| 501 | 5669 | Iowa Heart Center |  | 6571 | 4190 | 2538 | 3879 |
| 502 | 6988 | IRIS Independent Research | | 7752 | 6061 | 2538 | 3879 |
| 503 | 385 | ITER | | 1347 | 278 | 1010 | 1236 |
| 504 | 306 | J. Craig Venter Institute | | 1615 | 480 | 356 | 681 |
| 505 | 1428 | Jackson Health System (Memorial Hospital) | | 2723 | 1617 | 2538 | 1518 |
| 506 | 157 | Jackson Laboratory | | 151 | 262 | 85 | 505 |
| 507 | 1805 | Jaeb Center for Health Research | | 4622 | 3210 | 2538 | 1267 |
| 508 | 2944 | James A. Haley Veterans' Hospital | | 6132 | 5682 | 2538 | 1534 |
| 509 | 3125 | James J. Peters VA Medical Center Bronx NY | | 6779 | 6927 | 2538 | 839 |
| 510 | 3807 | James S McDonnell Foundation | | 4768 | 1596 | 2538 | 3879 |
| 511 | 3108 | Jefferson University Hospitals (Thomas Jefferson University Hospital) | | 2134 | 879 | 2538 | 3879 |
| 512 | 5924 | Jeffrey Modell Foundation | | 7707 | 4380 | 2538 | 3879 |
| 513 | 2866 | Jesse Brown VA Medical Center | | 6910 | 6300 | 2538 | 981 |
| 514 | 52 | Jet Propulsion Laboratory | | 50 | 241 | 48 | 77 |
| 515 | 776 | Jewish General Hospital |  | 560 | 1432 | 2538 | 282 |
| 516 | 4341 | Jewish Home and Hospital | | 5206 | 2350 | 2538 | 3879 |
| 517 | 4351 | JFK Medical Center (New Jersey Neuroscience Institute) | | 3861 | 2474 | 2538 | 3879 |
| 518 | 3538 | John D. Dingell VA Medical Center Detroit Michigan | | 6983 | 6212 | 2538 | 1843 |
| 519 | 53 | Johns Hopkins Medicine | | 370 | 45 | 2538 | 15 |
| 520 | 1027 | Johns Hopkins University Applied Physics Laboratory | | 490 | 99 | 147 | 3879 |
| 521 | 7654 | Joint Replacement Institute | | 7598 | 7312 | 2538 | 3879 |
| 522 | 5081 | Joseph W. Jones Ecological Research Center | | 8011 | 4210 | 2179 | 3879 |
| 523 | 565 | Joslin Diabetes Center & Joslin Clinic | | 1958 | 388 | 2538 | 579 |
| 524 | 163 | Kaiser Permanente | | 117 | 96 | 2538 | 119 |
| 525 | 4332 | Kansas City VA Medical Center | | 7149 | 7061 | 2538 | 1960 |
| 526 | 3538 | Kansas Health Institute | | 2310 | 1383 | 2538 | 3879 |
| 527 | 4196 | Kantar Health (Consumer Health Sciences) | | 4514 | 2154 | 2538 | 3879 |
| 528 | 4231 | Kelsey-Seybold Clinic | | 2876 | 2364 | 2538 | 3879 |
| 529 | 304 | Kennedy Krieger Institute | | 2023 | 644 | 151 | 580 |
| 530 | 4243 | Kentucky Science Center Louisville | | 6716 | 2050 | 2538 | 3879 |
| 531 | 3207 | Kerlan-Jobe Orthopaedic Clinic | | 6890 | 3288 | 2538 | 2981 |
| 532 | 2930 | Kessler Foundation | | 3920 | 1831 | 1630 | 3879 |
| 533 | 2421 | Kessler Rehabilitation Corporation | | 6351 | 2473 | 2538 | 2584 |
| 534 | 4994 | Kestrel Institute | | 5062 | 3345 | 2538 | 3879 |
| 535 | 1303 | Kingston General Hospital | | 2442 | 2323 | 2538 | 780 |
| 536 | 5488 | Kronos Early Estrogen Prevention Study (Kronos Longevity Research Institute) | | 7904 | 3482 | 2538 | 3879 |
| 537 | 5059 | Kuakini Health System | | 4565 | 3479 | 2538 | 3879 |
| 538 | 7442 | Kushner Electroplating School | | 7775 | 6874 | 2538 | 3879 |
| 539 | 6310 | La Familia Medical Center | | 7068 | 5106 | 2538 | 3879 |
| 540 | 5773 | La Jolla Bioengineering Institute | | 7712 | 6559 | 2538 | 3191 |
| 541 | 717 | La Jolla Institute for Allergy & Immunology | | 4947 | 2306 | 330 | 665 |
| 542 | 5031 | Lady Davis Institute for Medical Research | | 4847 | 3419 | 2538 | 3879 |
| 543 | 7921 | Lafayette Clinic | | 7864 | 7767 | 2538 | 3879 |
| 544 | 1292 | Lahey Clinic Medical Center | | 1624 | 1026 | 1451 | 2867 |
| 545 | 7637 | Lake Champlain Gynecologic Oncology | | 7676 | 7254 | 2538 | 3879 |
| 546 | 2819 | Land Institute | | 5506 | 1043 | 2304 | 3879 |
| 547 | 2169 | Lankenau Institute for Medical Research | | 7984 | 4962 | 1780 | 1649 |
| 548 | 5161 | Las Vegas Skin & Cancer Clinics Ltd | | 5188 | 3569 | 2538 | 3879 |
| 549 | 11 | Lawrence Berkeley National Laboratory | | 37 | 26 | 5 | 21 |
| 550 | 33 | Lawrence Livermore National Laboratory | | 260 | 70 | 58 | 85 |
| 551 | 4945 | Lawrenceville Plasma Physics Fusion | | 4402 | 3337 | 2538 | 3879 |
| 552 | 1396 | Lawson Health Research Institute | | 4255 | 2339 | 2538 | 916 |
| 553 | 3699 | Lean Construction Institute | | 3025 | 1549 | 2538 | 3879 |
| 554 | 6375 | Learning Research & Development Center | | 4049 | 5466 | 2538 | 3879 |
| 555 | 6237 | Lebanon VA Medical Center | | 6138 | 7193 | 2538 | 3191 |
| 556 | 4457 | Lexington VA Medical Center | | 6479 | 6436 | 2538 | 2555 |
| 557 | 724 | Library of Congress | | 9 | 5 | 2394 | 3879 |
| 558 | 1883 | Lifespan | | 1703 | 807 | 475 | 3879 |
| 559 | 6969 | Lincoln Medical and Mental Health Center | | 7155 | 6193 | 2538 | 3879 |
| 560 | 6476 | Lithuanian Research and Studies Center Chicago | | 4893 | 5573 | 2538 | 3879 |
| 561 | 322 | London Health Sciences Centre | | 1129 | 901 | 166 | 438 |
| 562 | 1566 | Long Beach Memorial Medical Center | | 1341 | 931 | 2538 | 2510 |
| 563 | 3086 | Long Term Ecological Research Network | | 792 | 913 | 2538 | 3879 |
| 564 | 26 | Los Alamos National Laboratory | | 246 | 66 | 20 | 62 |
| 565 | 579 | Los Angeles Biomedical Research Institute | | 4731 | 1853 | 662 | 469 |
| 566 | 7709 | Louis A Johnson VA Medical Center Clarksburg | | 6584 | 7487 | 2538 | 3879 |
| 567 | 2445 | Louis Stokes Cleveland VA Medical Center | | 6295 | 6045 | 2538 | 698 |
| 568 | 781 | Louisiana State University Agricultural Center | | 427 | 514 | 2538 | 1015 |
| 569 | 1656 | Louisiana Universities Marine Consortium | | 4805 | 1982 | 1684 | 2733 |
| 570 | 5126 | Louisville Metabolic and Atherosclerosis Research Center | | 7775 | 7018 | 2538 | 2510 |
| 571 | 3438 | Louisville VA Medical Center | | 6442 | 6006 | 2538 | 1891 |
| 572 | 2295 | Lovelace Respiratory Research Institute | | 7576 | 3506 | 2411 | 2249 |
| 573 | 732 | Lowell Observatory | | 2221 | 579 | 2024 | 1581 |
| 574 | 2040 | Loyola Law School los Angeles | | 1267 | 605 | 1848 | 3879 |
| 575 | 696 | Loyola University Medical Center | | 2481 | 836 | 2538 | 390 |
| 576 | 1193 | Lunar and Planetary Institute | | 262 | 2158 | 2086 | 1556 |
| 577 | 7179 | Lunar Research Institute | | 7472 | 6481 | 2538 | 3879 |
| 578 | 259 | Lurie Children's Hospital of Chicago (Children's Memorial Hospital) | | 1458 | 566 | 741 | 324 |
| 579 | 6265 | Lynn Health Science Institute | | 7630 | 6257 | 2538 | 3509 |
| 580 | 1645 | Magee-Womens Research Institute | | 6138 | 2922 | 2538 | 1057 |
| 581 | 924 | Maimonides Medical Center Brooklyn New York | | 3327 | 1412 | 1598 | 1490 |
| 582 | 6307 | Maine Center for Cancer Medicine and Blood Disorders | | 7061 | 5101 | 2538 | 3879 |
| 583 | 5500 | Maine Environmental Policy Institute | | 6997 | 3857 | 2538 | 3879 |
| 584 | 1299 | Maine Health | | 1771 | 854 | 2538 | 1960 |
| 585 | 1860 | Maine Medical Center Research Institute | | 4969 | 2981 | 2538 | 1518 |
| 586 | 3981 | Mallinckrodt Institute of Radiology | | 4468 | 4515 | 778 | 3879 |
| 587 | 4534 | Marcus Institute | | 6475 | 2547 | 2538 | 3879 |
| 588 | 237 | Marine Biological Laboratory | | 964 | 307 | 254 | 690 |
| 589 | 2848 | Marine Mammal Center | | 2903 | 640 | 2538 | 3879 |
| 590 | 5418 | Marine Spill Response Corporation | | 6260 | 3840 | 2538 | 3879 |
| 591 | 7330 | Marion VA Medical Center | | 6580 | 6842 | 2538 | 3879 |
| 592 | 1481 | Marlborough Hospital | | 2221 | 1268 | 2538 | 1960 |
| 593 | 536 | Marshfield Clinic | | 1933 | 777 | 1582 | 930 |
| 594 | 4559 | Martin's Point Health Care | | 5103 | 2705 | 2538 | 3879 |
| 595 | 3171 | Mason Research Institute | | 4122 | 2382 | 1484 | 3879 |
| 596 | 3291 | Masonic Medical Research Laboratory | | 7292 | 3841 | 2538 | 2782 |
| 597 | 714 | Massachusetts Eye and Ear Infirmary | | 2895 | 834 | 2538 | 408 |
| 598 | 87 | Massachusetts General Hospital | | 539 | 106 | 2538 | 10 |
| 599 | 5171 | Materials Research Science & Engineering Centers | | 4140 | 3658 | 2538 | 3879 |
| 600 | 542 | Mathematica Policy Research | | 1494 | 637 | 830 | 1454 |
