Thomas G. Cotter, M.D., M.S.C.P., is an Assistant Professor in the Department of Internal Medicine at UT Southwestern Medical Center and a member of the 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.

Originally from Ireland, Dr. Cotter holds a bachelor's degree in pharmacy from University College Cork, which he received with honors. He earned his medical degree with First Class Honors from the National University of Ireland in Galway. He then completed an internal medicine residency at the Mayo Clinic in Rochester, Minnesota, followed by advanced training in gastroenterology and transplant hepatology through fellowships at the University of Chicago Medical Center. He also holds a master's degree 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

Research Interest

  • Alcohol-associated Liver Disease
  • Liver Transplantation


Association between public health policies on alcohol and worldwide cancer, liver disease and cardiovascular disease outcomes
Díaz LA, Fuentes-López E, Idalsoaga F, Ayares G, Corsi O, Arnold J, Cannistra M, Vio D, Márquez-Lomas A, Ramirez-Cadiz C, Medel MP, Hernandez-Tejero M, Ferreccio C, Lazo M, Roblero JP, Cotter TG, Kulkarni AV, Kim W, Brahmania M, Louvet A, Tapper EB, Dunn W, Simonetto D, Shah VH, Kamath PS, Lazarus JV, Singal AK, Bataller R, Arrese M, Arab JP Journal of Hepatology 2024 Mar 80 409-418
The Authors' Reply
Anouti A, Patel MJ, Zhang BY, Singal AG, Mitchell MC, Cotter TG Transplantation 2024 Feb 108 E22
Hepatocellular Carcinoma Surveillance Patterns and Outcomes in Patients With Cirrhosis
Daher D, Seif El Dahan K, Cano A, Gonzales M, Ransom C, Jaurez E, Carranza O, Quirk L, Morgan T, Gopal P, Patel MS, Lieber S, Louissaint J, Cotter TG, VanWagner LB, Yang JD, Parikh ND, Yopp A, Rich NE, Singal AG Clinical Gastroenterology and Hepatology 2024 Feb 22 295-304.e2
A contemporary analysis of 20,086 deceased donor liver biopsies
Wang BK, Chen AY, Prasadh J, Desai D, Shubin AD, Raschzok N, MacConmara M, Ivanics T, Cotter T, Hwang C, Shah JA, Mufti A, Vagefi PA, Hanish SI, Patel MS World Journal of Surgery 2024 Feb 48 437-445
Racial and Ethnic Disparities in Liver Transplantation for Alcohol-associated Liver Diseases in the United States
Cotter TG, Mitchell MC, Patel MJ, Anouti A, Lieber SR, Rich NE, Arab JP, Díaz LA, Louissaint J, Kerr T, Mufti AR, Hanish SI, Vagefi PA, Patel MS, Vanwagner LB, Lee WM, O'Leary JG, Singal AG Transplantation 2024 Jan 108 225-234
Increasing practice and acceptable outcomes of high-MELD living donor liver transplantation in the USA
Anouti A, Patel MS, Vanwagner LB, Lee WM, Asrani SK, Mufti AR, Rich NE, Vagefi PA, Shah JA, Kerr TA, Pedersen M, Hanish S, Singal AG, Cotter TG Liver Transplantation 2024 Jan 30 72-82
Early Graft Failure After Living-Donor Liver Transplant
Anouti A, Al Hariri M, VanWagner LB, Lee WM, Mufti A, Pedersen M, Shah J, Hanish S, Vagefi PA, Cotter TG, Patel MS Digestive Diseases and Sciences 2024
Bifidobacteria metabolize lactulose to optimize gut metabolites and prevent systemic infection in patients with liver disease
Odenwald MA, Lin H, Lehmann C, Dylla NP, Cole CG, Mostad JD, Pappas TE, Ramaswamy R, Moran A, Hutchison AL, Stutz MR, Dela Cruz M, Adler E, Boissiere J, Khalid M, Cantoral J, Haro F, Oliveira RA, Waligurski E, Cotter TG, Light SH, Beavis KG, Sundararajan A, Sidebottom AM, Reddy KG, Paul S, Pillai A, Te HS, Rinella ME, Charlton MR, Pamer EG, Aronsohn AI Nature microbiology 2023 Nov 8 2033-2049
Biliary atresia and liver transplantation in the United States: A contemporary analysis
Anouti A, Patel MS, VanWagner LB, Lee WM, Fung JJ, Cholankeril G, Hwang CS, Mufti AR, Tujios S, Kerr T, Rich NE, Louissaint J, Desai DM, Vagefi PA, Hanish S, Shah J, Singal AG, Cotter TG Liver International 2023 Oct 43 2198-2209
Mortality and Morbidity Among Adult Liver Retransplant Recipients
Dakroub A, Anouti A, Cotter TG, Lee WM Digestive Diseases and Sciences 2023 Oct 68 4039-4049

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
  • American Society for Addiction Medicine (2019)