Josephine Ni, M.D.

  • Internal Medicine - Digestive and Liver Diseases
  • Gastroenterology
  • Microbiology


Josephine Ni, M.D., is an Assistant Professor in the Departments of Internal Medicine and Microbiology at UT Southwestern Medical Center. She is a gastroenterologist who focuses on the treatment of inflammatory bowel diseases.

Dr. Ni earned her medical degree at Northwestern University and completed a residency in internal medicine at New York University, where she served as a chief resident. She received advanced training in gastroenterology through a fellowship at the University of Pennsylvania, where she continued as faculty until 2021.

Board certified in internal medicine and gastroenterology, she joined the UT Southwestern faculty in 2021.

Dr. Ni is a physician-scientist. Her research explores bacterial colonization of the healthy and inflamed intestinal tract with the goal of modulating the gut microbiota to treat intestinal diseases. She is a recipient of the American Gastroenterological Association-Takeda Research Scholar Award in Inflammatory Bowel Disease, and her current research is funded by the NIH as well as a Career Award for Medical Scientists from the Burroughs Wellcome Fund. She is the author of multiple publications and has been invited to speak both nationally and internationally on her research.

Dr. Ni is a member of the American Gastroenterological Association and the Crohn’s and Colitis Foundation.

Education & Training
  • Fellowship - University of Pennsylvania Perelman School of Medicine (2013-2016), Gastroenterology
  • Residency - New York University School of Medicine (2009-2013), Internal Medicine
  • Medical School - Northwestern University Feinberg School of Medicine (2005-2009)
Professional Associations & Affiliations
  • American Gastroenterological Association
  • Crohn’s and Colitis Foundation
Honors & Awards
  • Career Award for Medical Scientists 2020-2025, Burroughs Wellcome Fund
  • Research Scholar Award in Inflammatory Bowel Disease 2017-2020, American Gastroenterological Association-Takeda
  • Frank Brooks Research Award in Gastroenterology 2016, Perelman School of Medicine/University of Pennsylvania
  • Intern of the Year Award 2010, New York University Department of Medicine
Books & Publications

Clinical Focus

  • Gastroenterology
  • Microbiology

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