| Business | Phone |
| Afc 431 E Diamond Ave # A, Gaithersburg 20877 | (301) 990-1407 |
| American Red Cross 9319 Gaither Rd, Gaithersburg 20877 | (301) 212-2700 |
| Roboz Surgical Instrument Co 200 Girard St # 207, Gaithersburg 20877 | (301) 590-0055 |
| Dexall Biomedical Labs Inc 18904 Bonanza Way, Gaithersburg 20879 | (301) 840-1884 |
| Digene Corp 1201 Clopper Rd, Gaithersburg 20878 | (301) 944-7000 |
| Orthodontics Supply & Equip Co 7851 Airpark Rd # 202, Gaithersburg 20879 | (301) 330-5656 |
| Foi Services Inc Library 11 Firstfield Rd, Gaithersburg 20878 | (301) 975-9400 |
| National Institute Of Standard 100 Bureau Dr # 2322 # 204, Gaithersburg 20899 | (301) 975-6776 |
| Fusion Uv Systems 910 Clopper Rd, Gaithersburg 20878 | (301) 990-8700 |
| Medispec Limited Inc 19110 Montgomery Village Ave, Gaithersburg 20886 | (301) 963-5561 |
| Harta Corp 8 Russell Ave # 106, Gaithersburg 20877 | (301) 948-8868 |
| Immersion Medical 55 W Watkins Mill Rd, Gaithersburg 20878 | (301) 984-3706 |