Gastro Florida

Center Information

Shannon Brewington
Lead CRC
Gastro Florida
508 Jeffords St, Suite D
Clearwater, FL 33762
727-347-0536, 727-336-7682 (cell)

Currently Enrolling Trials

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Therapeutic Areas

Hepatology (Liver, Pancreatic, Gall Bladder)
Internal Medicine
Nutrition and Weight Loss


Gastro Florida was formed in September 2010 from 8 local independent gastroenterology groups. Today we are the largest gastroenterology practice in the Tampa Bay, Florida region with 20 locations in Hillsborough, Pinellas, and Pasco counties. We believe in affability, affordability, access, answers, and accuracy. Our physicians have often been the first to bring new GI treatments to the Tampa Bay community.

Gastro Florida's locations serve the following regions:

  • Clearwater
  • Pinellas Park
  • Palm Harbor/Safety Harbor
  • Westchase
  • Tampa


Preferred phases 2, 3, 4

Therapeutic areas:

  • Barrett's esophagus
  • Constipation
  • Crohn's disease
  • Esophageal disorders
  • Gastroesophageal Reflux Disease (GERD)
  • Gastrointestinal diseases and disorders
  • Gastroparesis
  • Hepatitis C; chronic
  • Inflammatory bowel disease
  • Irritable bowel syndrome (IBS)
  • Liver disease
  • Ulcerative colitis
  • Gall bladder disorders
  • Liver disorders
  • Pancreatic disorders
  • Colon cancer screenings


Our gastroenterology practice consists of 20 outpatient clinics in the Tampa Bay, Florida region. Our physicians also have privileges at nearly all bay-area hospitals. We offer groundbreaking techniques, diagnostic strategies, advanced endoscopy/ultrasound and ECRP, colon cancer screenings, nonsurgical cancer intervention, and minimally invasive endoscopic therapies.


L. Michael Weiss, M.D. is Board Certified by the American Board of Internal Medicine in Internal Medicine and the subspecialty of Gastroenterology. He was born in Flushing, New York. He received a bachelor of arts from Brandeis University and his M.D. from New York Medical College. He did his internal medicine residency and gastroenterology fellowship at Emory University. He came to Clearwater in 1995 to join in practice with Gastroenterology Consultants of Clearwater. He is a past chairman of the gastroenterology department at Morton Plant Hospital. He is very active in clinical research and has been the principal investigator on over 50 gastrointestinal studies. He is actively involved with many charities and is on the board of directors of the Florida chapter of The Children's Heart Foundation.

Alfredo Mendoza, M.D. is Board Certified in Internal Medicine, Gastroenterology, Transplant Hepatology and has been in practice for more than 20 years. He completed his Internal Medicine residency and Gastroenterology fellowship at Penn State Hershey Medical Center. He also completed fellowship training in Hematology at the Queen Elizabeth Hospital in Birmingham, United Kingdom. In addition he also holds a Master's Degree in Health Evaluation Sciences from Penn State University. Dr. Mendoza joined Gastro Florida from Tampa General Hospital and has broad experience in clinical management of patients with Gastrointestinal and Liver diseases. He is fluent in Spanish and English.


Shannon Brewington, is the Lead Clinical Research Coordinator of Gastro Florida and has 11 years of experience in clinical research. She is the contact person for new study inquiries. We also have a dietitian on staff.


We see adult patients from Hillsborough, Pinellas, and Pasco counties. Patient recruitment comes directly from our EMR database and is queried according to the specifications for each protocol providing real time feasibility data.


Additional locations:

11912 Sheldon Rd.
Tampa, FL 33626

Central Business Office
Gastro Florida
3001 Executive Dr. Suite 130
Clearwater, FL 33762

Contact Center

If you are interested in contacting this center to discuss clinical trials, please complete and send the email form below. A representative from the research center will then follow up with you.