Thomas G. Cotter, 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 general hepatology and transplant hepatology, with interests in all liver diseases including alcohol-associated liver disease and nonalcoholic fatty liver disease. In addition, he performs regular screening and diagnostic endoscopies and colonoscopies.

Dr. Cotter earned his medical degree at the National University of Ireland in Galway, Ireland. He completed an internal medicine residency at the Mayo Clinic in Rochester, Minnesota, and then received advanced training in gastroenterology and transplant hepatology through fellowships at the University of Chicago Medical Center. He also holds a Master of Science in public health sciences from the University of Chicago.

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

Dr. Cotter's research is primarily outcomes-based and is focused on improving the care of patients with alcohol-associated liver disease and of liver transplant recipients. He is the author of numerous publications and case reports, and he has delivered many invited lectures. Additionally, he has contributed to several books, including Clinical Dilemmas in Viral Liver Disease. He is currently a steering committee member on a NIH grant (AlcHepNet) and has a career development award from the American Association for the Study of Liver Diseases.

He is a member of several professional organizations, including the American Association for the Study of Liver Diseases, the American College of Gastroenterology, and the American Gastroenterological Association.


Medical School
National University of Ireland - Galway (2013)
Mayo Clinic College of Medicine (2017), Internal Medicine
University of Chicago Medical Center (2020), Gastroenterology & Liver Diseases
University of Chicago Medical Center (2021), Transplant Hepatology


Featured Publications LegendFeatured Publications

"Raising HOPE": Improved Outcomes for HIV/HCV-coinfected Liver Transplant Recipients in the Direct-acting Antiviral Era.
Cotter TG, Wang J, Lieber SR, Odenwald MA, Rich NE, Marrero JA, Singal AG, Mitchell MC, Aronsohn A, Charlton M, Fung J, Transplant Direct 2021 Jul 7 7 e707
Living Donor Liver Transplantation in the United States: Evolution of Frequency, Outcomes, Center Volumes, and Factors Associated With Outcomes.
Cotter TG, Minhem M, Wang J, Peeraphatdit T, Ayoub F, Pillai A, Hernandez-Alejandro R, di Sabato D, Charlton M, Liver Transpl 2021 07 27 7 1019-1031
Liver Transplantation of HCV-viremic Donors Into HCV-negative Recipients in the United States: Increasing Frequency With Profound Geographic Variation.
Cotter TG, Aronsohn A, Reddy KG, Charlton M, Transplantation 2021 06 105 6 1285-1290
Simultaneous Heart-Liver Transplantation for Congenital Heart Disease in the United States: Rapidly Increasing With Acceptable Outcomes.
Cotter TG, Wang J, Peeraphatdit T, Sandikçi B, Ayoub F, Kim G, Te H, Jeevanandam V, Sabato D, Charlton M, Hepatology 2021 Apr 73 4 1464-1477
Liver transplantation for alcoholic hepatitis in the United States: Excellent outcomes with profound temporal and geographic variation in frequency.
Cotter TG, Sandikçi B, Paul S, Gampa A, Wang J, Te H, Pillai A, Reddy KG, di Sabato D, Little EC, Sundaram V, Fung J, Lucey MR, Charlton M, Am J Transplant 2021 03 21 3 1039-1055
Practice Habits, Knowledge, and Attitudes of Hepatologists to Alcohol Use Disorder Medication: Sobering Gaps and Opportunities.
Cotter TG, Ayoub F, King AC, Reddy KG, Charlton M, Transplant Direct 2020 Oct 6 10 e603
Impact of Nonalcoholic Fatty Liver Disease on Arrhythmia Recurrence Following Atrial Fibrillation Ablation.
Donnellan E, Cotter TG, Wazni OM, Elshazly MB, Kochar A, Wilner B, Patel D, Kanj M, Hussein A, Baranowski B, Cantillon D, Griffin B, Jaber W, Saliba WI, JACC Clin Electrophysiol 2020 10 6 10 1278-1287
Nonalcoholic fatty liver disease: impact on healthcare resource utilization, liver transplantation and mortality in a large, integrated healthcare system.
Cotter TG, Dong L, Holmen J, Gilroy R, Krong J, Charlton M, J Gastroenterol 2020 Jul 55 7 722-730
Increasing Utilization and Excellent Initial Outcomes Following Liver Transplant of Hepatitis C Virus (HCV)-Viremic Donors Into HCV-Negative Recipients: Outcomes Following Liver Transplant of HCV-Viremic Donors.
Cotter TG, Paul S, Sandikçi B, Couri T, Bodzin AS, Little EC, Sundaram V, Charlton M, Hepatology 2019 06 69 6 2381-2395
Improved Graft Survival After Liver Transplantation for Recipients With Hepatitis C Virus in the Direct-Acting Antiviral Era.
Cotter TG, Paul S, Sandikçi B, Couri T, Bodzin AS, Little EC, Sundaram V, Charlton M, Liver Transpl 2019 04 25 4 598-609

Honors & Awards

  • Best Scientific Paper, Inflammatory Bowel Disease (IBD)
    American College of Gastroenterology (2016)
  • International Health Program Scholarship
    Mayo Clinic (2016)
  • Irish National Dr. Henry Hutchinson Stewart Medical Scholarship in Surgery

Professional Associations/Affiliations

  • American Association for the Study of Liver Diseases
  • American College of Gastroenterology
  • American Gastroenterological Association