| 501 | 6572 | VA Butler Healthcare | 5476 | 6449 | 2538 | 3660 |
| 502 | 2406 | New York Blood Center | 5460 | 1151 | 1249 | 3879 |
| 503 | 7536 | Quality Enhancement Research Initiative | 5460 | 7237 | 2538 | 3879 |
| 504 | 2251 | Rocky Mountain Biological Laboratory | 5459 | 2716 | 2538 | 2249 |
| 505 | 4618 | Exeter Hospital | 5455 | 2784 | 2538 | 3879 |
| 506 | 2859 | South Texas Veterans Health Care System | 5447 | 6963 | 2538 | 649 |
| 507 | 4945 | Sonoran Spine Center | 5442 | 4259 | 2538 | 3660 |
| 508 | 5077 | Office of Public Health and Environmental Hazards | 5431 | 3441 | 2538 | 3879 |
| 509 | 3365 | Fernbank Museum | 5430 | 1042 | 2538 | 3879 |
| 510 | 1441 | Infectious Disease Research Institute | 5429 | 2620 | 1707 | 1934 |
| 511 | 4235 | Group Health Center for Health Studies | 5423 | 2160 | 2538 | 3879 |
| 512 | 4920 | Riverview Medical Center | 5399 | 3232 | 2538 | 3879 |
| 513 | 5026 | DermSurgery Associates | 5382 | 5341 | 2538 | 3410 |
| 514 | 4187 | Eskenazi Health Sidney & Lois Eskenazi Hospital Indianapolis | 5377 | 2088 | 2538 | 3879 |
| 515 | 1624 | VA Palo Alto Health Care System | 5373 | 5290 | 2538 | 233 |
| 516 | 3097 | Hunter Holmes McGuire Richmond VA Medical Center | 5336 | 6326 | 2538 | 1292 |
| 517 | 5357 | Aldo Leopold Wilderness Research Institute | 5336 | 3855 | 2538 | 3879 |
| 518 | 7405 | National Center for Ethics in Health Care | 5336 | 7056 | 2538 | 3879 |
| 519 | 3902 | Huntington Medical Research Institute | 5311 | 3513 | 1786 | 3879 |
| 520 | 5468 | Baylor Jack and Jane Hamilton Heart and Vascular Hospital | 5311 | 4022 | 2538 | 3879 |
| 521 | 3212 | VA Nebraska-Western Iowa Health Care System | 5311 | 6187 | 2538 | 1538 |
| 522 | 2653 | North Florida/South Georgia Veterans Health System | 5271 | 5832 | 2538 | 1084 |
| 523 | 1658 | Greenwood Genetics Center | 5257 | 2786 | 2151 | 2039 |
| 524 | 4281 | Saint John's Hospital Springfield | 5257 | 2256 | 2538 | 3879 |
| 525 | 4478 | Sonoran Institute | 5243 | 2572 | 2538 | 3879 |
| 526 | 4341 | Jewish Home and Hospital | 5206 | 2350 | 2538 | 3879 |
| 527 | 5706 | Methodist Sports Medicine Center | 5188 | 4406 | 2538 | 3879 |
| 528 | 4565 | Ocular Immunology and Uveitus Foundation | 5188 | 2710 | 2538 | 3879 |
| 529 | 5161 | Las Vegas Skin & Cancer Clinics Ltd | 5188 | 3569 | 2538 | 3879 |
| 530 | 4367 | Neuroscience Education Institute | 5175 | 3893 | 2538 | 3509 |
| 531 | 4161 | Powder Coating Institute | 5175 | 2067 | 2538 | 3879 |
| 532 | 5704 | Tucson Orthopaedic Institute | 5175 | 4402 | 2538 | 3879 |
| 533 | 2301 | Ralph H. Johnson VA Medical Center | 5175 | 5799 | 2538 | 722 |
| 534 | 2783 | VA NY Harbor Healthcare System | 5160 | 6444 | 2538 | 900 |
| 535 | 4048 | Truman Medical Centers | 5160 | 1898 | 2538 | 3879 |
| 536 | 2951 | Helen Keller International | 5160 | 1084 | 2538 | 3660 |
| 537 | 688 | National Institute of Health Clinical Center | 5144 | 2193 | 1411 | 368 |
| 538 | 3320 | Allergy Research Foundation | 5144 | 1560 | 2538 | 3660 |
| 539 | 4113 | Tellus Institute | 5144 | 2017 | 2538 | 3879 |
| 540 | 1398 | University of Arizona Cancer Center | 5144 | 2320 | 2538 | 911 |
| 541 | 3922 | Hahnemann University Hospital | 5123 | 2600 | 2538 | 3660 |
| 542 | 3392 | VA Medical Center Milwaukee Wisconsin | 5123 | 6158 | 2538 | 1797 |
| 543 | 1871 | San Francisco VA Medical Center | 5123 | 5913 | 2538 | 259 |
| 544 | 4053 | BioDiversity Research Institute | 5123 | 1912 | 2538 | 3879 |
| 545 | 3857 | Roger Williams Medical Center | 5115 | 3046 | 2538 | 3509 |
| 546 | 4559 | Martin's Point Health Care | 5103 | 2705 | 2538 | 3879 |
| 547 | 4994 | Kestrel Institute | 5062 | 3345 | 2538 | 3879 |
| 548 | 3084 | Texas Back Institute | 5062 | 2585 | 2538 | 3191 |
| 549 | 5516 | Native American Cancer Research | 5048 | 4129 | 2538 | 3879 |
| 550 | 4937 | Ogden Clinic | 5040 | 3284 | 2538 | 3879 |
| 551 | 5182 | New York Headache Center | 5025 | 3610 | 2538 | 3879 |
| 552 | 4542 | Alliance for Clinical Trials in Oncology (Cancer Leukemia Group B) | 5007 | 2689 | 2538 | 3879 |
| 553 | 3014 | Florida Orthopaedic Institute | 5007 | 3188 | 2538 | 2919 |
| 554 | 2173 | National Institute of Nursing Research | 4983 | 3067 | 2538 | 2002 |
| 555 | 7082 | Tripler Army Medical Center | 4983 | 6516 | 2538 | 3879 |
| 556 | 4395 | Decision Sciences Institute | 4969 | 2452 | 2538 | 3879 |
| 557 | 1860 | Maine Medical Center Research Institute | 4969 | 2981 | 2538 | 1518 |
| 558 | 2437 | VA Maryland Health Care System | 4953 | 5837 | 2538 | 873 |
| 559 | 4707 | Memorial Hospital Jacksonville | 4953 | 2971 | 2538 | 3879 |
| 560 | 717 | La Jolla Institute for Allergy & Immunology | 4947 | 2306 | 330 | 665 |
| 561 | 3295 | Alaska Sea Life Center | 4935 | 1157 | 2509 | 3879 |
| 562 | 2164 | VA Pittsburgh Healthcare System | 4935 | 5901 | 2538 | 525 |
| 563 | 4494 | Mental Health | 4916 | 2622 | 2538 | 3879 |
| 564 | 4404 | Central Institute for the Deaf St Louis | 4893 | 2469 | 2538 | 3879 |
| 565 | 6476 | Lithuanian Research and Studies Center Chicago | 4893 | 5573 | 2538 | 3879 |
| 566 | 1479 | Sun Microsystems Laboratories | 4893 | 2049 | 2538 | 1227 |
| 567 | 6293 | Camcare Health Education and Research Institute | 4884 | 5297 | 2538 | 3879 |
| 568 | 3152 | High Scope Educational Research Foundation | 4884 | 823 | 2538 | 3879 |
| 569 | 4003 | Egg Nutrition Center | 4860 | 1861 | 2538 | 3879 |
| 570 | 6853 | VA Medical Center Washington DC | 4860 | 6177 | 2538 | 3879 |
| 571 | 4022 | Bronx Lebanon Hospital Center | 4837 | 2412 | 2489 | 3879 |
| 572 | 4400 | Health Research and Educational Trust | 4823 | 2468 | 2538 | 3879 |
| 573 | 1656 | Louisiana Universities Marine Consortium | 4805 | 1982 | 1684 | 2733 |
| 574 | 4275 | National Research Corporation | 4805 | 2291 | 2538 | 3879 |
| 575 | 1624 | Oregon Social Learning Centre | 4795 | 3258 | 1957 | 1891 |
| 576 | 3807 | James S McDonnell Foundation | 4768 | 1596 | 2538 | 3879 |
| 577 | 3704 | Smithsonian Science Education Center (National Science Resources Center) | 4752 | 1463 | 2538 | 3879 |
| 578 | 3948 | Wilderness Medical Society | 4740 | 1785 | 2538 | 3879 |
| 579 | 579 | Los Angeles Biomedical Research Institute | 4731 | 1853 | 662 | 469 |
| 580 | 6095 | Outcomes Research Institute | 4719 | 5011 | 2538 | 3879 |
| 581 | 6067 | Warde Medical Laboratory | 4704 | 4979 | 2538 | 3879 |
| 582 | 3431 | Pacific Whale Foundation | 4671 | 1152 | 2538 | 3879 |
| 583 | 2800 | Children's Hospital Oakland Research Institute | 4658 | 2021 | 864 | 3879 |
| 584 | 4675 | Houston Advanced Research Center | 4658 | 2933 | 2538 | 3879 |
| 585 | 4042 | Pankey Institute | 4658 | 1933 | 2538 | 3879 |
| 586 | 789 | Monell Chemical Senses Center | 4651 | 934 | 1208 | 1572 |
| 587 | 1431 | W M Keck Observatory | 4651 | 630 | 2538 | 2460 |
| 588 | 589 | Wistar Institute | 4651 | 1380 | 660 | 763 |
| 589 | 835 | Regenstrief Institute | 4634 | 1621 | 1270 | 1074 |
| 590 | 3722 | Food and Drug Law Institute | 4634 | 1489 | 2538 | 3879 |
| 591 | 1805 | Jaeb Center for Health Research | 4622 | 3210 | 2538 | 1267 |
| 592 | 1025 | New York Eye and Ear Infirmary | 4622 | 1293 | 2319 | 1288 |
| 593 | 4667 | Washington Institute of Dermatologic Laser Surgery | 4616 | 2927 | 2538 | 3879 |
| 594 | 1466 | Hebrew Rehabilitation Center for Aged | 4616 | 1903 | 2538 | 1326 |
| 595 | 1612 | Minneapolis Heart Institute Foundation | 4605 | 2944 | 2538 | 1061 |
| 596 | 946 | Texas Biomedical Research Institute (Southwest Foundation for Biomedical Research) | 4605 | 1825 | 1477 | 1188 |
| 597 | 746 | Oregon Research Institute | 4596 | 1337 | 346 | 1380 |
| 598 | 5077 | ILSI Health and Environmental Sciences Institute | 4586 | 3505 | 2538 | 3879 |
| 599 | 5059 | Kuakini Health System | 4565 | 3479 | 2538 | 3879 |
| 600 | 3985 | National Center for Voice and Speech | 4532 | 1854 | 2538 | 3879 |
