Alumni Fellows Leadership and Faculty
Apply at ERAS

Program leadership

Raymond Gene Duggan, DO
Program Director

Specialties: Gastroenterology

Christopher Williams, MD, FACG
Associate Program Director

Specialties: Gastroenterology

Faculty

Charlene A. V. Hauser, D.O.
Core Faculty

Specialties: Gastroenterology

Murali Jatla, MD
Core Faculty

Specialties: Pediatric Gastroenterology

Mark Alan Jeffries, DO
Core Faculty

Specialties: Gastroenterology, Internal Medicine

Christopher Johnson, MD, PhD
Division Director

Specialties: Gastroenterology

Christopher Naumann, MD
Core Faculty

Specialties: Gastroenterology

Jonathan Charles Ramirez, MD
Core Faculty

Specialties: Gastroenterology, Internal Medicine

Jonathan Robert Ramprasad, MD
Core Faculty

Specialties: Pediatric Gastroenterology

James T. Sing, Jr., DO, FACG, AGAF
Core Faculty

Specialties: Gastroenterology

Niket Sonpal, MD, FACP, DABIM
Core Faculty

Specialties: Gastroenterology

Cicily Vachaparambil, MD
Core Faculty

Specialties: Gastroenterology

Jennifer L. Vincent, DO
Core Faculty

Specialties: Gastroenterology, Hepatology

Duc Hoai Vu, MD
Core Faculty

Specialties: Gastroenterology

Fellows

PGY-6

Michael Mullarkey, MD
Paul L. Foster School of Medicine, Texas Tech University

PGY-5

Luke Kennedy, MD
University of Texas Health Science Center/Mcgovern Med School

PGY-4

Anupama Ancha, MD
St. George's University School of Medicine
Daniel Davis, MD
Texas Tech University Health Sciences Center School of Medicine
Boris Zhong, DO
Kansas City University of Medicine & Biosciences College of Osteopathic Medicine

Alumni

2020-2023 graduates

Marcus Samuel Davis, DO
Hendrix Medical Center
Abilene, TX
Victoria Allison Jaeger, DO
Private Practice
Boise, Idaho
Namisha Thapa, DO
Baylor Scott & White Health
McKinney, TX
 

2018-2021 graduates

Teresa C. Yanchak, MD
Hendrix Medical Center
Abilene, TX
Kenneth W. Coggins, MD
Baylor Scott & White Health
McKinney, TX
Shamyal Hasan Khan, DO
Waco Gastroenterology Group
Waco, TX
Teresa C. Yanchak, MD
Private Practice
Colorado Springs, CO
Kenneth W. Coggins, MD
Private Practice
Little Rock, AR
Gurkarminder K. Sandhu, MD
Baylor Scott & White Health
McKinney, TX
 

2017-2020 graduates

Jessica L. Garner, DO
Christus Good Shepherd Health System
Longview, TX
Juan P. Diocare, MD
Private Practice
San Marcos, TX
Hannah E. Jones, DO
Private Practice
Knoxville, TN
 

2016-2019 graduates

Samir Nadeem Ashfaq, MD
Private practice
Katy, TX
Mario De Los Santos, III, MD
Baylor Scott & White Health
Bryan/College Station, TX
Priyanka Pankaj Patel, MD
University Hospital
Cleveland, OH
 

2015-2018 graduates

John Alvarez, MD
Private Practice
San Antonio, TX
Alisha Hinds, DO
Private Practice
Jefferson City, MO
Kayla Sliman, MD
Private Practice
Baton Rouge, LA
 

2014-2017 graduates

Christopher Johnson, MD
Baylor Scott & White Health
Temple, TX
Joshua Stagg, MD
Private Practice
Wichita Falls, TX
Michelle B. Thompson, DO
Private Practice
Olympia, WA
 

2013-2016 graduates

Ed Dauterive, MD
Private Practice
Louisiana
Henry Herrera, MD
Private Practice
McAllen, TX
Scott Swendsen, MD
Private Practice
Colorado
 

2012-2015 graduates

Jonathan Ramirez, MD
Academic
Temple, TX
Levi Hubble, MD
Private Practice
San Angelo, TX
Salman Hasan, MD
Private Practice
Plano, TX
 

2011-2014 graduates

Nancy Behazin, MD
Private Practice
Houston, TX
David Case, MD
Private Practice
Bryan, TX
Kinan Rahal, MD
Private Practice
Columbia, SC
Moazzam Sana, DO
Private Practice
Beaumont, TX
 

2010-2013 graduates

Jason Huffman, MD
VA
North Carolina
 

2009-2012 graduates

Tim Miller, MD
Private Practice
Lubbock, TX
Dan Cohen, MD
Private Practice
Austin, TX
 

2008-2011 graduates

Anu Duddempudi, MD
Private Practice
New York
Geoffrey Fillmore, DO
Private Practice
Tulsa, OK
Aris Tsiakos, MD
Private Practice
Plano, TX
 

2007-2010 graduates

Andrew Cody Bolin, MD
Private Practice
Plano, TX
John W. McDonald, MD
Private Practice
Baton Rouge, LA
 

2006-2009 graduates

Raymond Duggan, DO
Academic
Temple, TX
Jennifer Vincent, DO
Academic
Temple, TX
 

2005-2008 graduates

Duc Vu, MD
Academic
CTemple, TX
Katherine Nguyen, MD
Private Practice
Houston, TX
 

2004-2007 graduates

Brandon Conkling, DO
Private Practice
Tulsa, OK
Peter Naus, MD
Private Practice
Arlington, TX
 

2003-2006 graduates

James Lusby, MD
Private Practice
Amarillo, TX
Virat Dave, MD
Private Practice
Ft. Worth, TX
 

2002-2005 graduates

Trent Horst, DO
Private Practice
Oklahoma City, OK
David Lee, MD
Private Practice
Lincoln, NE
 

2001-2004 graduates

Dawn M. Sears, MD
Academic
Temple, TX
Boyed S. Fenton, MD
Private Practice
Lubbock, TX
 

2000-2003 graduates

James T. (Tommy) Sing, DO
Academic
Temple, TX
Tim McClellan, MD
Private Practice
Witchita Falls, TX
 

1999-2002 graduates

Drew Crawford, DO
Private Practice
Tulsa, OK
Barry Perkins, MD
Private Practice
Oklahoma City, OK