| Central Research Associates, LLC (CRA) dba Flourish Research | Birmingham | Alabama | 35205 | - |
| AMR Mobile | Mobile | Alabama | 36608 | - |
| TrialSphere | Chandler | Arizona | 85286 | - |
| Arkansas Clinical Research | Little Rock | Arkansas | 72205 | - |
| Axiom Research, LLC | Colton | California | 92324 | - |
| ProScience Research Group | Culver City | California | 90230 | - |
| Leading Edge Research LA, LLC | Encino | California | 91316 | - |
| Axiom Research, Orange County | Irvine | California | 92604 | - |
| Clinical Research Institute | Los Angeles | California | 90048 | - |
| Downtown L.A. Research Center, Inc. | Los Angeles | California | 90017 | - |
| M3 Wake Research - Mission Mental Health (WR-MMH) | Mission Viejo | California | 92691 | - |
| Excell Research | Oceanside | California | 92056 | - |
| Empire Clinical Research | Pomona | California | 91767 | - |
| The Neurology Group | Pomona | California | 91767 | - |
| Artemis Institute for Clinical Research | Riverside | California | 92503 | - |
| Acclaim Clinical Research | San Diego | California | 92120 | - |
| CenExel Sherman Oaks CA (California Neuroscience Research) | Sherman Oaks | California | 91403 | - |
| Encompass Clinical Research | Spring Valley | California | 91978 | - |
| Diablo Clinical Research | Walnut Creek | California | 94598 | - |
| Sunwise Clinical Research | Walnut Creek | California | 94596 | - |
| Kinetic Clinical Research | West Covina | California | 91790 | - |
| Focus Clinical Research | West Hills | California | 91307 | - |
| IMMUNOe Research Centers | Centennial | Colorado | 80112 | - |
| MCB Clinical Research Centers | Colorado Springs | Colorado | 80910 | - |
| Advanced Neurosciences Research | Fort Collins | Colorado | 80528 | - |
| Chase Medical Research, LLC | Waterbury | Connecticut | 06708 | - |
| DelRicht Research | Atlanta | Georgia | 30329 | - |
| Drug Studies America | Marietta | Georgia | 30060 | - |
| Sleep Care Research Institute d/b/a Clinical Research Atlanta-Stockbridge | Stockbridge | Georgia | 30281 | - |
| Cedar Crosse Research Center | Chicago | Illinois | 60607 | - |
| Chicago Headache Center & Research Institute | Chicago | Illinois | 60657 | - |
| Healthcare Research Network II, LLC | Flossmoor | Illinois | 60447 | - |
| Chicago Headache Center & Research Institute | Naperville | Illinois | 60563 | - |
| Integrated Clinical Trials Solution | West Des Moines | Iowa | 50265 | - |
| Clinical Associates Midwest, LLC | Overland Park | Kansas | 66214 | - |
| Collective Medical Research | Overland Park | Kansas | 66212 | - |
| Heartland Research Associates, LLC - An AMR Company | Wichita | Kansas | 67207 | - |
| Physicians to Children & Adolescents, PSC (Kentucky Pediatric / Adult Research) | Bardstown | Kentucky | 40004 | - |
| AMR Clinical - Lexington | Lexington | Kentucky | 40509 | - |
| CTI Clinical Research Center | Lexington | Kentucky | 45212 | - |
| Monroe Biomedical Research (former L-MARC Research Center) | Louisville | Kentucky | 40213 | - |
| Crescent City Headache & Neurology Center | Chalmette | Louisiana | 70043 | - |
| DelRicht Research | New Orleans | Louisiana | 70115 | - |
| Headlands Research - PharmaSite | Pikesville | Maryland | 21208 | - |
| Boston Clinical Trials - Alcanza | Boston | Massachusetts | 02131 | - |
| MedVadis Research Corporation, LLC | Waltham | Massachusetts | 02451 | - |
| Michigan Headache Pain & Neurological Institute | Ann Arbor | Michigan | 48104 | - |
| Minneapolis Clinic of Neurology | Burnsville | Minnesota | 55337 | - |
| Clinical Research Institute | Minneapolis | Minnesota | 55402 | - |
| DelRicht Research | Gulfport | Mississippi | 39503 | - |
| Proven Endpoints | Ridgeland | Mississippi | 39157 | - |
| StudyMetrix Research | City of Saint Peters | Missouri | 63303 | - |
| Healthcare Research Network | Hazelwood | Missouri | 63042 | - |
| AMR Clinical - Kansas City | Kansas City | Missouri | 64114 | - |
| Clinvest Headlands LLC | Springfield | Missouri | 65807 | - |
| Sundance Clinical Research | St Louis | Missouri | 63141 | - |
| AMR Clinical - Las Vegas | Las Vegas | Nevada | 89119 | - |
| Excel Clinical Research | Las Vegas | Nevada | 89109 | - |
| IMA Clinical Research - Las Vegas | Las Vegas | Nevada | 89102 | - |
| Redbird Research | Las Vegas | Nevada | 89119 | - |
| Wake Research Las Vegas Rainbow | Las Vegas | Nevada | 89118 | - |
| Las Vegas Clinical Trials | North Las Vegas | Nevada | 89030 | - |
| Advanced Research Institute-Reno | Reno | Nevada | 89511 | - |
| Albuquerque Clinical Trials | Albuquerque | New Mexico | 87102 | - |
| Dent Neuro Institute, Buffalo | Amherst | New York | 14226 | - |
| SPRI Clinical Trials, LLC | Brooklyn | New York | 11235 | - |
| True North Neurology | Commack | New York | 11725 | - |
| Central New York Clinical Research | Manlius | New York | 13104 | - |
| Fieve Clinical Research, Inc | New York | New York | 10017 | - |
| Rochester Clinical Research | Rochester | New York | 14609 | - |
| Upstate Clinical Research Associates | Williamsville | New York | 14221 | - |
| OnSite Clinical Solutions | Charlotte | North Carolina | 28277 | - |
| Guilford Neurologic Research Partners, LLC | Greensboro | North Carolina | 27405 | - |
| Headache Wellness Center | Greensboro | North Carolina | 27405 | - |
| Eximia Research - NC, LLC | Raleigh | North Carolina | 27607 | - |
| Carolina Research Center, Inc | Shelby | North Carolina | 28150 | - |
| Hometown Research | Columbus | Ohio | 43228 | - |
| Hometown Research | Huber Heights | Ohio | 45424 | - |
| Hometown Research | Milford | Ohio | 45150 | - |
| CincyScience | West Chester | Ohio | 45069 | - |
| OK Clinical Research, LLC | Edmond | Oklahoma | 73034 | - |
| Hightower Clinical | Oklahoma City | Oklahoma | 73102 | - |
| DelRicht Research | Tulsa | Oklahoma | 74133 | - |
| Tekton Research, Inc. | Yukon | Oklahoma | 73099 | - |
| Advanced Research Institute-Portland | Portland | Oregon | 97223 | - |
| Summit Research Network | Portland | Oregon | 97210 | - |
| Lehigh Center for Clinical Research | Allentown | Pennsylvania | 18103 | - |
| Clinical Research Philadelphia | Philadelphia | Pennsylvania | 19114 | - |
| Preferred Primary Care Physicians, Inc. | Pittsburgh | Pennsylvania | 15236 | - |
| Frontier Clinical Research, LLC | Scottdale | Pennsylvania | 15683 | - |
| Frontier Clinical Research, LLC | Smithfield | Pennsylvania | 15478 | - |
| Coastal Carolina Research Center | North Charleston | South Carolina | 29405 | - |
| WR-ClinSearch, LLC | Chattanooga | Tennessee | 37421 | - |
| Access Clinical Trials Inc | Nashville | Tennessee | 37203 | - |
| Clinical Research Associates, Inc. | Nashville | Tennessee | 37203 | - |
| FutureSearch Trials of Neurology | Austin | Texas | 78731 | - |
| Tekton Research | Austin | Texas | 78745 | - |
| APD Clinical Research | Cypress | Texas | 77372 | - |
| Horizon Clinical Research and Gill Neuroscience | Cypress | Texas | 77429 | - |
| FutureSearch Trials of Dallas, LP | Dallas | Texas | 75251 | - |
| Relaro Medical Trials, LLC | Dallas | Texas | 75243 | - |
| Helios CR, Inc. - Fort Worth | Fort Worth | Texas | 76104 | - |
| DM Clinical Research | Houston | Texas | 77081 | - |
| Victorium Clinical Research | Houston | Texas | 77024 | - |
| Helios CR, Inc. - Keller | Keller | Texas | 76248 | - |
| GMG Clinical Research, LLC dba Radiance Clinical Research | Lampasas | Texas | 76550 | - |
| Aim Trials, LLC | Plano | Texas | 75093 | - |
| ClinPoint Trials | Waxahachie | Texas | 75165 | - |
| Pantheon Clinical Research | Bountiful | Utah | 84010 | - |
| J. Lewis Research, Inc. / Foothill Family Clinic Draper | Draper | Utah | 84020 | - |
| Advanced Research Institute | Ogden | Utah | 84405 | - |
| Granger Medical Clinic | Riverton | Utah | 84096 | - |
| J. Lewis Research, Inc. / Foothill Family Clinic | Salt Lake City | Utah | 84109 | - |
| J. Lewis Research, Inc. / Foothill Family Clinic | Salt Lake City | Utah | 84121 | - |
| Health Research of Hampton Roads, Inc. (HRHR) | Newport News | Virginia | 23606 | - |
| AMR Clinical - Norfolk | Norfolk | Virginia | 23502 | - |
| Seattle Clinical Research Center | Seattle | Washington | 98104 | - |
| Frontier Clinical Research | Morgantown | West Virginia | 26505 | - |
| Clinical Investigation Specialists, Inc. | Kenosha | Wisconsin | 53144 | - |