| Desert Sun Clinical Research, LLC | Tucson | Arizona | 85710 | - |
| Desert Sun Gastroenterology | Tucson | Arizona | 85710 | - |
| Desert Sun Surgery Center | Tucson | Arizona | 85710 | - |
| Alliance Clinical Research | Oceanside | California | 92056 | - |
| Clinical Application Laboratories | San Diego | California | 92103 | - |
| San Diego Endoscopy Center | San Diego | California | 92103 | - |
| UCSF Endoscopy Unit at Mount Zion | San Francisco | California | 94115 | - |
| University of California San Francisco | San Francisco | California | 94115 | - |
| Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center | Torrance | California | 90502 | - |
| Bristol Hospital | Bristol | Connecticut | 06010 | - |
| Connecticut Clinical Research Foundation | Bristol | Connecticut | 06010 | - |
| Yale New Haven Hospital | New Haven | Connecticut | 06510 | - |
| Yale University School of Medicine | New Haven | Connecticut | 06510 | - |
| Central Connecticut Endoscopy Center | Plainville | Connecticut | 06062 | - |
| Citrus Surgery & Endoscopy Center (Colonoscopy) | Crystal River | Florida | 34429 | - |
| Nature Coast Clinical Research | Inverness | Florida | 34452 | - |
| Suncoast Endoscopy Center (colonoscopy) | Inverness | Florida | 34453 | - |
| Gastroenterology Group of Naples | Naples | Florida | 34102 | - |
| Advanced Gastroenterology Center | Port Orange | Florida | 32127 | - |
| Advanced Medical Research Center | Port Orange | Florida | 32127 | - |
| Endoscopy Center | Port Orange | Florida | 32127 | - |
| Port Orange Urgent Care | Port Orange | Florida | 32127 | - |
| Atlanta Center for Gastroenterology, P.C. | Decatur | Georgia | 30033 | - |
| Cotton-O'Neil Clinical Research Center, Digestive Health | Topeka | Kansas | 66606 | - |
| Gastrointestinal Specialists, A.M.C. | Shreveport | Louisiana | 71103 | - |
| Louisiana Research Center, LLC | Shreveport | Louisiana | 71105 | - |
| Shreveport Endoscopy Center, A.M.C. | Shreveport | Louisiana | 71103 | - |
| Chevy Chase Endoscopy Center (Endoscopies Only) | Chevy Chase | Maryland | 20815 | - |
| MGG Group Co., Inc., Chevy Chase Clinical Research | Chevy Chase | Maryland | 20815 | - |
| Clinical Research Institute of Michigan, LLC | Chesterfield | Michigan | 48047 | - |
| Center for Digestive Health | Troy | Michigan | 48098 | - |
| Surgical Centers of Michigan | Troy | Michigan | 48098 | - |
| Mayo Clinic | Rochester | Minnesota | 55905 | - |
| Surgery Center of Columbia | Columbia | Missouri | 65201 | - |
| Hannibal Regional Hospital | Hannibal | Missouri | 63401 | - |
| Audrain Medical Center | Mexico | Missouri | 65265 | - |
| Center for Digestive & Liver Disease, Inc. | Mexico | Missouri | 65265 | - |
| Dartmouth-Hitchcock Medical Center | Lebanon | New Hampshire | 03756 | - |
| AGA Clinical Research Associates, LLC | Egg Harbor | New Jersey | 08234 | - |
| South Jersey Gastroenterology | Marlton | New Jersey | 08053 | - |
| The Gastroenterology Group of South Jersey | Vineland | New Jersey | 08360 | - |
| The Endo Center at Voorhees | Voorhees Township | New Jersey | 08043 | - |
| University of Rochester | Rochester | New York | 14642 | - |
| Carolina Research - Carolina Digestive Diseases | Greenville | North Carolina | 27834 | - |
| Regional Gastroenterology Associates of Lancaster, Ltd. | Lancaster | Pennsylvania | 17604 | - |
| Vanderbilt University Medical Center - Drug Shipment | Nashville | Tennessee | 37232-7610 | - |
| Vanderbilt University Medical Center - GCRC | Nashville | Tennessee | 37232 | - |
| Vanderbilt University Medical Center - GI Research Office | Nashville | Tennessee | 37212-1610 | - |
| Vanderbilt University Medical Center - Heart Station | Nashville | Tennessee | 37232 | - |
| Vanderbilt University Medical Center - IBD Clinic | Nashville | Tennessee | 37212-1375 | - |
| Vanderbilt University Medical Center - Radiology | Nashville | Tennessee | 37232 | - |
| Texas Clinical Research Institiute | Arlington | Texas | 76012 | - |
| Austin Endoscopy Center II | Austin | Texas | 78746 | - |
| Austin Gastroenterology PA | Austin | Texas | 78745 | - |
| Austin Gastroenterology PA/Professional Quality Research, Inc. | Austin | Texas | 78705 | - |
| Memorial Hermann Hospital | Houston | Texas | 77030 | - |
| The University of Texas Health Science Center at Houston | Houston | Texas | 77030 | - |
| Digestive Health Specialists of Tyler | Tyler | Texas | 75701 | - |
| VCU Health System Digestive Health Center | Richmond | Virginia | 23298 | - |
| VCU Health System Endoscopy Suite | Richmond | Virginia | 23298 | - |
| VCU Medical Center Investigational Drug Service (IDS) | Richmond | Virginia | 23298 | - |
| Virginia Commonwealth University, Clinical Research Services (CRSU) | Richmond | Virginia | 23298 | - |