| Children's National Medical center | Children's National Medical center |
| MedStar Washington Hospital Center | MedStar Washington Hospital Center |
| MedStar Georgetown University Hospital | MedStar Georgetown University Hospital |
| Lombardi Comprehensive Cancer Center at Georgetown University Medical Center | Lombardi Comprehensive Cancer Center at Georgetown University Medical Center |
| Georgetown University Medical Center | Georgetown University Medical Center |
| Georgetown University | Georgetown University |
| Sibley Memorial Hospital | Sibley Memorial Hospital |
| George Washington University Medical Center | George Washington University Medical Center |
| Veterans Affairs Medical Center - Washington, DC | Veterans Affairs Medical Center - Washington, DC |
| George Washington University | George Washington University |
| George Washington University Medical Faculty Associates | George Washington University Medical Faculty Associates |
| Medstar Health Research Institute | Medstar Health Research Institute |
| Howard University Hospital | Howard University Hospital |
| Washington Cancer Institute | Washington Cancer Institute |
| Whitman Walker Clinic | Whitman Walker Clinic |
| Howard University | Howard University |
| Dupont Circle Physician's Group | Dupont Circle Physician's Group |
| MBCCOP - Howard University Cancer Center | MBCCOP - Howard University Cancer Center |
| Kaiser Permanente-Capitol Hill Medical Center | Kaiser Permanente-Capitol Hill Medical Center |
| MedStar National Rehabilitation Hospital | MedStar National Rehabilitation Hospital |
| Children's Research Institute | Children's Research Institute |
| Washington Health Institute | Washington Health Institute |
| Physicians Committee for Responsible Medicine | Physicians Committee for Responsible Medicine |
| International Spine Pain, and Performance Center | International Spine Pain, and Performance Center |
| Emerson Clinical Research Institute | Emerson Clinical Research Institute |
| American University | American University |
| Howard University Hosp., Div. of Infectious Diseases, ACTU | Howard University Hosp., Div. of Infectious Diseases, ACTU |
| MedStar Georgetown Transplant Institute | MedStar Georgetown Transplant Institute |
| Georgetown University Hospital - Dept of Neurology | Georgetown University Hospital - Dept of Neurology |
| Washington Hospital Center-MedStar Research Institute | Washington Hospital Center-MedStar Research Institute |
| Office of Dr. James A. Simon, MD | Office of Dr. James A. Simon, MD |
| The Centers for Vulvovaginal Disorders | The Centers for Vulvovaginal Disorders |
| George Washington Univ. CRS | George Washington Univ. CRS |
| George Washington University School of Medicine and Health Sciences | George Washington University School of Medicine and Health Sciences |
| Georgetown University School of Medicine | Georgetown University School of Medicine |
| Medstar Heart and Vascular Institute | Medstar Heart and Vascular Institute |
| Walter Reed Army Medical Center, Center for Refractive Surgery | Walter Reed Army Medical Center, Center for Refractive Surgery |
| International Food Policy Research Institute | International Food Policy Research Institute |
| Georgetown University Department of Family Medicine | Georgetown University Department of Family Medicine |
| Physicans Home Service | Physicans Home Service |
| Howard University College of Medicine | Howard University College of Medicine |
| Washington Hospital Center Cardiovascular Research Institute | Washington Hospital Center Cardiovascular Research Institute |
| Milken Institute School of Public Health, George Washington University | Milken Institute School of Public Health, George Washington University |
| Meridian Clinical Research, LLC | Meridian Clinical Research, LLC |
| Truth Initiative | Truth Initiative |
| Georgetown | Georgetown |
| Georgetown University Medical Center - Department of Rheumatology | Georgetown University Medical Center - Department of Rheumatology |
| Urologic Surgeons of Washington | Urologic Surgeons of Washington |
| Children's National Medical Center-Site Number:840067 | Children's National Medical Center-Site Number:840067 |
| Dr. Timothy A. Price Med. Practice CRS | Dr. Timothy A. Price Med. Practice CRS |
| Howard University Center for Sickle Cell Disease | Howard University Center for Sickle Cell Disease |
| Center for Dermatology and Dermatologic Surgery | Center for Dermatology and Dermatologic Surgery |
| Washington Institute of Dermatologic Laser Surgery | Washington Institute of Dermatologic Laser Surgery |
| Metropolitan Gastroenterology Group, PC | Metropolitan Gastroenterology Group, PC |
| Family and Medical Counseling Service, Inc | Family and Medical Counseling Service, Inc |
| Mathematica Policy Research | Mathematica Policy Research |
| Mathematica | Mathematica |
| Capital Breast Care Center | Capital Breast Care Center |
| MedStar Health | MedStar Health |
| American College of Cardiology/National Cardiovascular Data Registry (NCDR) | American College of Cardiology/National Cardiovascular Data Registry (NCDR) |
| Children's National Medical Center - Sheikh Zayed Campus - Infectious Disease | Children's National Medical Center - Sheikh Zayed Campus - Infectious Disease |
| George Washington University Cancer Center | George Washington University Cancer Center |
| Howard University - IMPAACT Site | Howard University - IMPAACT Site |
| COPD Foundation | COPD Foundation |
| Georgetown University; Research Division, Psychiatry | Georgetown University; Research Division, Psychiatry |
| The Burn Center at Washington Hospital Center | The Burn Center at Washington Hospital Center |
| Clinical Research Unit; Howard University Hospital | Clinical Research Unit; Howard University Hospital |
| Howard University Hospital Pediatric Clinic | Howard University Hospital Pediatric Clinic |
| Georgetown Children's Research Network | Georgetown Children's Research Network |
| La Clinica Del Pueblo | La Clinica Del Pueblo |
| MetroHealth | MetroHealth |
| Rx Trials | Rx Trials |
| Washington DC VA Med Center; Hematology | Washington DC VA Med Center; Hematology |
| American College of Cardiology | American College of Cardiology |
| Children's National Medical Center - D.C. Center for Cancer and Blood Disorders | Children's National Medical Center - D.C. Center for Cancer and Blood Disorders |
| DaVita K Street | DaVita K Street |
| Georgetown University Medical Center- Research Parent | Georgetown University Medical Center- Research Parent |
| IntimMedicine Specialists | IntimMedicine Specialists |
| Clinics of Dr. Edwin Chapman @ MHDG | Clinics of Dr. Edwin Chapman @ MHDG |
| The Women's Collective | The Women's Collective |
| Georgetown University Medical Center Department of Pharmacy, Research | Georgetown University Medical Center Department of Pharmacy, Research |
| Dr Mahmoud Mustafa | Dr Mahmoud Mustafa |
| Gallaudet University | Gallaudet University |
| Columbia Fertility Associates | Columbia Fertility Associates |
| Clinical Research Unit | Clinical Research Unit |
| West End Plastic Surgery | West End Plastic Surgery |
| CAO Research Foundation | CAO Research Foundation |
| George Washington University Department of Dermatology | George Washington University Department of Dermatology |
| MedStar Georgetown-MedStar Georgetown Transplant Institute University Hospital (MGUH) | MedStar Georgetown-MedStar Georgetown Transplant Institute University Hospital (MGUH) |
| The George Washington Medical Faculty Associates - Foggy Bottom North Pavilion | The George Washington Medical Faculty Associates - Foggy Bottom North Pavilion |
| The George Washington University Medical Faculty Associates - Infectious Diseases | The George Washington University Medical Faculty Associates - Infectious Diseases |
| Whitman Walker Clinic/Elizabeth Taylor Med Ctr | Whitman Walker Clinic/Elizabeth Taylor Med Ctr |
| The George Washington University, Department of Emergency Medicine | The George Washington University, Department of Emergency Medicine |
| The George Washington University- Department of Otolaryngology | The George Washington University- Department of Otolaryngology |
| Institute for Clinical Research | Institute for Clinical Research |
| Foxhall Dermatology | Foxhall Dermatology |
| Salvation Army Harbor Light Treatment Center | Salvation Army Harbor Light Treatment Center |
| Department of Rheumatology | Department of Rheumatology |
| The George Washington University, Department of Health, Human Function and Rehabilitation Science | The George Washington University, Department of Health, Human Function and Rehabilitation Science |
| Howard University Hospital Adult Clinic | Howard University Hospital Adult Clinic |
| Office of Minority Health and Health Disparities Research | Office of Minority Health and Health Disparities Research |
| Kimmel Cancer Center at Johns Hopkins at Sibley Memorial Hospital | Kimmel Cancer Center at Johns Hopkins at Sibley Memorial Hospital |
| Georgetown University Medical Center - Division of Infectious Diseases | Georgetown University Medical Center - Division of Infectious Diseases |