| Fountain Hills Family Practice, P.C. | Fountain Hills | Arizona | 85268 | - |
| Thomas C. Lenzmeier, M.D., P.C. | Glendale | Arizona | 85308 | - |
| Central Phoenix Medical Center | Phoenix | Arizona | 85020 | - |
| Family Practice Specialists | Phoenix | Arizona | 85018 | - |
| Fiel Family and Sports Medicine | Tempe | Arizona | 85283 | - |
| Arizona Community Physicians | Tucson | Arizona | 85712 | - |
| Orange Grove Family Practice | Tucson | Arizona | 85741 | - |
| Anaheim Clinical Trials | Anaheim | California | 92801 | - |
| Radiant Research | Carlsbad | California | 92008 | - |
| Research Center of Fresno, Inc. | Fresno | California | 93726 | - |
| Marin Endocrine Care and Research, Inc. | Greenbrae | California | 94904 | - |
| National Research Institute | Huntington Park | California | 90255 | - |
| National Research Institute | Los Angeles | California | 91402 | - |
| Catalina Research Institute | Montclair | California | 91710 | - |
| Providence Clinical Research | North Hollywood | California | 91606 | - |
| Center for Clinical Trials of Sacramento, Inc. | Sacramento | California | 95816 | - |
| Denver VA Medical Center | Aurora | Colorado | 80045 | - |
| Radiant Research | Centennial | Colorado | 75115 | - |
| Colorado Springs Health Partners - East | Colorado Springs | Colorado | 80922 | - |
| Columbine Family Practice | Littleton | Colorado | 80128 | - |
| Nature Coast Clinical Reseaerch - Crystal River | Crystal River | Florida | 34429 | - |
| Indago Research and Health Center, Inc. | Hialeah | Florida | 33012 | - |
| Clinical Neuroscience Solutions, Inc. | Jacksonville | Florida | 32256 | - |
| Research Institure of South Florida | Miami | Florida | 33173 | - |
| Clinical Neuroscience Solutions, Inc. | Orlando | Florida | 32801 | - |
| Palm Harbor Medical Associates | Palm Harbor | Florida | 34684 | - |
| Andres Patron, D.O., P.A | Pembroke Pines | Florida | 33026 | - |
| South Broward Research | Pembroke Pines | Florida | 33027 | - |
| Atlanta Center for Medical Research | Atlanta | Georgia | 30331 | - |
| Primary Care Research Group | Atlanta | Georgia | 30312 | - |
| Solaris Clinical Research | Meridian | Idaho | 83646 | - |
| Michigan Avenue Internists | Chicago | Illinois | 60604 | - |
| Medical and Procedural Specialists | Skokie | Illinois | 60077 | - |
| HSHS Medical Group DIabetes Research | Springfield | Illinois | 62711 | - |
| Community Hospital of Anderson and Madison County, Inc. | Anderson | Indiana | 46011 | - |
| Clinical Research Advantage | Evansville | Indiana | 47225 | - |
| American Health Network of Indiana, LLC | Franklin | Indiana | 46131 | - |
| American Health Network of Indiana, LLC | New Albany | Indiana | 47150 | - |
| Heartland Research Associates, LLC | Augusta | Kansas | 67010 | - |
| Overland Park Surgical Specialists, LLL dba College Park Family Care Center | Overland Park | Kansas | 66210 | - |
| Cotton O'Neil Clinical Research Center | Topeka | Kansas | 66606 | - |
| Heartland Research Associates, LLC | Wichita | Kansas | 67205 | - |
| Heartland Research Associates, LLC | Wichita | Kansas | 67207 | - |
| Pennington Biomedical Research Center | Baton Rouge | Louisiana | 70808 | - |
| Maine Research Associates | Auburn | Maine | 04210 | - |
| Joslin Diabetes Center | Boston | Massachusetts | 02215 | - |
| Radiant Research, Inc. | Edina | Minnesota | 55435 | - |
| Ehrhardt Clinical Research, LLC | Belton | Missouri | 64012 | - |
| HealthCare Research Network | Hazelwood | Missouri | 63042 | - |
| Mercury Street Medical Group | Butte | Montana | 59701 | - |
| Skyline Medical Center | Elkhorn | Nebraska | 68022 | - |
| Nevada Family Care | Henderson | Nevada | 89047 | - |
| Palm Research Center, Inc. | Las Vegas | Nevada | 89148 | - |
| Albany Medical College | Albany | New York | 12208 | - |
| Scott Research Center | Laurelton | New York | 11413 | - |
| American Health Research | Charlotte | North Carolina | 28207 | - |
| Medication Management, LLC | Greensboro | North Carolina | 27408 | - |
| Down East Medical Associates, PA | Morehead City | North Carolina | 28557 | - |
| PMG Research of Wilmington, LLC | Wilmington | North Carolina | 28401 | - |
| Radiant Research | Akron | Ohio | 44311 | - |
| Sentral Clinical Research Services, LLC | Cincinnati | Ohio | 45236 | - |
| Aventiv Research | Columbus | Ohio | 43231 | - |
| Canyon Medical Center, LLC | Columbus | Ohio | 43213 | - |
| Prestige Clinical Research | Franklin | Ohio | 45005 | - |
| Wells Institute for Health Awareness | Kettering | Ohio | 45429 | - |
| University of Toledo | Toledo | Ohio | 43614 | - |
| Oklahoma City Clinic - Midwest City | Midwest City | Oklahoma | 73110 | - |
| Intend Research | Norman | Oklahoma | 73069 | - |
| Lynn Health Science Institute | Oklahoma City | Oklahoma | 73112 | - |
| Oklahoma City Clinic - Central | Oklahoma City | Oklahoma | 73104 | - |
| Clinical Research Institute of Southern Oregon, PC | Medford | Oregon | 97504 | - |
| Harleysville Medical Associates | Harleysville | Pennsylvania | 19438 | - |
| Thomas Jefferson University Hospital | Philadelphia | Pennsylvania | 19107 | - |
| Preferred Primary Care Phys Inc | Pittsburgh | Pennsylvania | 15243 | - |
| Preferred Primary Care Physicians | Uniontown | Pennsylvania | 15401 | - |
| Clinical Research of Rock Hill | Rock Hill | South Carolina | 29732 | - |
| Spartanburg Medical Research | Spartanburg | South Carolina | 29303 | - |
| Holston Medical Group, P.C. | Kingsport | Tennessee | 37660 | - |
| Clinical Neuroscience Solutions, Inc. | Memphis | Tennessee | 38119 | - |
| DCT-AACT, LLC dba Discovery Clinical Trials | Austin | Texas | 78758 | - |
| Dallas Diabetes and Endocrine Center | Dallas | Texas | 75230 | - |
| Research Institute of Dallas | Dallas | Texas | 75231 | - |
| Global Medical Research | DeSoto | Texas | 75115 | - |
| Juno Research | Houston | Texas | 77004 | - |
| PCP for Life - -Tidwell | Houston | Texas | 77093 | - |
| Sante Clinical Research | Kerrville | Texas | 78028 | - |
| Health Texas Research Institute | San Angelo | Texas | 78228 | - |
| Clinical Trials of Texas, Inc. | San Antonio | Texas | 78229 | - |
| MacGregor Medical Center | San Antonio | Texas | 78240 | - |
| Panacea Clinical Research | San Antonio | Texas | 78228 | - |
| Victorium Clinical Research Ltd. | San Antonio | Texas | 78230 | - |
| Crossroads Clinical Research, LLC | Victoria | Texas | 77901 | - |
| Ericksen Research and Development, LLC | Clinton | Utah | 84015 | - |
| Radiant Research | Murray | Utah | 84123 | - |
| Advanced Clinical Research | West Jordan | Utah | 84088 | - |
| Sound Healthcare | Port Orchard | Washington | 98366 | - |