Faculty
Physician Listing
Welcome to the physician listing for the Department of Surgery. Start by choosing
the surgical division you are interested in and find the physicians listed for that
division. We are continually updating our physician information pages and will become
available as they are finished.
Professor and Interim Chairman: Ariel Santos, M.D.
Vice-Chairs: Steven E. Brooks, M.D., John A. Griswold, M.D., John Kidwell, MD, Dixon Santana, M.D., Mark Williams, M.D.
Surgery Divisions List:
Steven E. Brooks, M.D.
Associate Professor and Vice-Chair of Surgery,
Trauma/Critical Care
email: steven.brooks@ttuhsc.edu
John A. Griswold, M.D. 
Professor, Vice-Chair, and Chair Emeritus
Medical Director, Timothy J Harnar Burn Center
email: john.griswold@ttuhsc.edu
Jayne McCauley, M.D. 
Assistant Professor of Surgery
Trauma Medical Director
Trauma and Acute Care Surgery
email: jayne.mccauley@ttuhsc.edu
Alan Pang, M.D. 
Assistant Professor of Surgery
email: alan.pang@ttuhsc.edu
Robyn Richmond, M.D.
Associate Professor
mail: robyn.richmond@ttuhsc.edu
Ariel Santos, MD, MPH, FRSCS, FACS
Professor and Interim Chair of Surgery
email: ariel.santos@ttuhsc.edu
Bryce Stash, M.D. 
Assistant Professor of Surgery
Burn and Plastic Surgery
email: bryce.stash@ttuhsc.edu
Justin Vaughan, MD
Assistant Professor of Surgery
Covenant Acute Care
email: justin.vaughan@ttuhsc.edu
Steven E. Brooks, M.D.
Associate Professor and Vice-Chair of Surgery,
Director Trauma/Critical Care
email: steven.brooks@ttuhsc.edu
Vinay Goyal, M.D.
Assistant Professor of Surgery
Bariatric Surgery
email: vinay.goyal@ttuhsc.edu
Tres Haynes, MD
Assistant Professor of Surgery
email: tres.haynes@ttuhsc.edu
Tyler J Mouw, M.D.
Assistant Professor of Surgery
Surgical Oncology
email: tyler.mouw@ttuhsc.edu
Edwin Onserio Onkendi, MB. ChB.
Assistant Professor
Hepatobiliary Pancreatic Surgery
email: edwin.onkendi@ttuhsc.edu
Ariel Santos, MD, MPH, FRSCS, FACS
Professor and Interim Chair of Surgery
email: ariel.santos@ttuhsc.edu
Mohamad “Moe” Sidani , MD
Assistant Professor of Surgery, Endocrine Surgery
email: mohamad.sidani@ttuhsc.edu
Mark Williams, M.D.
Associate Professor and Vice-Chair
General Surgery
Interim Residency Program Director General Surgery
mail: mark.williams@ttuhsc.edu
Karla A Daniele, M.D. 
Assistant Professor of Surgery, Breast Surgery
Breast Cancer and Breast Disease
email: karla.daniele@ttuhsc.edu
Rakhshanda Layeequr Rahman M.D.; FRCS; FACS, M.D. 
Professor of Surgery
Breast Cancer and Breast Disease
email: rakhshanda.rahman@ttuhsc.edu
Thomas McGill, M.D.
Associate Professor of Surgery
Pediatric Surgery
email: thomas.mcgill@ttuhsc.edu
Ahmad Zaghal, M.D.
Associate Professor of Surgery
Pediatric Surgery
email: ahmad.zaghal@ttuhsc.edu
Benjamin Hirsch, M.D.
Assistant Professor of Surgery
Thoracic Surgery
email: benjamin.a.hirsch@ttuhsc.edu
Ralph Paone, M.D.
Assistant Professor of Surgery
Thoracic Surgery
email: ralph.paone@ttuhsc.edu
William Springer, M.D.
Assistant Professor of Surgery
Cardiothoracic Surgery
John Kidwell, MD
Assistant Professor of Surgery
Colorectal Surgery
email: john.kidwell@ttuhsc.edu
Collin Gandillon, M.D.
Assistant Professor of Surgery
Vascular Surgery
email: collin.gandillon@ttuhsc.edu
Benjamin Hirsch, M.D.
Assistant Professor of Surgery
Thoracic Surgery
email: benjamin.a.hirsch@ttuhsc.edu
Dixon Santana, M.D.
Professor and Vice-Chair, Department of Surgery
Director of Surgical Simulation Laboratory
email: dixon.santana@ttuhsc.edu
William Springer M.D.
Assistant Professor of Surgery
Cardiothoracic Surgery
Bryce Stash, M.D.
Assistant Professor of Surgery
Burn and Plastic Surgery
email: bryce.stash@ttuhsc.edu
Ben Baronia, M.D.
Assistant Professor of Surgery
Neurosurgery
email: ben.c.baronia@ttuhsc.edu
Muhittin Belirgen, M.D.
Assistant Professor of Surgery
Neurosurgery
email: muhittin.belirgen@ttuhsc.edu
Usiakimi Igbaseimokumo, M.D.
Associate Professor, Pedi Administration
Pediatric Neurosurgery
email: Usiakimi.Igbaseimokumo@ttuhsc.edu
Jason Felton, M.D.
Assistant Professor of Surgery
Neurosurgery
email: jason.felton@ttuhsc.edu
Geneviéve LaPointe, M.D.
Assistant Professor of Surgery
Neurosurgery
email: genevieve.lapointe@ttuhsc.edu
Laszlo Nagy, M.D.
Professor of Surgery
Pediatric Neurosurgery
email: laszlo.nagy@ttuhsc.edu
Mohamad “Moe” Sidani , MD
Assistant Professor of Surgery, Endocrine Surgery
email: mohamad.sidani@ttuhsc.edu
Jocelyn Adams, FNP-C
Nurse Practitioner
Department of Surgery
Burn
email:jocelyn.adams@ttuhsc.edu
Matthew Cox, PA
Physician Assistant
Department of Surgery
Trauma/General Surgery
email: matthew.cox@ttuhsc.edu
Laura Durrett, NP 
Nurse Practitioner
Department of Surgery
Trauma/General Surgery
email: laura.durrett@ttuhsc.edu
Sarah Felan, FNP
Nurse Practitioner
Department of Surgery
Burn
email: sarah.felan@ttuhsc.edu
Michael Garcia, FNP
Nurse Practitioner
Department of Surgery
Trauma/General Surgery
email: michael.garcia3@umchealthsystem.com
Daviin Harewood, FNP-C
Nurse Practitioner
Department of Surgery
Trauma/General Surgery
email: daviin.harewood@ttuhsc.edu
Lindsey Turner Mireles, FNP
Family Nurse Practitioner
Department of Surgery
email: lindsey.mireles@umchealthsystem.com
Joshua Reyes, PA
Physician Assistant
Department of Surgery
Trauma/General Surgery
email: rey03299@ttuhsc.edu
Cole Vinyard, NP
Nurse Practitioner
Department of Surgery
Trauma/General Surgery
cole.vinyard@ttuhsc.edu
Robyn Richmond, M.D.
Program Director
mail: robyn.richmond@ttuhsc.edu
Mark Williams, M.D.
Vice Chair of Education
mail: mark.williams@ttuhsc.edu
Edwin Onserio Onkendi, MB. ChB.
Assistant Program Director
email: edwin.onkendi@ttuhsc.edu
Mohamad “Moe” Sidani, M. D.
Assistant Program Director
email: mohamad.sidani@ttuhsc.edu
Justin Vaughan, M. D.
Assistant Program Director
email: Justin.Vaughan@ttuhsc.edu@ttuhsc.edu
Huan Vu, M.D.
Assistant Program Director
email: huan.n.vu@ttuhsc.edu