Stephen A. Harrison, M.D.



12850 Toepperwein Road

Live Oak, TX 78233

Open today 8 AM - 5 PM

Quick Facts

  • Virtual Telemedicine Visits Available, Call For Details
  • Board Certified Gastroenterologist
  • Currently Accepting New Patients
  • Most Insurance Plans Accepted
  • Performs Colonoscopies

Gastro Consultants of SA - San Antonio, TX - Northeast

Gastroenterology in Live Oak, TX

Gastro Consultants of SA - San Antonio, TX - Northeast

12850 Toepperwein Road

Live Oak, TX 78233

Open today 8 AM - 5 PM

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If you are experiencing a medical emergency, please call 9-1-1. This form is intended for non-urgent appointment requests only. Non-emergency requests will be responded to within 24-48 hours.

About Stephen A. Harrison, M.D.

Dr. Stephen A. Harrison is the Medical Director of Pinnacle Clinical Research. He earned his medical degree from the University Of Mississippi School Of Medicine. He completed his Internal Medicine residency and Gastroenterology fellowship at Brooke Army Medical Center and a 4th-year advanced liver disease fellowship at Saint Louis University. He is board-certified in both Internal Medicine and Gastroenterology. Dr. Harrison served as a Professor of Medicine at the Uniformed Services University of the Health Sciences and is currently a Visiting Professor of Hepatology at the Radcliffe College of Medicine, University of Oxford. He is a past Associate Editor for Hepatology and is currently an Associate Editor for Alimentary Pharmacology and Therapeutics. He is a peer-reviewer for over 20 medical journals and internationally known for studies in hepatitis C and non-alcoholic fatty liver disease with over 150 peer-reviewed publications in these fields. Dr. Harrison most recently served as a Colonel in the United States Army. Retiring in 2016, he concluded 20 years of dedicated service to his country. During his army tenure, he served as the Director of Graduate Medical Education at Brooke Army Medical Center, Associate Dean for the San Antonio Uniformed Services Health Education Consortium and Gastroenterology Consultant to the Army Surgeon General.

Bachelor’s Degree

  • University of Mississippi, Oxford, Mississippi, 1991

Medical Degree

  • University of Mississippi School of Medicine, Jackson, Mississippi, 1995

Internal Medicine Internship

  • Brooke Army Medical Center, Fort Sam Houston, Texas, 1995-1996

Internal Medicine Residency

  • Brooke Army Medical Center, Fort Sam Houston, Texas, 1996-1998

Gastroenterology Fellowship

  • Brooke Army Medical Center, San Antonio, Texas, 1999-2002

Hepatology Fellowship

  • St. Louis University, St. Louis, Missouri, 2002-2003

Board Certification

  • Internal Medicine: 1998, 2012
  • Gastroenterology: 2002, 2012

Faculty Appointments

  • Instructor, St. Louis University School of Medicine, St. Louis, Missouri, 2002-2003
  • Clinical Assistant Professor, University of Texas Health Science Center at San Antonio, San Antonio, Texas, 2003-2007
  • Adjunct Associate Professor, University of Texas Health Science Center at San Antonio, San Antonio, Texas, 2007-2012
  • Professor of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, 2012-2016
  • Visiting Professor of Hepatology, University of Oxford, Oxford, England, 2016-Current
  • Program Director, GI Fellowship, Brooke Army Medical Center, San Antonio, Texas, 2009-2013
  • Consultant to the Surgeon General for Gastroenterology, San Antonio, Texas, 2011-2016

Awards and Accreditation:

Honors & Awards

  • RADM Dennis Wright Military Medical Student of the Year Award, 1995
  • Outstanding Junior Resident Award, 1997
  • First Place Podium Presentation, National Army ACP Meeting, Washington, DC, 1997
  • John L. Carpenter Award Outstanding Resident Paper, 1998
  • Chief of Residents, Brooke Army Medical Center, 1998-1999
  • AASLD/Schering Advanced Hepatology Fellowship Scholarship, 2002
  • Jay P. Sanford Award – Best Fellow Research Presentation, National AF ACP Meeting, San Antonio, TX, 2002
  • The William Beaumont Clinical Research Award, 2003, 2007-2008
  • Key Clinical Faculty- Brooke Army Medical Center, Department of Medicine, 2005-Current
  • Gastroenterology Core Curriculum Revision Committee (1 of 8 members throughout the country), 2005
  • Research Excellence in GI and Liver (REGAL) national award recipient, 2006
  • Order of Military Medical Merit, 2007
  • Colonel William Crosby Superiority in Research Award: Army Chapter, American College of Physicians, 2008
  • Guest Editor: Clinics in Liver Disease, November Issue, 2009: Nonalcoholic Steatohepatitis
  • Section Editor x 7 issues: Current Hepatitis Reports
  • Recipient of the “A” proficiency designator, April, 2010
  • Reviewer- NIH-Special Emphasis Panel/Scientific Review Group 2012/08 ZAA1 JJ
  • Best Doctors List, SA Scene Magazine, 2017


Dr. Harrison is an exceptional doctor. The likes of him are very rare these days. I NEVER have to wait and when he comes into the room for the appointment , he makes you feel like you are his only patient for the day. He takes his time with you, addresses any questions you might have and explains everything. He is absolutely one of the best doctors I have ever had.

K.H. Google

Dr Harrison is very knowledgeable and thorough. I have been his patient for about I think 5 years and every visit is like a one on one and not just a number. He explains every diagnosis and helps you to understand it. I always look forward to my visits. I highly recommend him.

R.M. Google

Working with Dr Harrison and staff have been an absolute comfortable experience. They are very knowledgeable to each persons needs as well as their families. Very valuable team to have for health care.

M.C. Google

Dr. Harrison is an exceptional doctor. I have been his patient for about 5 years. He explains your diagnosis and helps you to understand very patiently. I highly recommend Dr. Harrison

C.G. Google

Dr. Harrison is an excelent doctor, patient , he listened, he is kind good dr.

E.V. Google


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