| 501 | 4365 | Arizona Oncology Associates |  | 3302 | 2530 | 2538 | 3879 |
| 502 | 6221 | Romark Institute for Medical Research | | 7300 | 4922 | 2538 | 3879 |
| 503 | 3995 | Henry M Jackson Foundation for the Advancement of Military Medicine | | 3513 | 1941 | 2538 | 3879 |
| 504 | 3755 | Warren Clinic | | 3114 | 1610 | 2538 | 3879 |
| 505 | 5399 | Pittsburgh Mercy Health System | | 7843 | 3471 | 2538 | 3879 |
| 506 | 6322 | Forestry Sciences Laboratory | | 3336 | 6955 | 2538 | 3410 |
| 507 | 7638 | VHA National Center for Health Promotion & Disease Prevention | | 5729 | 7403 | 2538 | 3879 |
| 508 | 4542 | Alliance for Clinical Trials in Oncology (Cancer Leukemia Group B) | | 5007 | 2689 | 2538 | 3879 |
| 509 | 4516 | Raleigh Orthopaedic Clinic | | 5959 | 4127 | 2538 | 3509 |
| 510 | 3922 | Hahnemann University Hospital | | 5123 | 2600 | 2538 | 3660 |
| 511 | 2696 | Retina Foundation of the Southwest | | 6735 | 4215 | 2538 | 2027 |
| 512 | 1466 | Hebrew Rehabilitation Center for Aged | | 4616 | 1903 | 2538 | 1326 |
| 513 | 1624 | VA Palo Alto Health Care System | | 5373 | 5290 | 2538 | 233 |
| 514 | 4108 | Family Research Institute | | 6450 | 1891 | 2538 | 3879 |
| 515 | 6447 | Postgraduate Center for Mental Health | | 7580 | 5230 | 2538 | 3879 |
| 516 | 2755 | Florida Hospital | | 1889 | 583 | 2538 | 3879 |
| 517 | 3873 | Duke Clinical Research Institute | | 3229 | 1775 | 2538 | 3879 |
| 518 | 7588 | VA New England Healthcare System | | 6389 | 7286 | 2538 | 3879 |
| 519 | 8121 | Center for Information Dissemination and Education Resources | | 7914 | 8119 | 2538 | 3879 |
| 520 | 7808 | VA Sierra Pacific Network VISN 21 | | 7380 | 7590 | 2538 | 3879 |
| 521 | 659 | Missouri Botanical Garden | | 953 | 233 | 2538 | 1218 |
| 522 | 4171 | William Alanson White Institute | | 4265 | 3084 | 2538 | 3660 |
| 523 | 5038 | Mountainside Hospital | | 5623 | 3361 | 2538 | 3879 |
| 524 | 6375 | Learning Research & Development Center | | 4049 | 5466 | 2538 | 3879 |
| 525 | 5488 | Campbell Clinic Medical Center | | 5844 | 3992 | 2538 | 3879 |
| 526 | 7330 | Marion VA Medical Center | | 6580 | 6842 | 2538 | 3879 |
| 527 | 3880 | Catholic Health Initiatives | | 2917 | 1812 | 2538 | 3879 |
| 528 | 5987 | St. Cloud VA Medical Center | | 5491 | 6468 | 2538 | 3410 |
| 529 | 5924 | Jeffrey Modell Foundation | | 7707 | 4380 | 2538 | 3879 |
| 530 | 3422 | Baptist Hospital | | 1724 | 1254 | 2538 | 3879 |
| 531 | 3573 | VA Medical Center Bedford Massachusetts | | 6926 | 7024 | 2538 | 1246 |
| 532 | 1871 | San Francisco VA Medical Center | | 5123 | 5913 | 2538 | 259 |
| 533 | 5629 | Harbor UCLA Medical Center | | 7548 | 3934 | 2538 | 3879 |
| 534 | 7320 | Seattle Prostate Institute at Swedish Medical Center | | 7380 | 6735 | 2538 | 3879 |
| 535 | 468 | American Academy of Pediatrics | | 788 | 44 | 2538 | 1640 |
| 536 | 2540 | Institute of Human Virology | | 6674 | 2510 | 2538 | 2696 |
| 537 | 1954 | American Institute of Mathematics | | 2740 | 1063 | 2538 | 2981 |
| 538 | 7432 | VA Medical Center Grand Junction Colorado | | 7311 | 6957 | 2538 | 3879 |
| 539 | 6368 | VA Sierra Nevada Health Care System | | 6608 | 6523 | 2538 | 3509 |
| 540 | 2669 | Ascension Healthcare | | 523 | 581 | 2538 | 3879 |
| 541 | 3068 | ETR Associates | | 2224 | 1305 | 2538 | 3660 |
| 542 | 5803 | Peachtree Orthopaedic Clinic | | 7041 | 4339 | 2538 | 3879 |
| 543 | 4577 | Foundation for Applied Molecular Evolution | | 6034 | 2672 | 2538 | 3879 |
| 544 | 7133 | Norwood Clinic | | 7767 | 6303 | 2538 | 3879 |
| 545 | 3125 | National Childhood Cancer Foundation | | 3486 | 850 | 2538 | 3879 |
| 546 | 3474 | National Telecommunications and Information Administration | | 735 | 1404 | 2538 | 3879 |
| 547 | 5026 | DermSurgery Associates | | 5382 | 5341 | 2538 | 3410 |
| 548 | 4367 | Neuroscience Education Institute | | 5175 | 3893 | 2538 | 3509 |
| 549 | 381 | City of Hope National Medical Center Duarte | | 1562 | 325 | 2538 | 203 |
| 550 | 5161 | Las Vegas Skin & Cancer Clinics Ltd | | 5188 | 3569 | 2538 | 3879 |
| 551 | 5171 | Materials Research Science & Engineering Centers | | 4140 | 3658 | 2538 | 3879 |
| 552 | 1398 | University of Arizona Cancer Center | | 5144 | 2320 | 2538 | 911 |
| 553 | 6572 | VA Butler Healthcare | | 5476 | 6449 | 2538 | 3660 |
| 554 | 2979 | William S. Middleton Memorial Veterans Hospital | | 6082 | 6464 | 2538 | 1007 |
| 555 | 7325 | University Research Alliance | | 7330 | 6750 | 2538 | 3879 |
| 556 | 4797 | Cardiovascular Institute of the South | | 6019 | 2996 | 2538 | 3879 |
| 557 | 1093 | Mayo Clinic | | 72 | 10 | 2538 | 3879 |
| 558 | 3277 | Saint Luke's Hospitals and Health Care in Idaho | | 1484 | 1095 | 2538 | 3879 |
| 559 | 3300 | Association of Universities for Research in Astronomy | | 4205 | 1001 | 2538 | 3879 |
| 560 | 4196 | Kantar Health (Consumer Health Sciences) | | 4514 | 2154 | 2538 | 3879 |
| 561 | 4305 | Tall Timbers Research Station | | 3213 | 2454 | 2538 | 3879 |
| 562 | 5468 | Baylor Jack and Jane Hamilton Heart and Vascular Hospital | | 5311 | 4022 | 2538 | 3879 |
| 563 | 1479 | Sun Microsystems Laboratories | | 4893 | 2049 | 2538 | 1227 |
| 564 | 3947 | Southern California Orthopedic Institute | | 4328 | 1808 | 2538 | 3879 |
| 565 | 6760 | Institute for Community Research | | 7191 | 6580 | 2538 | 3660 |
| 566 | 7634 | Sheridan VA Medical Center | | 7374 | 7301 | 2538 | 3879 |
| 567 | 2609 | Information Management Service Inc | | 6055 | 5189 | 2538 | 1445 |
| 568 | 7875 | VA Southeast Network VISN 7 | | 7828 | 7662 | 2538 | 3879 |
| 569 | 3799 | International Society for Heart & Lung Transplantation | | 3736 | 1641 | 2538 | 3879 |
| 570 | 3351 | Angiogenesis Foundation | | 6189 | 1980 | 2538 | 3509 |
| 571 | 3704 | Smithsonian Science Education Center (National Science Resources Center) | | 4752 | 1463 | 2538 | 3879 |
| 572 | 4341 | Jewish Home and Hospital | | 5206 | 2350 | 2538 | 3879 |
| 573 | 4823 | Hubbs-Sea World Research Institute | | 6374 | 2994 | 2538 | 3879 |
| 574 | 7456 | Georgia Neurosurgical Institute | | 7374 | 6986 | 2538 | 3879 |
| 575 | 6684 | Ecostudies Institute | | 6954 | 5729 | 2538 | 3879 |
| 576 | 1389 | Nicklaus Children's Hospital (Miami Children's Hospital Pediatric Healthcare) | | 1605 | 1199 | 2538 | 1813 |
| 577 | 5635 | Center for Neurologic Study | | 7598 | 3923 | 2538 | 3879 |
| 578 | 4861 | New Jersey Center for Biomaterials | | 5986 | 4642 | 2538 | 3509 |
| 579 | 2892 | Conservation Fund | | 2182 | 701 | 2538 | 3879 |
| 580 | 1709 | National Academy of Engineering | | 937 | 380 | 2538 | 3316 |
| 581 | 1531 | World Wildlife Fund | | 1073 | 39 | 2538 | 3879 |
| 582 | 3232 | Center for the Advancement of Health | | 4187 | 927 | 2538 | 3879 |
| 583 | 7481 | US Army Research Institute of Environmental Medicine | | 6800 | 7074 | 2538 | 3879 |
| 584 | 7967 | VHA eHealth University | | 7266 | 7920 | 2538 | 3879 |
| 585 | 4494 | Mental Health | | 4916 | 2622 | 2538 | 3879 |
| 586 | 2540 | Tennessee Valley Healthcare System | | 6180 | 6658 | 2538 | 489 |
| 587 | 5943 | VA Southern Nevada Healthcare System | | 6212 | 6372 | 2538 | 3410 |
| 588 | 2627 | VA Medical Center Birmingham | | 7086 | 6415 | 2538 | 661 |
| 589 | 1277 | Boyce Thompson Institute for Plant Research | | 4011 | 1855 | 2538 | 895 |
| 590 | 7885 | Intermountain Injury Control Research Center | | 8011 | 8069 | 2538 | 3410 |
| 591 | 5973 | SpineNevada | | 6800 | 4632 | 2538 | 3879 |
| 592 | 5253 | Institute for Telecommunication Sciences | | 1834 | 3982 | 2538 | 3879 |
| 593 | 7916 | Advanced Platform Technology Center | | 6713 | 7862 | 2538 | 3879 |
| 594 | 2251 | Rocky Mountain Biological Laboratory | | 5459 | 2716 | 2538 | 2249 |
| 595 | 7417 | Aberdeen Test Center | | 7350 | 6918 | 2538 | 3879 |
| 596 | 3891 | Fannie and John Hertz Foundation | | 4386 | 1727 | 2538 | 3879 |
| 597 | 2171 | Michael E. DeBakey VA Medical Center | | 6414 | 5978 | 2538 | 446 |
| 598 | 4670 | Pinchot Institute for Conservation | | 4459 | 2946 | 2538 | 3879 |
| 599 | 2274 | Family Research Council | | 1976 | 273 | 2538 | 3879 |
| 600 | 3716 | Carnegie Observatories | | 2007 | 1623 | 2538 | 3879 |
