| Central Research Associates, Inc | Birmingham | Alabama | 35205 | - |
| Coastal Clinical Research, Inc. | Mobile | Alabama | 36608 | - |
| Thunderbird Internal Medicine / Radiant Research, Inc | Glendale | Arizona | 85306 | - |
| Clinical Research Consortium Arizona | Tempe | Arizona | 85283 | - |
| Neurological Physicians of Arizona | Tempe | Arizona | 85202 | - |
| Woodland International Research Group, LLC | Little Rock | Arkansas | 72211 | - |
| Woodland Research Northwest, LLC | Rogers | Arkansas | 72758 | - |
| Pharmacology Research Institute | Encino | California | 91316 | - |
| eStudySite | La Mesa | California | 91942 | - |
| Collaborative Neuroscience Network, LLC | Long Beach | California | 90806 | - |
| Pharmacology Research Institute | Los Alamitos | California | 90720 | - |
| Pharmacology Research Institute | Newport Beach | California | 92660 | - |
| Pacific Research Partners LLC | Oakland | California | 94607 | - |
| National Research Institute | Panorama City | California | 91402 | - |
| Optimus Medical Group | San Francisco | California | 94102 | - |
| California Medical Clinic for Headache | Santa Monica | California | 90404 | - |
| California Neuroscience Research Medical Group, Inc. | Sherman Oaks | California | 91403 | - |
| Diablo Clinical Research, Inc | Walnut Creek | California | 94598 | - |
| Clinical Trials of the Rockies | Denver | Colorado | 80209 | - |
| AGA Clinical Trials | Hialeah | Florida | 33012 | - |
| Clinical Neuroscience Solutions, Inc. | Jacksonville | Florida | 32256 | - |
| Multi-Specialty Research Associates, Inc | Lake City | Florida | 32055 | - |
| Renstar Medical Research | Ocala | Florida | 34471 | - |
| Clinical Neuroscience Solutions, Inc | Orlando | Florida | 32801 | - |
| Compass Research, LLC | Orlando | Florida | 32806 | - |
| Ormond Medical Arts Pharmaceutical Research | Ormond Beach | Florida | 32174 | - |
| Meridien Research | Tampa | Florida | 33634 | - |
| Radiant Research, Inc. | Atlanta | Georgia | 30328 | - |
| Meridian Clinical Research | Savannah | Georgia | 31406 | - |
| Savannah Neurology Specialists | Savannah | Georgia | 31406 | - |
| Christie Clinic, LLC | Champaign | Illinois | 61820 | - |
| PMG Research of McFrland Clinic | Ames | Iowa | 50010 | - |
| Heartland Research Associates, LLC | Augusta | Kansas | 67010 | - |
| Heartland Research Associates, LLC | Newton | Kansas | 67114 | - |
| Heartland Research Associates, LLC | Wichita | Kansas | 67205 | - |
| Heartland Research Associates, LLC | Wichita | Kansas | 67207 | - |
| Benchmark Research | Metairie | Louisiana | 70006 | - |
| MedPharmics, LLC | Metairie | Louisiana | 70006 | - |
| New Orleans Center for Clinical Research | New Orleans | Louisiana | 70119 | - |
| Boston Clinical Trials, Inc. | Boston | Massachusetts | 02131 | - |
| NECCR Primacare Research, LLC | Fall River | Massachusetts | 02721 | - |
| Milford Emergency Associates, Inc. | Marlborough | Massachusetts | 01752 | - |
| Michigan Head Pain and Neurological Institute | Ann Arbor | Michigan | 48104 | - |
| Clinical Research Institute, Inc. | Minneapolis | Minnesota | 55402 | - |
| Clinical Research Insitute | Plymouth | Minnesota | 55441 | - |
| The Center for Pharmaceutical Research | Kansas City | Missouri | 64114 | - |
| Sundance Clinical Research, LLC | St Louis | Missouri | 63141 | - |
| Meridian Clinical Research -Norfolk | Norfolk | Nebraska | 68701 | - |
| Meridian Clinical Research, LLC | Omaha | Nebraska | 68134 | - |
| Clinical Research Consortium- Las Vegas | Las Vegas | Nevada | 89119 | - |
| Hassman Research Institute, LLC | Berlin | New Jersey | 08009 | - |
| Albuquerque Neuroscience, Inc. | Albuquerque | New Mexico | 87109 | - |
| United Medical Associates | Binghamton | New York | 13901 | - |
| SPRI Clinical Trials, LLC | Brooklyn | New York | 11235 | - |
| Regional Clinical Research, Inc. | Endwell | New York | 13760 | - |
| Radiant Research, Inc. | Jamaica | New York | 11432 | - |
| Central New York Clinical Research | Manlius | New York | 13104 | - |
| Fieve Clinical Research | New York | New York | 10168 | - |
| Rochester Clinical Research, Inc | Rochester | New York | 14609 | - |
| Montefiore Heachache Center | The Bronx | New York | 10461 | - |
| PMG Research of Charlotte, LLC | Charlotte | North Carolina | 28209 | - |
| PharmQuest, LLC | Greensboro | North Carolina | 27408 | - |
| PMG Research of Raleigh, LLC | Raleigh | North Carolina | 27609 | - |
| Wake Research Associates, LLC | Raleigh | North Carolina | 27612 | - |
| PMG Research of Wilmington, LLC | Wilmington | North Carolina | 28401 | - |
| CTI Clinical Research Center | Cincinnati | Ohio | 45227 | - |
| Radiant Research, Inc. | Cincinnati | Ohio | 45236 | - |
| Radiant Research, Inc. | Columbus | Ohio | 43212 | - |
| Midwest Clinical Research Center | Dayton | Ohio | 45417 | - |
| Neurology Diagnostics, Inc. | Dayton | Ohio | 45459 | - |
| Aventiv Research, Inc. | Dublin | Ohio | 43016 | - |
| Summit Research Network (Oregon), Inc. | Portland | Oregon | 97210 | - |
| Oregon Center for Clinical Investigations, Inc | Salem | Oregon | 97301 | - |
| Clinical Research of Philadelphia, LLC | Philadelphia | Pennsylvania | 19114 | - |
| Fieve Clinical Research | Scranton | Pennsylvania | 18503 | - |
| Preferred Primary Care Physicians | Uniontown | Pennsylvania | 15401 | - |
| Omega Medical Research | Warwick | Rhode Island | 02886 | - |
| Radiant Research, Inc. | Anderson | South Carolina | 29621 | - |
| Coastal Carolina Research Center | Mt. Pleasant | South Carolina | 29464 | - |
| Meridian Clinical Research | Dakota Dunes | South Dakota | 57049 | - |
| PMG Research of Bristol, LLC | Bristol | Tennessee | 37620 | - |
| Clinical Neuroscience Solutions, Inc | Memphis | Tennessee | 38119 | - |
| Clinical Research Associates, Inc. | Nashville | Tennessee | 37203 | - |
| FutureSearch Trials of Neurology, LP | Austin | Texas | 78731 | - |
| Tekton Research- Austin | Austin | Texas | 78745 | - |
| FutureSearch Trials of Neurology, LP | Dallas | Texas | 75231 | - |
| Ventavia Research Group, LLC | Fort Worth | Texas | 76104 | - |
| Texas Center for Drug Development | Houston | Texas | 77081 | - |
| Red Star Research, LLC | Lake Jackson | Texas | 77566 | - |
| FMC Science | Lampasas | Texas | 76550 | - |
| PCP for Life | Magnolia | Texas | 77355 | - |
| Research Across America - Mesquite | Mesquite | Texas | 75149 | - |
| Doctors of Internal Medicine, LTD / Radiant Research Inc. | Plano | Texas | 75093 | - |
| DM Clinical Research | Tomball | Texas | 77375 | - |
| J.Lewis Research Inc / Foothill Family Clinic South | Salt Lake City | Utah | 84121 | - |
| Tidewater Integrated Medical Research | Virginia Beach | Virginia | 23454 | - |
| Northwest Clinical Research Center | Bellevue | Washington | 98007 | - |
| Seattle Women's:Health, Research & Gynecology | Seattle | Washington | 98105 | - |