Renee Hsia, MD, MSc, FACEP


Renee Y. Hsia, M.D., M.Sc., FACEP is Professor of Emergency Medicine, Health Policy at the University of California San Francisco (UCSF). Her principal interest is the study of health systems to improve the access and delivery of timely acute care for patients, with a particular emphasis on vulnerable populations. Her work has centered around closures of emergency services (including trauma services) in California and nationally, and the effects of closures on patient outcomes for time-sensitive illnesses.  Dr. Hsia also analyzes issues of ED utilization across different insurance groups, and ED crowding (using measures such as ambulance diversion and length of stay) and its association with poorer patient outcomes.

Dr. Hsia is also part of the UCSF Center for Healthcare Value, in the section on Price Transparency, with research focusing on the wide variation of prices and lack of price transparency for healthcare in the United States. 

Her research extends globally, specifically regarding cost-effectiveness of emergency care in developing countries.  She is currently involved in the Disease Control Priorities project with a focus on pre-hospital care.  Dr. Hsia has had clinical and public health experience in numerous countries in Africa, including Rwanda, Uganda, Eritrea, Sudan, South Africa, Senegal, and South Sudan.  She is fluent in Mandarin, Cantonese, French, and Spanish, and is a member of the UCSF Global Health Economics Consortium and the Global Health Steering Committee for the UCSF Department of Emergency Medicine.

Dr. Hsia’s work has been published in high-impact journals, including JAMA, Health Affairs, Medical Care, Health Services Research, Archives of Internal Medicine, Annals of Emergency Medicine, and the American Journal of Public Health.   Her research has been featured nationally in print media (New York Times, Washington Post, USA Today), radio, and network television.  Her work has been funded by the National Institute of Health, Robert Wood Johnson Foundation, Agency for Healthcare Research and Quality, American Heart Association, and Emergency Medicine Foundation. 


1.     Hsia RY, Asch SM, Weiss RE, Zingmond D, Gabayan G, Liang LJ, Han W, McCreath H, Sun BC. Is Emergency Department Crowding Associated With Increased "Bounceback" Admissions? Med Care. 2013;51(11):1008-1014.

2.     Hsia RY, Brownell J, Wilson S, Gordon N, Baker LC. Trends in Adult Emergency Department Visits in California by Insurance Status, 2005-2010 JAMA. 2013;310(11):1181-1183.

3.     Herring A, Johnson B, Ginde A, Camargo C, Harrison A, Hsia RY. Increasing Intensity of Care at Emergency Department Visits in California, 2002-2009. Health Aff (Millwood). 2013;32(10):1811-1819.

4.     Kellermann AL, Hsia RY, Yeh C, Morganti GK. Emergency Care: Then, Now, And Next. Health Aff (Millwood). 2013;32(12):2069-2074.

5.     Hsia RY, Antwi YA. Variation in Charges for Emergency Department Visits Across California. Ann Emerg Med. 2014;64(2):120-126.e4.

6.     Le S, Hsia RY. The Timeliness of Care in U.S. Emergency Departments. JAMA Intern Med. 2014, Published online September 15, 2014. doi:10.1001/jamainternmed.2014.3431.

7.     Hsia RY, Baker LC. The Association Between Community-level Insurance Coverage and Emergency Department Use. Med Care. 2014;52(6):535-40.

8.     Liu C, Srebotnjak T, Hsia RY. Emergency Department Closures Are Associated With Increased Inpatient Mortality At Nearby Hospitals. Health Aff (Millwood). 2014;33(8):1323-1329.

9.     Carrier E, Khaldun J, Hsia RY. The association between emergency department length of stay and rates of admission to inpatient and observation services. JAMA Intern Med. 2014. Published online September 15, 2014. doi:10.1001/jamainternmed.2014.3467.

10.  Hsia RY, Brownell J, Baker LC. Emergency Department Visits by Children, Adolescents, and Young Adults in California by Insurance Status, 2005-2010. JAMA. 2014;312(15):1587-1588.

Selected Projects: 

Effect of Emergency Care Availability on Racial Disparities in Access & Outcomes

Does ED access block contribute to the widening of disparities in outcomes for cardiovascular disease?

The Far-Researching Effects of Emergency Department Closure: Is ED Closure Associated with Increased Mortality Rates for Patients in Surrounding Communities?