Renee Hsia , MD, MSc
Professor
Emergency Medicine
School of Medicine

Dr. Hsia speaks Mandarin, Cantonese, Spanish, and French, and provides emergency care to patients with a variety of backgrounds as an attending physician in the emergency department at the Zuckerberg San Francisco General Hospital & Trauma Center, the only county hospital and trauma center for San Francisco, California.

Dr. Hsia’s broad research interests are in health services issues related to increasing access to emergency care and regionalization of care. She has been funded by several private foundation grants, including the Robert Wood Johnson Foundation, as well as the National Institutes of Health (National Heart, Lung, and Blood Institute), and the Agency for Healthcare Research and Quality, to study population access to emergency departments and trauma centers in the U.S; the distribution of emergency care across income areas; factors associated with closure of emergency services (both emergency departments and trauma centers); and how these closures affect patient outcomes, specifically focusing on patients with acute myocardial infarction, stroke, asthma/COPD, sepsis, and trauma. Her research program also focuses on healthcare costs and financing issues with regard to emergency care. She is also the site PI for several multi-site studies validating trauma triage criteria for different age groups as well as their ability to predict high-risk patients. She has published on these issues in a broad range of journals, including the New England Journal of Medicine, the Journal of the American Medical Association, and Health Affairs. Her research has been widely publicized in print media, including the New York Times, the Associated Press, Reuters, USA Today, as well as national network news and radio.

Dr. Hsia received her undergraduate degree from Princeton University at the Woodrow Wilson School of Public and International Affairs, her medical degree from Harvard Medical School, and completed her residency training in emergency medicine at Stanford University. She obtained a Master's in Health Policy, Planning, and Financing from the London School of Economics and the London School of Hygiene and Tropical Medicine. She was also named a Fulbright Scholar for her work on undocumented migrants in the European Union. Dr. Hsia is a member of the National Academy of Medicine, and is the first emergency medicine physician inducted into the American Society for Clinical Investigation.

• Trends by Acuity for Emergency Department Visits and Hospital Admissions in California, 2012 to 2022.
  JAMA network open 2023 Ruxin T, Feldmeier M, Addo N, Hsia RY
• Initial treatment of uninsured patients with ST-elevation myocardial infarction by facility percutaneous coronary intervention capabilities.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2023 Lin S, Shermeyer A, Nikpay S, Hsia RY, Ward MJ
• Adolescent Total and Mental Health-Related Emergency Department Visits During the COVID-19 Pandemic.
  JAMA network open 2023 Villas-Boas SB, Kaplan S, White JS, Hsia RY
• Insurance-Based Disparities in Stroke Center Access in California: A Network Science Approach.
  Circulation. Cardiovascular quality and outcomes 2023 Zachrison KS, Hsia RY, Schwamm LH, Yan Z, Samuels-Kalow ME, Reeves MJ, Camargo CA, Onnela JP
• Differential Treatment and Outcomes for Patients With Heart Attacks in Advantaged and Disadvantaged Communities.
  Journal of the American Heart Association 2023 Shen YC, Sarkar N, Hsia RY
• Development and external validation of a pretrained deep learning model for the prediction of non-accidental trauma.
  NPJ digital medicine 2023 Huang D, Cogill S, Hsia RY, Yang S, Kim D
• Patterns of US Mental Health-Related Emergency Department Visits During the COVID-19 Pandemic.
  JAMA network open 2023 Villas-Boas S, Kaplan S, White JS, Hsia RY
• Re-triage moderates association between state trauma funding and lower mortality of trauma patients.
  Injury 2023 Shi M, Reddy S, Furmanchuk A, Holl JL, Hsia RY, Mackersie RC, Bilimoria KY, Stey AM
• Interfacility Transfer of Uninsured vs Insured Patients With ST-Segment Elevation Myocardial Infarction in California.
  JAMA network open 2023 Ward MJ, Nikpay S, Shermeyer A, Nallamothu BK, Rokos I, Self WH, Hsia RY
• Patterns in Patient Encounters and Emergency Department Capacity in California, 2011-2021.
  JAMA network open 2023 Hsia RY, Zagorov S, Sarkar N, Savides MT, Feldmeier M, Addo N
• Trends in depression risk before and during the COVID-19 pandemic.
  PloS one 2023 Villas-Boas SB, White JS, Kaplan S, Hsia RY
• Emergency department utilization, admissions, and revisits in the United States (New York), Canada (Ontario), and New Zealand: A retrospective cross-sectional analysis.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2023 Duffy J, Jones P, McNaughton CD, Ling V, Matelski J, Hsia RY, Landon BE, Cram P
• Do PCI Facility Openings and Closures Affect AMI Outcomes Differently in High- vs Average-Capacity Markets?
  JACC. Cardiovascular interventions 2023 Shen YC, Krumholz HM, Hsia RY
• Trends in Payer Type for Emergency Department Visits in California, 2011-2019.
  JAMA network open 2023 Hsia RY, Feldmeier M, Sarkar N
• Geographic Disparities in Re-triage Destinations Among Seriously Injured Californians.
  Annals of surgery open : perspectives of surgical history, education, and clinical approaches 2023 Furmanchuk A, Rydland KJ, Hsia RY, Mackersie R, Shi M, Hauser MW, Kho A, Bilimoria KY, Stey AM
• Trends in the likelihood of receiving percutaneous coronary intervention in a low-volume hospital and disparities by sociodemographic communities.
  PloS one 2023 Wang C, Lindquist K, Krumholz H, Hsia RY
• Association of emergency department crowding with inpatient outcomes.
  Health services research 2022 Hsuan C, Segel JE, Hsia RY, Wang Y, Rogowski J
• Geriatric Falls: Patient Characteristics Associated with Emergency Department Revisits.
  The western journal of emergency medicine 2022 Cox DD, Subramony R, Supat B, Brennan JJ, Hsia RY, Castillo EM
• Structural Inequities for Historically Underserved Communities in the Adoption of Stroke Certification in the United States.
  JAMA neurology 2022 Shen YC, Sarkar N, Hsia RY
• Revisits After Emergency Department Discharge for Conditions with High Disposition-Decision Variability at Hospitals with High and Low Discharge Rates.
  The western journal of emergency medicine 2022 Baehr A, Fought AJ, Hsia RY, Wiler JL, Ginde AA
• Trends in Inequities in the Treatment of and Outcomes for Women and Minorities with Myocardial Infarction.
  Annals of emergency medicine 2022 Montoy JCC, Shen YC, Hsia RY
• Association of Residential Racial and Ethnic Segregation With Legal Intervention Injuries in California.
  JAMA network open 2022 Ormseth CH, Mooney AC, Mitchell O, Hsia RY
• The association between area deprivation index and emergency department discharge rates and revisits.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2022 Baehr A, Fought AJ, Hsia RY, Wiler JL, Ginde AA
• The relationship between stroke system organization and disparities in access to stroke center care in California.
  Journal of the American College of Emergency Physicians open 2022 Zachrison KS, Samuels-Kalow ME, Li S, Yan Z, Reeves MJ, Hsia RY, Schwamm LH, Camargo CA
• Structural Discrimination in Emergency Care: How a Sick System Affects Us All.
  Med (New York, N.Y.) 2022 Hsia RY, Zagorov S
• Perspectives on Spain's legislative experience providing access to healthcare to irregular migrants: a qualitative interview study.
  BMJ open 2021 Hsia RY, Gil-González D
• Cancer-related Emergency Department Visits: Comparing Characteristics and Outcomes.
  The western journal of emergency medicine 2021 Nene RV, Brennan JJ, Castillo EM, Tran P, Hsia RY, Coyne CJ
• Association of STEMI regionalization of care with de facto NSTEMI regionalization.
  American heart journal 2021 Montoy JCC, Shen YC, Krumholz HM, Hsia RY
• Barriers and Facilitators to Accessing Health Services for People Without Documentation Status in an Anti-Immigrant Era: A Socioecological Model.
  Health equity 2021 Alwan RM, Kaki DA, Hsia RY
• Nationwide study on trends in unplanned hospital attendance and deaths during the 7 weeks after the onset of the COVID-19 pandemic in Denmark.
  BMJ quality & safety 2021 Bogh SB, Fløjstrup M, Nissen SK, Hanson S, Bech M, Johnsen SP, Kristensen MR, Laugesen LE, Søndergaard J, Folkestad L, Christensen EF, Henriksen DP, Hsia RY, Graham CA, Lindskou TA, Byg KE, Søvsø MB, …
• Early Do-Not-Resuscitate Orders and Outcome After Intracerebral Hemorrhage.
  Neurocritical care 2021 Madhok DY, Vitt JR, MacIsaac D, Hsia RY, Kim AS, Hemphill JC
• Differential benefits of cardiac care regionalization based on driving time to percutaneous coronary intervention.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2021 Shen YC, Hsia RY
• Letter to the Editor. Discrepancies in national databases for TBI estimates.
  Journal of neurosurgery 2021 Madhok DY, Hsia RY, Manley GT
• Sex bias in admission to tertiary-care centres for acute myocardial infarction and cardiogenic shock.
  European journal of clinical investigation 2021 Sambola A, Elola FJ, Buera I, Fernández C, Bernal JL, Ariza A, Brindis R, Bueno H, Rodríguez-Padial L, Marín F, Barrabés JA, Hsia R, Anguita M
• Association of Cardiac Care Regionalization With Access, Treatment, and Mortality Among Patients With ST-Segment Elevation Myocardial Infarction.
  Circulation. Cardiovascular quality and outcomes 2021 Shen YC, Krumholz H, Hsia RY
• Impact of ST-Segment-Elevation Myocardial Infarction Regionalization Programs on the Treatment and Outcomes of Patients Diagnosed With Non-ST-Segment-Elevation Myocardial Infarction.
  Journal of the American Heart Association 2021 Montoy JCC, Shen YC, Brindis RG, Krumholz HM, Hsia RY
• Age-related incidence and outcomes of sepsis in California, 2008-2015.
  Journal of critical care 2020 Wardi G, Tainter CR, Ramnath VR, Brennan JJ, Tolia V, Castillo EM, Hsia RY, Malhotra A, Schmidt U, Meier A
• Strategy for reliable identification of ischaemic stroke, thrombolytics and thrombectomy in large administrative databases.
  Stroke and vascular neurology 2020 Zachrison KS, Li S, Reeves MJ, Adeoye O, Camargo CA, Schwamm LH, Hsia RY
• The association of Medicaid expansion and racial/ethnic inequities in access, treatment, and outcomes for patients with acute myocardial infarction.
  PloS one 2020 Valdovinos EM, Niedzwiecki MJ, Guo J, Hsia RY
• Evaluation of STEMI Regionalization on Access, Treatment, and Outcomes Among Adults Living in Nonminority and Minority Communities.
  JAMA network open 2020 Hsia RY, Krumholz H, Shen YC
• Changes in Mental Health Following the 2016 Presidential Election.
  Journal of general internal medicine 2020 Yan BW, Hsia RY, Yeung V, Sloan FA
• Assessment of Hospital Readmissions From the Emergency Department After Implementation of Medicare's Hospital Readmissions Reduction Program.
  JAMA network open 2020 Hsuan C, Carr BG, Hsia RY, Hoffman GJ
• Effects of Medicaid expansion on access, treatment and outcomes for patients with acute myocardial infarction.
  PloS one 2020 Valdovinos EM, Niedzwiecki MJ, Guo J, Hsia RY
• The rising cost of commonly used emergency department medications (2006-15).
  The American journal of emergency medicine 2020 Tebo C, Mazer-Amirshahi M, Zocchi MS, Gibson C, Rosenwohl-Mack S, Hsia RY, Fox ER, Nelson LS, Pines JM
• Revisits, readmissions, and outcomes for pediatric traumatic brain injury in California, 2005-2014.
  PloS one 2020 Hsia RY, Mannix RC, Guo J, Kornblith AE, Lin F, Sokolove PE, Manley GT
• Implementation of Federal Dependent Care Policies for Physician-Scientists at Leading US Medical Schools.
  JAMA internal medicine 2020 Ormseth CH, Mangurian C, Jagsi R, Choo EK, Lowenstein DH, Hsia RY
• Emergency Department Closures And Openings: Spillover Effects On Patient Outcomes In Bystander Hospitals.
  Health affairs (Project Hope) 2019 Hsia RY, Shen YC
• Unexpected Deaths Among Patients With Normal Initial Vital Signs.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2019 Yan BW, Hsia RY
• Identification of Emergency Care-Sensitive Conditions and Characteristics of Emergency Department Utilization.
  JAMA network open 2019 Vashi AA, Urech T, Carr B, Greene L, Warsavage T, Hsia R, Asch SM
• Community and Hospital Factors Associated With Stroke Center Certification in the United States, 2009 to 2017.
  JAMA network open 2019 Shen YC, Chen G, Hsia RY
• Ambulance diversions following public hospital emergency department closures.
  Health services research 2019 Hsuan C, Hsia RY, Horwitz JR, Ponce NA, Rice T, Needleman J
• Factors Associated With Geriatric Frequent Users of Emergency Departments.
  Annals of emergency medicine 2019 Castillo EM, Brennan JJ, Howard J, Hsia RY, Chalmers C, Chan TC, Ko KJ
• Access to Federally Qualified Health Centers and Emergency Department Use Among Uninsured and Medicaid-insured Adults: California, 2005 to 2013.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2019 Nath JB, Costigan S, Lin F, Vittinghoff E, Hsia RY
• Past Frequent Emergency Department Use Predicts Mortality.
  Health affairs (Project Hope) 2019 Niedzwiecki MJ, Kanzaria HK, Montoy JC, Hsia RY, Raven MC
• Ten-year trends in traumatic brain injury: a retrospective cohort study of California emergency department and hospital revisits and readmissions.
  BMJ open 2018 Hsia RY, Markowitz AJ, Lin F, Guo J, Madhok DY, Manley GT
• Characterizing pediatric high frequency users of California emergency departments.
  The American journal of emergency medicine 2018 Supat B, Brennan JJ, Vilke GM, Ishimine P, Hsia RY, Castillo EM
• A US National Study of the Association Between Income and Ambulance Response Time in Cardiac Arrest.
  JAMA network open 2018 Hsia RY, Huang D, Mann NC, Colwell C, Mercer MP, Dai M, Niedzwiecki MJ
• Limitations of Using Pediatric Respiratory Illness Readmissions to Compare Hospital Performance.
  Journal of hospital medicine 2018 Kaiser SV, Lam R, Joseph GB, McCulloch C, Hsia RY, Cabana MD, Bardach NS
• Injury-based Geographic Access to Trauma Centers.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2018 Wei R, Clay Mann N, Dai M, Hsia RY
• Factors Associated With Emergency Department Use by Patients With and Without Mental Health Diagnoses.
  JAMA network open 2018 Niedzwiecki MJ, Sharma PJ, Kanzaria HK, McConville S, Hsia RY
• Association of Legal Intervention Injuries With Race and Ethnicity Among Patients Treated in Emergency Departments in California.
  JAMA network open 2018 Mooney AC, McConville S, Rappaport AJ, Hsia RY
• Comparing resource use between paediatric emergency department visits by triage level.
  Emergency medicine journal : EMJ 2018 Samuels-Kalow ME, Niedzwiecki M, Friedman AB, Sokolove PE, Hsia RY
• Priorities to Overcome Barriers Impacting Data Science Application in Emergency Care Research.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2018 Puskarich MA, Callaway C, Silbergleit R, Pines JM, Obermeyer Z, Wright DW, Hsia RY, Shah MN, Monte AA, Limkakeng AT, Meisel ZF, Levy PD
• Limitations of Using Pediatric Respiratory Illness Readmissions to Compare Hospital Performance
  J Hosp Med 2018 Kaiser S, Lam R, Gabby JB, McCulloch C, Hsia RY, Cabana M, Bardach N
• Trends in the utilisation of emergency departments in California, 2005-2015: a retrospective analysis.
  BMJ open 2018 Hsia RY, Sabbagh SH, Guo J, Nuckton TJ, Niedzwiecki MJ
• Is Inpatient Volume Or Emergency Department Crowding A Greater Driver Of Ambulance Diversion?
  Health affairs (Project Hope) 2018 Hsia RY, Sarkar N, Shen YC
• How do ED patients with criminal justice contact compare with other ED users? A retrospective analysis of ED visits in California.
  BMJ open 2018 McConville S, Mooney AC, Williams BA, Hsia RY
• Not All Insurance Is Equal: Differential Treatment and Health Outcomes by Insurance Coverage Among Nonelderly Adult Patients With Heart Attack.
  Journal of the American Heart Association 2018 Niedzwiecki MJ, Hsia RY, Shen YC
• Frequent Emergency Department Users: A Statewide Comparison Before And After Affordable Care Act Implementation.
  Health affairs (Project Hope) 2018 McConville S, Raven MC, Sabbagh SH, Hsia RY
• Causes of Shortness of Breath in the Acute Patient: A National Study.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2018 Hale ZE, Singhal A, Hsia RY
• Erratum: This Article Corrects: "Trends in Regionalization of Care for ST-Segment Elevation Myocardial Infarction".
  The western journal of emergency medicine 2018 Hsia RY, Sabbagh S, Sarkar N, Sporer K, Rokos IC, Brown JF, Brindis RG, Guo J, Shen YC
• Emergency Psychiatric Care: The Authors Reply.
  Health affairs (Project Hope) 2018 Raven MC, Hsia RY, Kanzaria HK
• Are trends in billing for high-intensity emergency care explained by changes in services provided in the emergency department? An observational study among US Medicare beneficiaries.
  BMJ open 2018 Burke LG, Wild RC, Orav EJ, Hsia RY
• Short-Term Outcomes and Factors Associated With Adverse Events Among Adults Discharged From the Emergency Department After Treatment for Acute Heart Failure.
  Circulation. Heart failure 2017 Sax DR, Mark DG, Hsia RY, Tan TC, Tabada GH, Go AS
• Complying with the Emergency Medical Treatment and Labor Act (EMTALA): Challenges and solutions.
  Journal of healthcare risk management : the journal of the American Society for Healthcare Risk Management 2017 Hsuan C, Horwitz JR, Ponce NA, Hsia RY, Needleman J
• Avoidable emergency department visits: a starting point.
  International journal for quality in health care : journal of the International Society for Quality in Health Care 2017 Hsia RY, Niedzwiecki M
• Persistent Frequent Emergency Department Use: Core Group Exhibits Extreme Levels Of Use For More Than A Decade.
  Health affairs (Project Hope) 2017 Kanzaria HK, Niedzwiecki MJ, Montoy JC, Raven MC, Hsia RY
• Differences between incarcerated and non-incarcerated patients who die in community hospitals highlight the need for palliative care services for seriously ill prisoners in correctional facilities and in community hospitals: A cross-sectional study.
  Palliative medicine 2017 Rothman A, McConville S, Hsia R, Metzger L, Ahalt C, Williams BA
• Don't Hate the Player; Hate the Game.
  Annals of emergency medicine 2017 Hsia RY, King J, Carr BG
• Trends in Regionalization of Care for ST-Segment Elevation Myocardial Infarction.
  The western journal of emergency medicine 2017 Hsia RY, Sabbagh S, Sarkar N, Sporer K, Rokos IC, Brown JF, Brindis RG, Guo J, Shen YC
• Impact Of Ambulance Diversion: Black Patients With Acute Myocardial Infarction Had Higher Mortality Than Whites.
  Health affairs (Project Hope) 2017 Hsia RY, Sarkar N, Shen YC
• It's Time for a Strategic Approach to Observation Care.
  Journal of hospital medicine 2017 Sabbatini AK, Hsia RY
• Trends in the supply of California's emergency departments and inpatient services, 2005-2014: a retrospective analysis.
  BMJ open 2017 Chow JL, Niedzwiecki MJ, Hsia RY
• The American College of Surgeons Needs-Based Assessment of Trauma Systems: Estimates for the State of California.
  The journal of trauma and acute care surgery 2017 Uribe-Leitz T, Esquivel MM, Knowlton LM, Ciesla D, Lin F, Hsia RY, Spain DA, Winchell RJ, Staudenmayer KL
• Validating the Use of ICD-9 Code Mapping to Generate Injury Severity Scores.
  Journal of trauma nursing : the official journal of the Society of Trauma Nurses 2017 Fleischman RJ, Mann NC, Dai M, Holmes JF, Wang NE, Haukoos J, Hsia RY, Rea T, Newgard CD
• Association Between Emergency Department Closure and Treatment, Access, and Health Outcomes Among Patients With Acute Myocardial Infarction.
  Circulation 2016 Shen YC, Hsia RY
• Geographical Distribution of Emergency Department Closures and Consequences on Heart Attack Patients
  National Bureau of Economic Research 2016 Shen YC, Hsia RY
• Emergency Department Death Rates: The Authors Reply.
  Health affairs (Project Hope) 2016 Kanzaria HK, Hsia RY, Probst MA
• Federally Qualified Health Center Access and Emergency Department Use Among Children.
  Pediatrics 2016 Nath JB, Costigan S, Lin F, Vittinghoff E, Hsia RY
• A Novel Survey Tool to Quantify the Degree and Duration of STEMI Regionalization Across California.
  Critical pathways in cardiology 2016 Rokos IC, Sporer K, Savino PB, Mercer MP, Shontz SS, Sabbagh S, Hsia RY
• Emergency Department Length-Of-Stay For Psychiatric Visits Was Significantly Longer Than For Nonpsychiatric Visits, 2002-11.
  Health affairs (Project Hope) 2016 Zhu JM, Singhal A, Hsia RY
• Racial-Ethnic Disparities in Opioid Prescriptions at Emergency Department Visits for Conditions Commonly Associated with Prescription Drug Abuse.
  PloS one 2016 Singhal A, Tien YY, Hsia RY
• Geographic Discordance Between Patient Residence and Incident Location in Emergency Medical Services Responses.
  Annals of emergency medicine 2016 Hsia RY, Dai M, Wei R, Sabbagh S, Mann NC
• Geographic disparities in access to urban trauma care: defining the problem and identifying a solution for gunshot wound victims in Chicago.
  American journal of surgery 2016 Wandling M, Behrens J, Hsia R, Crandall M
• Hospitalization After a Return Visit to the Emergency Department--Reply.
  JAMA 2016 Sabbatini AK, Basu A, Hsia RY
• A National Study of the Prevalence of Life-Threatening Diagnoses in Patients With Chest Pain.
  JAMA internal medicine 2016 Hsia RY, Hale Z, Tabas JA
• Emergency Department Death Rates Dropped By Nearly 50 Percent, 1997-2011.
  Health affairs (Project Hope) 2016 Kanzaria HK, Probst MA, Hsia RY
• Urgent Care Needs Among Nonurgent Visits to the Emergency Department.
  JAMA internal medicine 2016 Hsia RY, Friedman AB, Niedzwiecki M
• Effects of closure of an urban level I trauma centre on adjacent hospitals and local injury mortality: a retrospective, observational study.
  BMJ open 2016 Crandall M, Sharp D, Wei X, Nathens A, Hsia RY
• Changes in Demographics of Patients Seen at Federally Qualified Health Centers, 2005-2014.
  JAMA internal medicine 2016 Nath JB, Costigan S, Hsia RY
• Community characteristics associated with where urgent care centers are located: a cross-sectional analysis.
  BMJ open 2016 Le ST, Hsia RY
• The Triage of Injured Patients: Mechanism of Injury, Regardless of Injury Severity, Determines Hospital Destination.
  The American surgeon 2016 Staudenmayer K, Wang NE, Weiser TG, Maggio P, Mackersie RC, Spain D, Hsia RY
• Do patients hospitalised in high-minority hospitals experience more diversion and poorer outcomes? A retrospective multivariate analysis of Medicare patients in California.
  BMJ open 2016 Shen YC, Hsia RY
• Cost-Effectiveness of Field Trauma Triage among Injured Adults Served by Emergency Medical Services.
  Journal of the American College of Surgeons 2016 Newgard CD, Yang Z, Nishijima D, McConnell KJ, Trent SA, Holmes JF, Daya M, Mann NC, Hsia RY, Rea TD, Wang NE, Staudenmayer K, Delgado MK, Western Emergency Services Translational Research Network …
• Trauma center care is associated with reduced readmissions after injury.
  The journal of trauma and acute care surgery 2016 Staudenmayer K, Weiser TG, Maggio PM, Spain DA, Hsia RY
• In-Hospital Outcomes and Costs Among Patients Hospitalized During a Return Visit to the Emergency Department.
  JAMA 2016 Sabbatini AK, Kocher KE, Basu A, Hsia RY
• Relationship of Affordable Care Act Implementation to Emergency Department Utilization Among Young Adults.
  Annals of emergency medicine 2016 Hernandez-Boussard T, Morrison D, Goldstein BA, Hsia RY
• The Relationship of Financial Pressures and Community Characteristics to Closure of Private Safety Net Clinics.
  Medical care research and review : MCRR 2015 Li S, Dor A, Pines JM, Zocchi MS, Hsia RY
• Use of emergency department imaging in patients with minor trauma.
  The Journal of surgical research 2015 Tong GE, Staudenmayer K, Lin F, Hsia RY
• Emergency department observation units: Less than we bargained for?
  Journal of hospital medicine 2015 Fahimi J, Hsia RY
• Private Safety-Net Clinics: Effects of Financial Pressures and Community Characteristics on Closures
  National Bureau of Economic Research 2015 Li S, Dor A, Pines JM, Zocchi MS, Hsia RY
• Hospitals' Charity Care: The Authors Reply.
  Health affairs (Project Hope) 2015 Valdovinos E, Le S, Hsia RY
• Improving early identification of the high-risk elderly trauma patient by emergency medical services.
  Injury 2015 Newgard CD, Holmes JF, Haukoos JS, Bulger EM, Staudenmayer K, Wittwer L, Stecker E, Dai M, Hsia RY, Western Emergency Services Translational Research Network (WESTRN) Investigators
• Prehospital and Emergency Care: Updates from the Disease Control Priorities, Version 3.
  World journal of surgery 2015 Hsia RY, Thind A, Zakariah A, Hicks ER, Mock C
• Ambulance diversion associated with reduced access to cardiac technology and increased one-year mortality.
  Health affairs (Project Hope) 2015 Shen YC, Hsia RY
• In California, not-for-profit hospitals spent more operating expenses on charity care than for-profit hospitals spent.
  Health affairs (Project Hope) 2015 Valdovinos E, Le S, Hsia RY
• Percutaneous Coronary Intervention in the United States: Risk Factors for Untimely Access.
  Health services research 2015 Hsia RY, Shen YC
• No Place to Call Home--Policies to Reduce ED Use in Medicaid.
  The New England journal of medicine 2015 Friedman AB, Saloner B, Hsia RY
• Comparison of Mortality and Costs at Trauma and Nontrauma Centers for Minor and Moderately Severe Injuries in California.
  Annals of emergency medicine 2015 Zocchi MS, Hsia RY, Carr BG, Sarani B, Pines JM
• California emergency department visit rates for medical conditions increased while visit rates for injuries fell, 2005-11.
  Health affairs (Project Hope) 2015 Hsia RY, Nath JB, Baker LC
• Regional availability of mechanical embolectomy for acute ischemic stroke in California, 2009 to 2010.
  Stroke 2015 Choi JC, Hsia RY, Kim AS
• Children's emergency department use for asthma, 2001-2010.
  Academic pediatrics 2015 Nath JB, Hsia RY
• Association between emergency department length of stay and rates of admission to inpatient and observation services.
  JAMA internal medicine 2014 Carrier E, Khaldun J, Hsia RY
• Timeliness of care in US emergency departments: an analysis of newly released metrics from the Centers for Medicare & Medicaid services.
  JAMA internal medicine 2014 Le ST, Hsia RY
• Emergency department visits by children, adolescents, and young adults in California by insurance status, 2005-2010.
  JAMA 2014 Hsia RY, Nath JB, Baker LC
• A variation in the value of colectomy for cancer across hospitals: mortality, readmissions, and costs.
  Surgery 2014 Fox JP, Tyler JA, Vashi AA, Hsia RY, Saxe JM
• Association of Medicare and Medicaid insurance with increasing primary care-treatable emergency department visits in the United States.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2014 Pukurdpol P, Wiler JL, Hsia RY, Ginde AA
• Emergency department utilization among frequent users with psychiatric visits.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2014 Brennan JJ, Chan TC, Hsia RY, Wilson MP, Castillo EM
• Variation in charges for 10 common blood tests in California hospitals: a cross-sectional analysis.
  BMJ open 2014 Hsia RY, Akosa Antwi Y, Nath JB, Nath JP
• The association between advanced diagnostic imaging and ED length of stay.
  The American journal of emergency medicine 2014 Kanzaria HK, Probst MA, Ponce NA, Hsia RY
• A cross-sectional analysis of variation in charges and prices across California for percutaneous coronary intervention.
  PloS one 2014 Hsia RY, Akosa Antwi Y, Weber E, Brownell Nath J
• California emergency department closures are associated with increased inpatient mortality at nearby hospitals.
  Health affairs (Project Hope) 2014 Liu C, Srebotnjak T, Hsia RY
• Physiologic field triage criteria for identifying seriously injured older adults.
  Prehospital emergency care 2014 Newgard CD, Richardson D, Holmes JF, Rea TD, Hsia RY, Mann NC, Staudenmayer K, Barton ED, Bulger EM, Haukoos JS, Western Emergency Services Translational Research Network (WESTRN) Investigators
• The association between community-level insurance coverage and emergency department use.
  Medical care 2014 Baker LC, Hsia RY
• Variation in charges for emergency department visits across California.
  Annals of emergency medicine 2014 Hsia RY, Akosa Antwi Y
• The association of trauma center closures with increased inpatient mortality for injured patients.
  The journal of trauma and acute care surgery 2014 Hsia RY, Srebotnjak T, Maselli J, Crandall M, McCulloch C, Kellermann AL
• Variability in California triage from 2005 to 2009: a population-based longitudinal study of severely injured patients.
  The journal of trauma and acute care surgery 2014 Staudenmayer K, Lin F, Mackersie R, Spain D, Hsia R
• From 9-1-1 call to death: evaluating traumatic deaths in seven regions for early recognition of high-risk patients.
  The journal of trauma and acute care surgery 2014 Dean D, Wetzel B, White N, Kuppermann N, Wang NE, Haukoos JS, Hsia RY, Mann NC, Barton ED, Newgard CD, WESTRN Investigators
• Emergency department charges for asthma-related outpatient visits by insurance status.
  Journal of health care for the poor and underserved 2014 Wang T, Srebotnjak T, Brownell J, Hsia RY
• Association of emergency department and hospital characteristics with elopements and length of stay.
  The Journal of emergency medicine 2014 Handel DA, Fu R, Vu E, Augustine JJ, Hsia RY, Shufflebarger CM, Sun B
• Analysis of variation in charges and prices paid for vaginal and caesarean section births: a cross-sectional study.
  BMJ open 2014 Hsia RY, Akosa Antwi Y, Weber E
• Trends in emergency department visits for ambulatory care sensitive conditions by elderly nursing home residents, 2001 to 2010.
  JAMA internal medicine 2014 Brownell J, Wang J, Smith A, Stephens C, Hsia RY
• Emergency care: then, now, and next.
  Health affairs (Project Hope) 2013 Kellermann AL, Hsia RY, Yeh C, Morganti KG
• Quality measurement in the emergency department: past and future.
  Health affairs (Project Hope) 2013 Schuur JD, Hsia RY, Burstin H, Schull MJ, Pines JM
• Is emergency department crowding associated with increased "bounceback" admissions?
  Medical care 2013 Hsia RY, Asch SM, Weiss RE, Zingmond D, Gabayan G, Liang LJ, Han W, McCreath H, Sun BC
• Gunshot injuries in children served by emergency services.
  Pediatrics 2013 Newgard CD, Kuppermann N, Holmes JF, Haukoos JS, Wetzel B, Hsia RY, Wang NE, Bulger EM, Staudenmayer K, Mann NC, Barton ED, Wintemute G, WESTRN Investigators
• High-intensity emergency department visits increased in California, 2002-09.
  Health affairs (Project Hope) 2013 Herring AA, Johnson B, Ginde AA, Camargo CA, Feng L, Alter HJ, Hsia R
• Triage of elderly trauma patients: a population-based perspective.
  Journal of the American College of Surgeons 2013 Staudenmayer KL, Hsia RY, Mann NC, Spain DA, Newgard CD
• Trends in adult emergency department visits in California by insurance status, 2005-2010.
  JAMA 2013 Hsia RY, Brownell J, Wilson S, Gordon N, Baker LC
• Patient choice in the selection of hospitals by 9-1-1 emergency medical services providers in trauma systems.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2013 Newgard CD, Mann NC, Hsia RY, Bulger EM, Ma OJ, Staudenmayer K, Haukoos JS, Sahni R, Kuppermann N, Western Emergency Services Translational Research Network (WESTRN) Investigators
• The cost of overtriage: more than one-third of low-risk injured patients were taken to major trauma centers.
  Health affairs (Project Hope) 2013 Newgard CD, Staudenmayer K, Hsia RY, Mann NC, Bulger EM, Holmes JF, Fleischman R, Gorman K, Haukoos J, McConnell KJ
• Delays in service for non-emergent patients due to arrival of emergent patients in the emergency department: a case study in Hong Kong.
  The Journal of emergency medicine 2013 Xu M, Wong TC, Wong SY, Chin KS, Tsui KL, Hsia RY
• The trade-offs in field trauma triage: a multiregion assessment of accuracy metrics and volume shifts associated with different triage strategies.
  The journal of trauma and acute care surgery 2013 Newgard CD, Hsia RY, Mann NC, Schmidt T, Sahni R, Bulger EM, Wang NE, Holmes JF, Fleischman R, Zive D, Staudenmayer K, Haukoos JS, Kuppermann N, Western Emergency Services Translational Research …
• Trauma deserts: distance from a trauma center, transport times, and mortality from gunshot wounds in Chicago.
  American journal of public health 2013 Crandall M, Sharp D, Unger E, Straus D, Brasel K, Hsia R, Esposito T
• Variation in prehospital use and uptake of the national Field Triage Decision Scheme.
  Prehospital emergency care 2013 Barnett AS, Wang NE, Sahni R, Hsia RY, Haukoos JS, Barton ED, Holmes JF, Newgard CD, WESTRN Investigators
• Comparison of presenting complaint vs discharge diagnosis for identifying " nonemergency" emergency department visits.
  JAMA 2013 Raven MC, Lowe RA, Maselli J, Hsia RY
• Factors associated with short-term bounce-back admissions after emergency department discharge.
  Annals of emergency medicine 2013 Gabayan GZ, Asch SM, Hsia RY, Zingmond D, Liang LJ, Han W, McCreath H, Weiss RE, Sun BC
• "How much will I get charged for this?" Patient charges for top ten diagnoses in the emergency department.
  PloS one 2013 Caldwell N, Srebotnjak T, Wang T, Hsia R
• Effect of emergency department crowding on outcomes of admitted patients.
  Annals of emergency medicine 2012 Sun BC, Hsia RY, Weiss RE, Zingmond D, Liang LJ, Han W, McCreath H, Asch SM
• Is emergency department closure resulting in increased distance to the nearest emergency department associated with increased inpatient mortality?
  Annals of emergency medicine 2012 Hsia RY, Kanzaria HK, Srebotnjak T, Maselli J, McCulloch C, Auerbach AD
• Variability of ICU use in adult patients with minor traumatic intracranial hemorrhage.
  Annals of emergency medicine 2012 Nishijima DK, Haukoos JS, Newgard CD, Staudenmayer K, White N, Slattery D, Maxim PC, Gee CA, Hsia RY, Melnikow JA, Holmes JF
• Helicopter vs ground transportation for patients with trauma.
  JAMA 2012 Delgado MK, Newgard CD, Hsia RY
• California hospitals serving large minority populations were more likely than others to employ ambulance diversion.
  Health affairs (Project Hope) 2012 Hsia RY, Asch SM, Weiss RE, Zingmond D, Liang LJ, Han W, McCreath H, Sun BC
• Health care as a “market good”? Appendicitis as a case study.
  Archives of internal medicine 2012 Hsia RY, Kothari AH, Srebotnjak T, Maselli J
• Evaluating age in the field triage of injured persons.
  Annals of emergency medicine 2012 Nakamura Y, Daya M, Bulger EM, Schreiber M, Mackersie R, Hsia RY, Mann NC, Holmes JF, Staudenmayer K, Sturges Z, Liao M, Haukoos J, Kuppermann N, Barton ED, Newgard CD, WESTRN Investigators
• Deciphering the use and predictive value of "emergency medical services provider judgment" in out-of-hospital trauma triage: a multisite, mixed methods assessment.
  The journal of trauma and acute care surgery 2012 Newgard CD, Kampp M, Nelson M, Holmes JF, Zive D, Rea T, Bulger EM, Liao M, Sherck J, Hsia RY, Wang NE, Fleischman RJ, Barton ED, Daya M, Heineman J, Kuppermann N, WESTRN Investigators
• Evaluating the use of existing data sources, probabilistic linkage, and multiple imputation to build population-based injury databases across phases of trauma care.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2012 Newgard C, Malveau S, Staudenmayer K, Wang NE, Hsia RY, Mann NC, Holmes JF, Kuppermann N, Haukoos JS, Bulger EM, Dai M, Cook LJ, WESTRN investigators
• The forgotten trauma patient: outcomes for injured patients evaluated by emergency medical services but not transported to the hospital.
  The journal of trauma and acute care surgery 2012 Staudenmayer K, Hsia R, Wang E, Sporer K, Ghilarducci D, Spain D, Mackersie R, Sherck J, Kline R, Newgard C
• Association of emergency department length of stay with safety-net status.
  JAMA 2012 Fee C, Burstin H, Maselli JH, Hsia RY
• A multisite assessment of the American College of Surgeons Committee on Trauma field triage decision scheme for identifying seriously injured children and adults.
  Journal of the American College of Surgeons 2011 Newgard CD, Zive D, Holmes JF, Bulger EM, Staudenmayer K, Liao M, Rea T, Hsia RY, Wang NE, Fleischman R, Jui J, Mann NC, Haukoos JS, Sporer KA, Gubler KD, Hedges JR, WESTRN investigators
• System-level health disparities in California emergency departments: minorities and Medicaid patients are at higher risk of losing their emergency departments.
  Annals of emergency medicine 2011 Hsia RY, Srebotnjak T, Kanzaria HK, McCulloch C, Auerbach AD
• Rising closures of hospital trauma centers disproportionately burden vulnerable populations.
  Health affairs (Project Hope) 2011 Hsia RY, Shen YC
• Does decreased access to emergency departments affect patient outcomes? Analysis of acute myocardial infarction population 1996-2005.
  Health services research 2011 Shen YC, Hsia RY
• Radiological imaging of patients with suspected urinary tract stones: national trends, diagnoses, and predictors.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2011 Westphalen AC, Hsia RY, Maselli JH, Wang R, Gonzales R
• Association between ambulance diversion and survival among patients with acute myocardial infarction.
  JAMA 2011 Shen YC, Hsia RY
• Factors associated with closures of emergency departments in the United States.
  JAMA 2011 Hsia RY, Kellermann AL, Shen YC
• Measuring emergency care systems: the path forward.
  Annals of emergency medicine 2011 Hsia RY, Carr BG
• Access to emergency and surgical care in sub-Saharan Africa: the infrastructure gap.
  Health policy and planning 2011 Hsia RY, Mbembati NA, Macfarlane S, Kruk ME
• Disparities in injury mortality between Uganda and the United States: comparative analysis of a neglected disease.
  World journal of surgery 2011 Jayaraman S, Ozgediz D, Miyamoto J, Caldwell N, Lipnick MS, Mijumbi C, Mabweijano J, Hsia R, Dicker R
• Provisional surgical training programs for increasing surgical capacity in rural areas in Niger: reply to letter.
  World journal of surgery 2011 Sani R, Nameoua B, Yahaya A, Hassane I, Adamou R, Hsia RY, Joekman P, Sako A, Habibou A
• Hospital determinants of emergency department left without being seen rates.
  Annals of emergency medicine 2011 Hsia RY, Asch SM, Weiss RE, Zingmond D, Liang LJ, Han W, McCreath H, Sun BC
• Invited commentary--Emergency department neuroimaging: are we using our heads?: Comment on "Use of neuroimaging in US emergency departments".
  Archives of internal medicine 2011 Tabas JA, Hsia RY
• Epidemiology of child injuries in Uganda: challenges for health policy.
  Journal of public health in Africa 2011 Hsia RY, Ozgediz D, Jayaraman S, Kyamanywa P, Mutto M, Kobusingye OC
• Cutaneous cryptococcal infection as a manifestation of disseminated disease. Cryptococcus neoformans.
  Annals of emergency medicine 2011 Lee JJ, Hsia RY
• Factors associated with trauma center use for elderly patients with trauma: a statewide analysis, 1999-2008.
  Archives of surgery (Chicago, Ill. : 1960) 2011 Hsia RY, Wang E, Saynina O, Wise P, Pérez-Stable EJ, Auerbach A
• Possible geographical barriers to trauma center access for vulnerable patients in the United States: an analysis of urban and rural communities.
  Archives of surgery (Chicago, Ill. : 1960) 2011 Hsia R, Shen YC
• Research priorities for administrative challenges of integrated networks of care.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2010 Pilgrim R, Hilton JA, Carrier E, Pines JM, Hufstetler G, Thorby S, Milling TJ, Cesta B, Hsia RY, 2010 Academic emergency medicine consensus conference Beyond regionalization: Intergrated networks
• Penetrating cardiac injury from a wooden knitting needle.
  The Journal of emergency medicine 2010 Hsia RY, Mahadevan SV, Brundage SI
• Trends and characteristics of US emergency department visits, 1997-2007.
  JAMA 2010 Tang N, Stein J, Hsia RY, Maselli JH, Gonzales R
• Epidemiology of injuries presenting to the national hospital in Kampala, Uganda: implications for research and policy.
  International journal of emergency medicine 2010 Hsia RY, Ozgediz D, Mutto M, Jayaraman S, Kyamanywa P, Kobusingye OC
• Changes in emergency department access between 2001 and 2005 among general and vulnerable populations.
  American journal of public health 2010 Shen YC, Hsia RY
• Essential surgery: Integral to the right to health.
  Health and human rights 2010 McQueen KA, Ozgediz D, Riviello R, Hsia RY, Jayaraman S, Sullivan SR, Meara JG
• Do California counties with lower socioeconomic levels have less access to emergency department care?
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2010 Ravikumar D, Hsia R
• Human resource and funding constraints for essential surgery in district hospitals in Africa: a retrospective cross-sectional survey.
  PLoS medicine 2010 Kruk ME, Wladis A, Mbembati N, Ndao-Brumblay SK, Hsia RY, Galukande M, Luboga S, Matovu A, de Miranda H, Ozgediz D, Quiñones AR, Rockers PC, von Schreeb J, Vaz F, Debas HT, Macfarlane SB
• Key concepts for estimating the burden of surgical conditions and the unmet need for surgical care.
  World journal of surgery 2010 Bickler S, Ozgediz D, Gosselin R, Weiser T, Spiegel D, Hsia R, Dunbar P, McQueen K, Jamison D
• Role of collaborative academic partnerships in surgical training, education, and provision.
  World journal of surgery 2010 Riviello R, Ozgediz D, Hsia RY, Azzie G, Newton M, Tarpley J
• Placing emergency care on the global agenda.
  Annals of emergency medicine 2010 Hsia R, Razzak J, Tsai AC, Hirshon JM
• Disparities in trauma center access despite increasing utilization: data from California, 1999 to 2006.
  The Journal of trauma 2010 Hsia RY, Wang E, Torres H, Saynina O, Wise PH
• Increasing access to surgical services in sub-saharan Africa: priorities for national and international agencies recommended by the Bellagio Essential Surgery Group.
  PLoS medicine 2009 Luboga S, Macfarlane SB, von Schreeb J, Kruk ME, Cherian MN, Bergström S, Bossyns PB, Denerville E, Dovlo D, Galukande M, Hsia RY, Jayaraman SP, Lubbock LA, Mock C, Ozgediz D, Sekimpi P, Wladis A, …
• Current patterns of prehospital trauma care in Kampala, Uganda and the feasibility of a lay-first-responder training program.
  World journal of surgery 2009 Jayaraman S, Mabweijano JR, Lipnick MS, Caldwell N, Miyamoto J, Wangoda R, Mijumbi C, Hsia R, Dicker R, Ozgediz D
• Altered mental status from acyclovir.
  The Journal of emergency medicine 2009 Martinez-Diaz GJ, Hsia R
• Emergency care: the increasing weight of increasing waits.
  Archives of internal medicine 2009 Hsia RY, Tabas JA
• The impact of launching surgery at the district level in Niger.
  World journal of surgery 2009 Sani R, Nameoua B, Yahaya A, Hassane I, Adamou R, Hsia RY, Hoekman P, Sako A, Habibou A
• First things first: effectiveness and scalability of a basic prehospital trauma care program for lay first-responders in Kampala, Uganda.
  PloS one 2009 Jayaraman S, Mabweijano JR, Lipnick MS, Caldwell N, Miyamoto J, Wangoda R, Mijumbi C, Hsia R, Dicker R, Ozgediz D
• Understanding the risk factors of trauma center closures: do financial pressure and community characteristics matter?
  Medical care 2009 Shen YC, Hsia RY, Kuzma K
• Population health metrics for surgery: effective coverage of surgical services in low-income and middle-income countries.
  World journal of surgery 2009 Ozgediz D, Hsia R, Weiser T, Gosselin R, Spiegel D, Bickler S, Dunbar P, McQueen K
• Atrial fibrillation from thyroid storm.
  The Journal of emergency medicine 2008 Martinez-Diaz GJ, Formaker C, Hsia R
• Fever, abdominal pain, and leukopenia in a 13-year-old: a case-based review of meningococcemia.
  The Journal of emergency medicine 2008 Hsia RY, Wang E, Thanassi WT
• Pott's Puffy tumor after minor head trauma.
  The American journal of emergency medicine 2008 Martinez-Diaz GJ, Hsia R
• A framework for the economic analysis of child and adolescent mental disorders.
  International review of psychiatry (Abingdon, England) 2008 Hsia RY, Belfer ML
• Trends in charges and payments for nonhospitalized emergency department pediatric visits, 1996-2003.
  Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2008 Hsia RY, MacIsaac D, Palm E, Baker LC
• Decreasing reimbursements for outpatient emergency department visits across payer groups from 1996 to 2004.
  Annals of emergency medicine 2007 Hsia RY, MacIsaac D, Baker LC
• Images in emergency medicine. Cecal volvulus.
  Annals of emergency medicine 2007 Hsia R, Chiao A, Law Courter J
• Do mandates requiring insurers to pay for emergency care influence the use of the emergency department?
  Health affairs (Project Hope) 2006 Hsia RY, Chan J, Baker LC
• Student leadership in public health advocacy: lessons learned from the hepatitis B initiative.
  American journal of public health 2003 Hsu LD, DeJong W, Hsia R, Chang M, Ryou M, Yeh E