| 501 | 3854 | VA Western New York Healthcare System at Buffalo |  | 5612 | 6713 | 2538 | 1891 |
| 502 | 7454 | VA Northwest Network VISN 20 | | 5603 | 7104 | 2538 | 3879 |
| 503 | 2089 | Children's Oncology Group | | 5579 | 1369 | 2538 | 2822 |
| 504 | 6784 | Hoosier Cancer Research Network (Hoosier Oncology Group) | | 5574 | 5984 | 2538 | 3879 |
| 505 | 4291 | VA Healthcare System Bay Pines | | 5560 | 6047 | 2538 | 2696 |
| 506 | 4612 | Taos Orthopaedic Institute | | 5547 | 6074 | 2538 | 2919 |
| 507 | 2236 | VA Boston Healthcare System | | 5535 | 5616 | 2538 | 728 |
| 508 | 4450 | International Heart Institute Montana Foundation | | 5535 | 2494 | 2538 | 3879 |
| 509 | 2764 | National Capital Poison Center | | 5531 | 499 | 2538 | 3879 |
| 510 | 3634 | Gas Technology Institute | | 5524 | 1341 | 2538 | 3879 |
| 511 | 3892 | Harry S. Truman Memorial Veterans' Hospital | | 5520 | 7019 | 2538 | 1681 |
| 512 | 1728 | VA Greater Los Angeles Healthcare System | | 5520 | 5100 | 2538 | 356 |
| 513 | 7076 | USGS National Fisheries Research Center Great Lakes | | 5512 | 6477 | 2538 | 3879 |
| 514 | 6393 | Hydrologic Engineering Center US Army Corps of Engineers | | 5507 | 5401 | 2538 | 3879 |
| 515 | 2819 | Land Institute | | 5506 | 1043 | 2304 | 3879 |
| 516 | 5987 | St. Cloud VA Medical Center | | 5491 | 6468 | 2538 | 3410 |
| 517 | 2984 | Mount Washington Observatory | | 5489 | 662 | 2538 | 3879 |
| 518 | 6572 | VA Butler Healthcare | | 5476 | 6449 | 2538 | 3660 |
| 519 | 5372 | Columbia Mountains Institute of Applied Ecology |  | 5464 | 3861 | 2538 | 3879 |
| 520 | 2406 | New York Blood Center | | 5460 | 1151 | 1249 | 3879 |
| 521 | 7536 | Quality Enhancement Research Initiative | | 5460 | 7237 | 2538 | 3879 |
| 522 | 2251 | Rocky Mountain Biological Laboratory | | 5459 | 2716 | 2538 | 2249 |
| 523 | 4618 | Exeter Hospital | | 5455 | 2784 | 2538 | 3879 |
| 524 | 2859 | South Texas Veterans Health Care System | | 5447 | 6963 | 2538 | 649 |
| 525 | 4945 | Sonoran Spine Center | | 5442 | 4259 | 2538 | 3660 |
| 526 | 5077 | Office of Public Health and Environmental Hazards | | 5431 | 3441 | 2538 | 3879 |
| 527 | 3365 | Fernbank Museum | | 5430 | 1042 | 2538 | 3879 |
| 528 | 1441 | Infectious Disease Research Institute | | 5429 | 2620 | 1707 | 1934 |
| 529 | 4235 | Group Health Center for Health Studies | | 5423 | 2160 | 2538 | 3879 |
| 530 | 4920 | Riverview Medical Center | | 5399 | 3232 | 2538 | 3879 |
| 531 | 5026 | DermSurgery Associates | | 5382 | 5341 | 2538 | 3410 |
| 532 | 4187 | Eskenazi Health Sidney & Lois Eskenazi Hospital Indianapolis | | 5377 | 2088 | 2538 | 3879 |
| 533 | 1624 | VA Palo Alto Health Care System | | 5373 | 5290 | 2538 | 233 |
| 534 | 5849 | Royal Columbian Hospital | | 5366 | 4573 | 2538 | 3879 |
| 535 | 3097 | Hunter Holmes McGuire Richmond VA Medical Center | | 5336 | 6326 | 2538 | 1292 |
| 536 | 5357 | Aldo Leopold Wilderness Research Institute | | 5336 | 3855 | 2538 | 3879 |
| 537 | 7405 | National Center for Ethics in Health Care | | 5336 | 7056 | 2538 | 3879 |
| 538 | 3902 | Huntington Medical Research Institute | | 5311 | 3513 | 1786 | 3879 |
| 539 | 5468 | Baylor Jack and Jane Hamilton Heart and Vascular Hospital | | 5311 | 4022 | 2538 | 3879 |
| 540 | 3212 | VA Nebraska-Western Iowa Health Care System | | 5311 | 6187 | 2538 | 1538 |
| 541 | 2653 | North Florida/South Georgia Veterans Health System | | 5271 | 5832 | 2538 | 1084 |
| 542 | 1658 | Greenwood Genetics Center | | 5257 | 2786 | 2151 | 2039 |
| 543 | 4281 | Saint John's Hospital Springfield | | 5257 | 2256 | 2538 | 3879 |
| 544 | 4478 | Sonoran Institute | | 5243 | 2572 | 2538 | 3879 |
| 545 | 4341 | Jewish Home and Hospital | | 5206 | 2350 | 2538 | 3879 |
| 546 | 5706 | Methodist Sports Medicine Center | | 5188 | 4406 | 2538 | 3879 |
| 547 | 4565 | Ocular Immunology and Uveitus Foundation | | 5188 | 2710 | 2538 | 3879 |
| 548 | 5161 | Las Vegas Skin & Cancer Clinics Ltd | | 5188 | 3569 | 2538 | 3879 |
| 549 | 4367 | Neuroscience Education Institute | | 5175 | 3893 | 2538 | 3509 |
| 550 | 4161 | Powder Coating Institute | | 5175 | 2067 | 2538 | 3879 |
| 551 | 5704 | Tucson Orthopaedic Institute | | 5175 | 4402 | 2538 | 3879 |
| 552 | 2301 | Ralph H. Johnson VA Medical Center | | 5175 | 5799 | 2538 | 722 |
| 553 | 2783 | VA NY Harbor Healthcare System | | 5160 | 6444 | 2538 | 900 |
| 554 | 4048 | Truman Medical Centers | | 5160 | 1898 | 2538 | 3879 |
| 555 | 2951 | Helen Keller International | | 5160 | 1084 | 2538 | 3660 |
| 556 | 688 | National Institute of Health Clinical Center | | 5144 | 2193 | 1411 | 368 |
| 557 | 3320 | Allergy Research Foundation | | 5144 | 1560 | 2538 | 3660 |
| 558 | 4113 | Tellus Institute | | 5144 | 2017 | 2538 | 3879 |
| 559 | 1398 | University of Arizona Cancer Center | | 5144 | 2320 | 2538 | 911 |
| 560 | 3922 | Hahnemann University Hospital | | 5123 | 2600 | 2538 | 3660 |
| 561 | 3392 | VA Medical Center Milwaukee Wisconsin | | 5123 | 6158 | 2538 | 1797 |
| 562 | 1871 | San Francisco VA Medical Center | | 5123 | 5913 | 2538 | 259 |
| 563 | 4053 | BioDiversity Research Institute | | 5123 | 1912 | 2538 | 3879 |
| 564 | 3857 | Roger Williams Medical Center | | 5115 | 3046 | 2538 | 3509 |
| 565 | 4559 | Martin's Point Health Care | | 5103 | 2705 | 2538 | 3879 |
| 566 | 4994 | Kestrel Institute | | 5062 | 3345 | 2538 | 3879 |
| 567 | 3084 | Texas Back Institute | | 5062 | 2585 | 2538 | 3191 |
| 568 | 5516 | Native American Cancer Research | | 5048 | 4129 | 2538 | 3879 |
| 569 | 4545 | Ontario Research Center for Computer Algebra | | 5048 | 2688 | 2538 | 3879 |
| 570 | 5295 | Thames Valley Children's Centre | | 5048 | 3761 | 2538 | 3879 |
| 571 | 4937 | Ogden Clinic | | 5040 | 3284 | 2538 | 3879 |
| 572 | 5182 | New York Headache Center | | 5025 | 3610 | 2538 | 3879 |
| 573 | 4542 | Alliance for Clinical Trials in Oncology (Cancer Leukemia Group B) | | 5007 | 2689 | 2538 | 3879 |
| 574 | 3014 | Florida Orthopaedic Institute | | 5007 | 3188 | 2538 | 2919 |
| 575 | 2173 | National Institute of Nursing Research | | 4983 | 3067 | 2538 | 2002 |
| 576 | 7082 | Tripler Army Medical Center | | 4983 | 6516 | 2538 | 3879 |
| 577 | 4395 | Decision Sciences Institute | | 4969 | 2452 | 2538 | 3879 |
| 578 | 1860 | Maine Medical Center Research Institute | | 4969 | 2981 | 2538 | 1518 |
| 579 | 2437 | VA Maryland Health Care System | | 4953 | 5837 | 2538 | 873 |
| 580 | 4707 | Memorial Hospital Jacksonville | | 4953 | 2971 | 2538 | 3879 |
| 581 | 717 | La Jolla Institute for Allergy & Immunology | | 4947 | 2306 | 330 | 665 |
| 582 | 3295 | Alaska Sea Life Center | | 4935 | 1157 | 2509 | 3879 |
| 583 | 2164 | VA Pittsburgh Healthcare System | | 4935 | 5901 | 2538 | 525 |
| 584 | 4494 | Mental Health | | 4916 | 2622 | 2538 | 3879 |
| 585 | 4887 | Hotel Dieu Hospital Kingston | | 4916 | 3227 | 2538 | 3879 |
| 586 | 4404 | Central Institute for the Deaf St Louis | | 4893 | 2469 | 2538 | 3879 |
| 587 | 6476 | Lithuanian Research and Studies Center Chicago | | 4893 | 5573 | 2538 | 3879 |
| 588 | 1479 | Sun Microsystems Laboratories | | 4893 | 2049 | 2538 | 1227 |
| 589 | 6293 | Camcare Health Education and Research Institute | | 4884 | 5297 | 2538 | 3879 |
| 590 | 3152 | High Scope Educational Research Foundation | | 4884 | 823 | 2538 | 3879 |
| 591 | 4003 | Egg Nutrition Center | | 4860 | 1861 | 2538 | 3879 |
| 592 | 6853 | VA Medical Center Washington DC | | 4860 | 6177 | 2538 | 3879 |
| 593 | 2672 | Saskatchewan Research Council | | 4847 | 2493 | 2538 | 2919 |
| 594 | 5031 | Lady Davis Institute for Medical Research | | 4847 | 3419 | 2538 | 3879 |
| 595 | 3762 | Centre de Recherche Industrielle du Quebec | | 4847 | 2338 | 2538 | 3660 |
| 596 | 4022 | Bronx Lebanon Hospital Center | | 4837 | 2412 | 2489 | 3879 |
| 597 | 4400 | Health Research and Educational Trust | | 4823 | 2468 | 2538 | 3879 |
| 598 | 4062 | Arthritis Research Centre of Canada | | 4805 | 3802 | 2538 | 3410 |
| 599 | 1656 | Louisiana Universities Marine Consortium | | 4805 | 1982 | 1684 | 2733 |
| 600 | 4275 | National Research Corporation | | 4805 | 2291 | 2538 | 3879 |
