| Business | Phone |
| Shire Laboratories 1330 Piccard Dr, Rockville 20850 | (301) 216-3850 |
| Sandler Occupational Mdcn Assc 966 Hungerford Dr # 20a, Rockville 20850 | (301) 519-6880 |
| Serono Laboratoryinc 1700 Rockville Pike, Rockville 20852 | (301) 770-5619 |
| Doctors Vascular Laboratory 9210 Corporate Blvd # 100, Rockville 20850 | (301) 330-7133 |