Critical Care Medicine Fellows
Third-Year Fellows (2020-2023)

Nicolle Diaz, M.D.
Education
M.D., Universidad del Norte, Barranquilla, Colombia, 2015
Postdoctoral Training
Nicklaus Children's Hospital, Miami, FL, Pediatric Residency, 2017–2020
- Research Project
Automated pupillometry for prediction of neurologic outcomes in children requiring extracorporeal membrane oxygenation (ECMO)

Ali Hasan, M.B.B.S.
Education
M.B.B.S., Aga Khan University, Karachi, Pakistan, 2014
Postdoctoral Training
Texas A&M College of Medicine, Driscoll Children's Hospital, Corpus Christi, TX, Pediatric Residency, 2016–2019, Chief Resident, 2019–2020
- Research Project
Retrospective analysis of prevalence, type and neurodevelopmental outcomes of seizures in infants with non-accidental traumatic brain injuries

Matt Naumann, M.D.
Education
B.S., Baylor University, Waco, TX, 2012
M.D., Johns Hopkins University School of Medicine, Baltimore, MD, 2017
Postdoctoral Training
American Family Children's Hospital, University of Wisconsin, Madison, WI, Pediatric Residency, 2017–2020
- Research Project
National Trends in Critical Asthma Severity During the Covid-19 Pandemic

Prashanth Shanmugham, M.D.
Education
B.S., University of Florida, Gainesville,FL, 2011
M.D., Florida International University Herbert Wertheim College of Medicine, Miami, FL, 2017
Postdoctoral Training
University of Florida School of Medicine, Gainesville, FL, Pediatric Residency, 2017–2020
- Research Project
Utilizing Machine Learning to Predict Low Cardiac Output Syndrome in Neonatal and Pediatric Patients Following Cardiopulmonary Bypass

Natalia Soulages Arrese, M.D.
Education
B.S., Oklahoma State University, Stillwater, OK, 2012
M.D., University of Oklahoma, College of Medicine, Oklahoma City, OK, 2016
Postdoctoral Training
University of Oklahoma Health Sciences Center, Oklahoma City, OK, Pediatric Residency, 2016–2019, Chief Resident, 2019–2020
- Research Project
Implementation of Fluid Overload Prevention Initiative in Pediatric Intensive Care Unit

Natalia Testo, D.O.
Education
B.S. (Magna Cum Laude), Loyola University Maryland, Baltimore, MD, 2011
D.O. (with Honors), University of North Texas Health Science Center, Ft. Worth, TX, 2016
Postdoctoral Training
Bernard and Millie Duker Children's Hospital, Albany Medical Center, Albany, NY, Pediatric Residency, 2016–2019, Chief Resident, 2019–2020
- Research Project
Hyperthermia after ischemic and traumatic brain injury in children: Frequency and duration of hyperthermia and effect on neurologic outcomes
Second-Year Fellows (2021-2024)

Nicholas Bartel, M.D., M.P.H.
Education
B.S., University of Alabama, Tuscaloosa, AL, 2011
M.D., M.P.H., Louisiana State University Health Sciences Center, New Orleans, LA, 2016
Postdoctoral Training
Indiana University School of Medicine, Indianapolis, IN, Pediatric Residency, 2016–2020

Chasity Custer, M.D.
Education
B.S., West Virginia University Maryland, Morgantown, WV, 2014
M.D., West Virginia University Maryland, Morgantown, WV, 2018
Postdoctoral Training
Texas Children's Hospital, Baylor College of Medicine, Houston, TX, Pediatric Residency, 2018–2021

Zachary Hodges, M.D.
Education
B.S., University of Georgia, Athens, GA, 2013
M.D., Medical College of Georgia at Augusta University, Augusta, GA, 2017
Postdoctoral Training
Medical College of Georgia at Augusta University, Augusta, GA, Pediatric Residency, 2017–2020

Lisa Settle, D.O.
Education
B.S., University of Kentucky, Lexington, KY, 2013
M.B.A., Rockhurst University, Kansas City, MO, 2018
D.O. Kansas City University of Medicine and Biosciences, Kansas City, MO, 2018
Postdoctoral Training
University of Oklahoma Health Sciences Center, Oklahoma City, OK, Pediatric Residency, 2018–2021
First-Year Fellows (2022-2025)

Meredith DeCoy D.O.
Education
B.S. (Cum Laude), University of Cincinnati, Cincinnati, OH, 2014
M.S., University of Cincinnati-College of Medicine, Cincinnati, OH, 2015
D.O., Ohio University-Heritage College of Osteopathic Medicine, Athens, OH, 2019
Postdoctoral Training
Akron Children’s Hospital, Akron, OH, Pediatric Residency, 2019–2022

Valerie Pallos D.O.
Education
B.A., New York University, New York, NY, 2011
D.O., New York Institute of Technology College of Osteopathic Medicine, Old Westbury, NY, 2018
Postdoctoral Training
Maimonides Medical Center, Brooklyn, NY, Pediatric Residency,2018–2022, Chief Resident, 2021–2022

Jesseca Paulsen M.D.
Education
B.S. (Magna Cum Laude), The University of Alabama, Tuscaloosa, AL, 2014
M.D., University of Alabama School of Medicine, Birmingham, AL, 2018
Postdoctoral Training
University of Alabama at Birmingham, Birmingham, AL, Pediatrics Residency, 2018–2021
Contact Us

Associate Professor
Program Director, Pediatric Critical Care Fellowship Program
michael.green@utsouthwestern.edu
Clinical Associate Professor
Associate Program Director, Pediatric Critical Care Fellowship Program
samuel.davila@utsouthwestern.edu
Assistant Professor
Associate Program Director, Pediatric Critical Care Fellowship Program
olivia.hoffman@utsouthwestern.edu
Assistant Professor
Associate Program Director, Pediatric Critical Care Fellowship Program
anna.silberman@utsouthwestern.edu