| Aa | 4530 Connecticut Ave Nw Washington, DC 20008-4328 | (202) 966-9782 |
| Academy Of Radiology Research | 1029 Vermont Ave Nw Ste 505 Washington, DC 20005-3517 | (202) 347-5872 |
| ACS State Healthcare Inc | 3919 Benning Rd Ne Washington, DC 20019-3402 | (202) 388-5032 |
| Adamson Annik | 106 Irving St Nw Washington, DC 20010-2927 | (202) 882-7917 |
| Adamson Annik | 4910 Massachusetts Ave Nw Washington, DC 20016-4300 | (202) 362-2883 |
| Aicr | 1759 R St Nw Washington, DC 20009-2570 | (202) 328-7744 |
| Aids Information Line | 1407 S St Nw Washington, DC 20009-3819 | (202) 332-2437 |
| Aids Walk Washington | 1407 S St Nw Washington, DC 20009-3819 | (202) 332-9255 |
| Allhert Medical Center | 1647 Benning Rd Ne Ste 201 Washington, DC 20002-4570 | (202) 399-5707 |
| Alliance for Lung Cancer | 1747 Pennsylvania Ave Nw Washington, DC 20006 | (202) 463-2080 |
| Alsac/St Jude Children's Hospital | 3262 Worthington St Nw Washington, DC 20015 | (202) 237-8573 |
| American Auto Body | 6420 Chillum Pl Nw Washington, DC 20012-2134 | (202) 882-2005 |
| American College of Obgyn, The | 409 12th St Sw Washington, DC 20024-2125 | (202) 863-2554 |
| American Institute For Cancer Research | 1759 R St Nw Memphis, DC 20009 | (800) 843-8114 |
| American Lung Association | 530 7th St Se Fl 2 Washington, DC 20003-2731 | (202) 546-5864 |
| American Society Of Hematology | 2021 L St Nw Ste 900 Washington, DC 20036-4929 | (202) 296-1360 |
| American Society Of Hemotology | 1900 M St Nw Ste 200 Washington, DC 20036-3530 | (202) 776-0545 |
| Amerigroup Corp | 750 1st St Ne Ste 1120 Washington, DC 20002 | (202) 842-0527 |
| Amerigroup Corporation | 514 10th St Nw Washington, DC 20004-1407 | (202) 783-8207 |
| Anne Bielamowicz | 3800 Reservoir Rd Nw Washington, DC 20007 | (202) 444-8640 |
| Anxiety & Related Disorders The Ross Center Inc | 5225 Wisconsin Ave Nw Washington, DC 20015 | (202) 363-1010 |
| Argan National Laboratory | 955 Lenfant Plz Sw Ste 6000 Washington, DC 20024-2112 | (202) 488-2028 |
| Arthur G Kreischer | 4725 Massachusetts Ave Nw Washington, DC 20016 | (202) 244-9244 |
| Association For Quality Imaging | 400 Massachusetts Ave Nw Washington, DC 20001 | (202) 289-8114 |
| Austin Audrey DR | 1207 4th St Sw Washington, DC 20024-2307 | (202) 488-3297 |