB, Martin M, Nguyen OK

Sociodemographics, Social Vulnerabilities, and Health Factors Associated with Telemedicine Unreadiness Among US Adults.

Journal of general internal medicine

Wray CM, Tang J, Shah S, Nguyen OK, Keyhani S

Man vs. Machine: Comparing Physician vs. Electronic Health Record-Based Model Predictions for 30-Day Hospital Readmissions.

Journal of general internal medicine

Nguyen OK, Washington C, Clark CR, Miller ME, Patel VA, Halm EA, Makam AN

Time to ACT: launching an Addiction Care Team (ACT) in an urban safety-net health system.

BMJ open quality

Martin M, Snyder HR, Coffa D, Steiger S, Clement JP, Ranji SR, Azari S, Nguyen OK, Lum PJ

Comparative effectiveness of long-term acute care hospital versus skilled nursing facility transfer.

BMC health services research

Makam AN, Nguyen OK, Miller ME, Shah SJ, Kapinos KA, Halm EA

Can we predict early 7-day readmissions using a standard 30-day hospital readmission risk prediction model?

BMC medical informatics and decision making

Saleh SN, Makam AN, Halm EA, Nguyen OK

The Clinical Course after Long-Term Acute Care Hospital Admission among Older Medicare Beneficiaries.

Journal of the American Geriatrics Society

Makam AN, Tran T, Miller ME, Xuan L, Nguyen OK, Halm EA

Evidence-Based Medicine and the American Thoracic Society Guidelines-Reply.

JAMA internal medicine

Schumacher RC, Nguyen OK, Makam AN

Improving Respiratory Rate Accuracy in the Hospital: A Quality Improvement Initiative.

Journal of hospital medicine

Keshvani N, Berger K, Gupta A, DePaola S, Nguyen OK, Makam AN

The Impact of Block Ambulatory Scheduling on Internal Medicine Residencies: a Systematic Review.

Journal of general internal medicine

DeWaters AL, Loria H, Mayo H, Chisty A, Nguyen OK

Evidence-Based Medicine and the American Thoracic Society Clinical Practice Guidelines.

JAMA internal medicine

Schumacher RC, Nguyen OK, Deshpande K, Makam AN

Association of Scheduled vs Emergency-Only Dialysis With Health Outcomes and Costs in Undocumented Immigrants With End-stage Renal Disease.

JAMA internal medicine

Nguyen OK, Vazquez MA, Charles L, Berger JR, Quiñones H, Fuquay R, Sanders JM, Kapinos KA, Halm EA, Makam AN

Effect of Site-Neutral Payment Policy on Long-Term Acute Care Hospital Use.

Journal of the American Geriatrics Society

Makam AN, Nguyen OK, Kirby B, Miller ME, Xuan L, Halm EA

Long-Term Acute Care Hospital Use of Non-Mechanically Ventilated Hospitalized Older Adults.

Journal of the American Geriatrics Society

Makam AN, Nguyen OK, Xuan L, Miller ME, Halm EA

The Influence of Financial Strain on Health Decision-Making.

Journal of general internal medicine

Nguyen OK, Higashi RT, Makam AN, Mijares JC, Lee SC

Acute Myocardial Infarction Readmission Risk Prediction Models: A Systematic Review of Model Performance.

Circulation. Cardiovascular quality and outcomes

Smith LN, Makam AN, Darden D, Mayo H, Das SR, Halm EA, Nguyen OK

What Are the Opportunity Costs of Self-Financing Medical Education?

Academic medicine : journal of the Association of American Medical Colleges

Nguyen OK, Makam AN

Roadmap for improving the accuracy of respiratory rate measurements.

BMJ quality & safety

Keshvani N, Berger K, Nguyen OK, Makam AN

Incidence, Predictors, and Outcomes of Hospital-Acquired Anemia.

Journal of hospital medicine

Makam AN, Nguyen OK, Clark C, Halm EA

Predicting 30-Day Pneumonia Readmissions Using Electronic Health Record Data.

Journal of hospital medicine

Makam AN, Nguyen OK, Clark C, Zhang S, Xie B, Weinreich M, Mortensen EM, Halm EA

Who Is Food Insecure? Implications for Targeted Recruitment and Outreach, National Health and Nutrition Examination Survey, 2005-2010.

Preventing chronic disease

Pruitt SL, Leonard T, Xuan L, Amory R, Higashi RT, Nguyen OK, Pezzia C, Swales S

Predicting the Risk of Readmission in Pneumonia. A Systematic Review of Model Performance.

Annals of the American Thoracic Society

Weinreich M, Nguyen OK, Wang D, Mayo H, Mortensen EM, Halm EA, Makam AN

Vital Signs Are Still Vital: Instability on Discharge and the Risk of Post-Discharge Adverse Outcomes.

Journal of general internal medicine

Nguyen OK, Makam AN, Clark C, Zhang S, Xie B, Velasco F, Amarasingham R, Halm EA

Further Limitations of the HOSPITAL Score in US Hospitals.

JAMA internal medicine

Nguyen OK, Halm EA, Makam AN

Predicting all-cause readmissions using electronic health record data from the entire hospitalization: Model development and comparison.

Journal of hospital medicine

Nguyen OK, Makam AN, Clark C, Zhang S, Xie B, Velasco F, Amarasingham R, Halm EA

Relationship between hospital financial performance and publicly reported outcomes.

Journal of hospital medicine

Nguyen OK, Halm EA, Makam AN

Trends in Long-Term Acute Care Hospital Use in Texas from 2002-2011.

Annals of gerontology and geriatric research

Makam AN, Nguyen OK, Zhou J, Ottenbacher KJ, Halm EA

Use of cardiac biomarker testing in the emergency department.

JAMA internal medicine

Makam AN, Nguyen OK

Envisioning a social-health information exchange as a platform to support a patient-centered medical neighborhood: a feasibility study.

Journal of general internal medicine

Nguyen OK, Chan CV, Makam A, Stieglitz H, Amarasingham R

Identifying patients with diabetes and the earliest date of diagnosis in real time: an electronic health record case-finding algorithm.

BMC medical informatics and decision making

Makam AN, Nguyen OK, Moore B, Ma Y, Amarasingham R

Hospital-initiated transitional care interventions as a patient safety strategy: a systematic review.

Annals of internal medicine

Rennke S, Nguyen OK, Shoeb MH, Magan Y, Wachter RM, Ranji SR

Pediatric cortical dysplasia: correlations between neuroimaging, electrophysiology and location of cytomegalic neurons and balloon cells and glutamate/GABA synaptic circuits.

Developmental neuroscience

Cepeda C, André VM, Flores-Hernández J, Nguyen OK, Wu N, Klapstein GJ, Nguyen S, Koh S, Vinters HV, Levine MS, Mathern GW

Increased GABAergic function in mouse models of Huntington's disease: reversal by BDNF.

Journal of neuroscience research

Cepeda C, Starling AJ, Wu N, Nguyen OK, Uzgil B, Soda T, André VM, Ariano MA, Levine MS

Identification of a prion protein epitope modulating transmission of bovine spongiform encephalopathy prions to transgenic mice.

Proceedings of the National Academy of Sciences of the United States of America

Scott MR, Safar J, Telling G, Nguyen O, Groth D, Torchia M, Koehler R, Tremblay P, Walther D, Cohen FE, DeArmond SJ, Prusiner SB