Current Fellows

Nicholas Norris, M.D.

Education
B.S., Baylor University, Waco, TX, 2014
M.D., UT Southwestern Medical School, 2018
Postdoctoral Training
UT Southwestern & Children’s Health, Pediatric Residency, 2018–2021

• Research

  Impact of Pooled Versus Regional Biopsies in Pediatric Colonoscopy

• Mentor

  Mentor: David Troendle, M.D.

• Testimonial

  “Training at UTSW has been a joy. The diversity of GI subspecialities is fun to explore and definitely helps round out our general GI knowledge. I consider myself privileged to see the array of gastrointestinal pathology we're exposed to on a daily basis, and lucky to work with experts in the field, who I feel have made me a better doctor and will help me take the best care of my patient moving forward.”

Liane Sadder, M.D.

Education
B.S., American University of Beirut, Lebanon, 2013
M.D., American University of Beirut, Lebanon, 2017
Postdoctoral Training
UT Southwestern & Children’s Health, Pediatric Residency, 2018–2021

• Research

  Impact of Neonatal Antibiotic Exposure on Gastric Motility

• Mentor

  Mentor: Erik Ortigoza, M.D.

Tiffany Freeney Wright, M.D.

Education
B.S. (Magna Cum Laude), Auburn University, Auburn, AL, 2013
M.D., University of Alabama at Birmingham School of Medicine, Birmingham, AL, 2018
Postdoctoral Training
University of Tennessee School of Health Sciences, Memphis, TN, Pediatric Residency, 2018–2021

• Research

  Role of Colonic Enteroendocrine Cells in Weight and Glycemic Control

• Mentor

  Mentor: Luis Sifuentes-Domínguez, M.D.

Claudia Moreda Rivero, M.D.

Education
B.S., University of Puerto Rico, Río Piedras, PR, 2014
M.D., Universidad Central del Caribe (UCC) School of Medicine, Bayamon, PR, 2019
Postdoctoral Training
University of Puerto Rico School of Med Children’s Hospital Dr. Antonio Ortiz, San Juan, PR, Pediatric Residency, 2019–2022

• Testimonial

  “My experience as a first-year pediatric gastroenterology fellow has been one of immense learning. Being able to train at a major pediatric referral center in the area gives me the opportunity to learn from a great variety of pathologies and allows me to be exposed to multiple different procedures. I will be forever grateful to my past mentors that have helped me become the person I am today, and to my current ones that in this short time have taught me so much about the GI world. You would never regret becoming part of the UTSW family!”

Justin Williams, M.D.

Education
B.S., University of Texas at Austin, Austin, TX, 2014
M.D., Texas Tech University Health Sciences Center School of Medicine, Lubbock, TX, 2019
Postdoctoral Training
UT Southwestern, Pediatric Residency, 2019–2022, Chief Resident, 2022–2023