Tom Tielleman, M.D., is an Assistant Professor in the Department of Internal Medicine at UT Southwestern Medical Center, and a member of its Division of Digestive and Liver Diseases. He specializes in therapeutic endoscopybiliary disorders, and pancreatic cancer prevention.

Originally from San Antonio, Texas, Dr. Tielleman holds a bachelor's degree in biochemistry and molecular biology from Trinity University, where he graduated with honors. He earned his medical degree at UT Southwestern, where he also completed his internal medicine residency training, as well as advanced training through fellowship programs in gastroenterology and advanced therapeutic endoscopy.

Certified by the American Board of Internal Medicine in gastroenterology, he joined the UT Southwestern faculty in 2021.

Dr. Tielleman is an active member of the American College of Gastroenterology, the American Gastroenterological Association, and the American Society for Gastrointestinal Endoscopy.

Personal Note

During his free time, Dr. Tielleman enjoys cooking, traveling, and spending time with his family.


Medical School
UT Southwestern Medical School (2014)
UT Southwestern Medical Center (2017), Internal Medicine
UT Southwestern Medical Center (2020), Gastroenterology

Research Interest

  • Hepatobiliary Disorders
  • Therapeutic Endoscopy


Featured Publications LegendFeatured Publications

Prognostic Value of Hypochloremia in Critically Ill Patients With Decompensated Cirrhosis.
Sumarsono A, Wang J, Xie L, Cerro Chiang G, Tielleman T, Messiah SE, Singal AG, Mufti A, Chen C, Leveno M, Crit. Care Med. 2020 Sep
Epidemiology and Risk Factors for Upper Gastrointestinal Bleeding.
Tielleman T, Bujanda D, Cryer B, Gastrointest Endosc Clin N Am 2015 Jul 25 3 415-28


Featured Books Legend Featured Books

Honors & Awards

  • First Place, World Cup of Endoscopy
    American Society of Gastrointestinal Endoscopy (2022)
  • Chief Fellow
    UT Southwestern Gastroenterology Fellowship Program (2019-2020)
  • Housestaff Officer of Excellence
    UT Southwestern Internal Medicine Residency (2016)
  • Alpha Omega Alpha
    Medical Honor Society (0)
  • Internal Medicine Teaching Award
    UT Southwestern (0)

Professional Associations/Affiliations

  • American College of Gastroenterology
  • American Gastroenterological Association
  • American Society of Gastrointestinal Endoscopy