What We Do

What We Do

Research Focus

We have a solid volunteer database and work with over 80 referring physicians in the area to meet target enrollment goals on time. Patient safety and care is our top priority. We conduct clinical trials in 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


  • One location in San Antonio and another 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 two full-time board-certified investigators involved in the daily oversight of clinical trials. Our coordinating team consists of fifteen Clinical Research Coordinators and Research Assistants with extensive experience in conducting all phases of clinical trials. Our quality control and regulatory teams work with sponsors to ensure the highest quality data collection and documentation for every trial, according to best clinical practices and FDA regulations.