| Business | Phone |
| Advanced Biosystems Inc 10900 University Blvd, Manassas 20110 | (703) 993-8410 |
| Quest Diagnostics Inc 8701 Digges Rd, Manassas 20110 | (703) 330-7820 |
| Laboratory Corp Of America 8609 Sudley Rd, Manassas 20110 | (703) 530-0501 |
| Labcorp 8910 Centreville Rd, Manassas 20110 | (703) 257-4757 |
| American Medical Lab 8640 Sudley Rd, Manassas 20110 | (703) 369-2484 |