Meet our Residents

AM Year 2

Vasilis Mavratsas, MD

PGY-4
Internal Medicine/Aerospace Medicine
Brian Rodriguez, MD

PGY-4
Internal Medicine/Aerospace Medicine
Ethan Stephens, DO

PGY-5
Prior Training: Family Medicine
Chief Resident
Christine Schwartz, MD

PGY-5
Prior Training: Internal Medicine/ Wilderness Medicine
Andrew Lam, MD

PGY-5
Prior Training: Family Medicine

AM Year 1

Samuel Stephenson, MD

PGY-3
Internal Medicine/Aerospace Medicine
Daniel Cox, MD
PGY-4
Prior Training: Emergency Medicine

Combined Residents

Clare McNerlin, MD

PGY-2
Emergency Medicine/Aerospace Medicine
Daniel Kaganov, MD

PGY-2
Emergency Medicine/Aerospace Medicine
Collins, Wendy
Wendy Collins, MD

PGY-1
Emergency Medicine/Aerospace Medicine
Nowitz, Joshua
Joshua Nowitz, MD

PGY-1
Emergency Medicine/Aerospace Medicine

Recent Graduates

2025

Matthew Makowski, MD, PhD, MS: Aerospace Medicine; Internal Medicine; Pulmonary Diseases & Critical Care Medicine; Undersea and Hyperbaric Medicine  
Placement: UTMB/KBR/NASA Johnson Space Center

Jeffrey McBride, MD, MS: Aerospace Medicine; Psychiatry
Placement: Houston Psychiatry

Samantha King, MD, MS: Aerospace Medicine; Emergency Medicine/Ultrasound
Placement: Federal Aviation Administration Headquarters

2024

Rebecca Mendelsohn, MD, MPH: Aerospace Medicine; Emergency Medicine
Placement: UTMB/KBR/NASA Johnson Space Center

Craig Kutz, MD, PhD, MPH: Aerospace Medicine; Emergency Medicine
Placement: UTMB/KBR/NASA Johnson Space Center

Isaiah Reeves, MD, MPH: Aerospace Medicine; Internal Medicine
Placement: Axiom Space, Inc.

Michael LaBarbera, MD, PhD, MPH: Aerospace Medicine; Internal Medicine
Placement: Aerospace Medicine Consultant; Internal Medicine

2023

Kristi Ray, DO, MPH: Aerospace Medicine; Family Medicine; Undersea and Hyperbaric Medicine  
Placement: UTMB/KBR/NASA Johnson Space Center


Karen Ong, MD, PhD, MPH: Aerospace Medicine; Internal Medicine
Placement: Virgin Galactic

Lt Col Bashir El-Khoury, MD, MPH: Aerospace Medicine; Internal Medicine; Nephrology
Placement: US Air Force

Lt Col Brian Hanshaw, DO, MPH: Aerospace Medicine; Family Medicine
Placement: US Air Force, MacDill AFB

2022

William Fernandez, MD, MPH: Aerospace Medicine; Emergency Medicine
Placement: UTMB/KBR/NASA Johnson Space Center

Quinn Dufurrena, MD, MPH: Aerospace Medicine; Internal Medicine
Placement: UTMB/KBR/NASA Johnson Space Center

John Marshall, MD, MPH: Aerospace Medicine; Internal Medicine
Placement: Axiom Space, Inc.

Michael Rhode, MD, MBA, MPH: Aerospace Medicine; Internal Medicine/Clinical Pathology
Placement: US Air Force

2021

Michelle Hong Chan, MD, PharmD, MPH: Preventive Medicine- Aerospace; Emergency Medicine
Placement: Axiom Space, Inc.

William Valencia, MD, MPH: Preventive Medicine- Aerospace; Family Medicine
Placement: UTMB/KBR/NASA Johnson Space Center

Contacts

Aerospace Medicine Residency 
University of Texas Medical Branch
301 University Boulevard
Galveston, Texas 77555-1150

Phone: (409) 747-6131
Email: AerospaceMed@utmb.edu

Professional photo of Amy Kreykes, MD, MPH
Amy Kreykes, MD, MPH
Program Director
Aerospace Medicine

Professional photo of Yvette Schulz
R. Yvette Schulz, MBA
Program Manager
Aerospace Medicine
ryschulz@utmb.edu