UCI Health will see you now: Welcome to our new co-workers and patients from Fountain Valley, Lakewood, Los Alamitos and Placentia Linda! 

Lanny Hsieh

Lanny L. Hsieh, MD


Hospitalist, Infectious Disease

Clinical Interests

general infectious disease, HIV, infectious disease in transplant patients

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  • American Board of Internal Medicine, Infectious Disease [Internal Medicine]
  • American Board of Internal Medicine, Internal Medicine - General
  • English
  • Cantonese
  • Mandarin
Medical School
New York University School of Medicine
UCI Medical CenterInternal Medicine
UCI Medical CenterInternal Medicine
UCI Medical CenterInfectious Disease
Professional Positions
  • Professor — Division of Infectious Diseases and Division of General Internal Medicine & Primary Care, Department of Medicine, UCI School of Medicine
Awards and Recognition
  • Physicians of Excellence, Orange County Medical Association — 2021-2022
More Information

Dr. Lanny L. Hsieh is a board-certified UCI Health internist who specializes in infectious diseases and hospital medicine. Her clinical interests include COVID-19 and other infectious diseases, as well care for hospitalized patients.

Hsieh earned her medical degree at New York University's Grossman School of Medicine in New York City. She completed an internship and residency in internal medicine at UCI Medical Center, where she subsequently completed a fellowship in infectious diseases.

Her research interests include fluoroquinolone resistance and SARS-CoV2.

Hsieh, who speaks Cantonese and Mandarin, sees patients at UCI Medical Center in Orange.

UCI Medical Center
101 The City Drive South
Orange, CA 92868