What We Do

Research Focus

We have a solid volunteer database and work with over 70 referring physicians in the area to meet target enrollment goals on time. Patient safety and care is our top priority. We conduct clinical trials the following areas:

  • Non-alcoholic fatty liver disease
  • Hepatitis B and C
  • Primary biliary cholangitis (PBC)
  • Primary sclerosis cholangitis (PSC)
  • Portal hypertension
  • Ulcerative colitis
  • Crohn’s disease
  • Gastroparesis
  • Bowel preparation
  • Other hepatic and GI diseases and conditions


  • Two locations in the San Antonio area an one location in Austin
  • Dedicated patient rooms for research activities
  • In-house dedicated research laboratory for processing and shipping, capable of conducting CLIA waived tests
  • Ability to use central IRBs designated by the study sponsor
  • FibroScan on-site
  • Wireless temperature monitoring system with alarms and alert notification for ambient, cold and frozen storage for biological samples and drug supply
  • Controlled access document storage space

Stephen A Harrison, MD

Gastroenterologist Hepatologist Specializing in Liver Disease

Led by our Medical Director, Dr. Stephen Harrison, Pinnacle has five board-certified investigators involved with the daily oversight of clinical trials. Our coordinating team consists of six Clinical Research Coordinators and Research Assistants with extensive experience in conducting all phases of clinical trials. Our quality control, and regulatory team work with sponsors to ensure the highest quality of data collection and documentation, according the good clinical practices and the FDA regulations for every trial.