| Business | Phone |
| Quest Diagnostics Inc 10301 Georgia Ave, Silver Spring 20902 | (301) 592-0436 |
| Quest Diagnostics Inc 344 University Blvd W # 212, Silver Spring 20901 | (301) 681-1666 |
| Quest Diagnostics Inc 831 University Blvd E, Silver Spring 20903 | (301) 445-5039 |
| Laboratory Corp Of America 11120 New Hampshire Ave # 306, Silver Spring 20904 | (301) 681-8591 |
| Laboratory Corp Of America 3927 Ferrara Dr, Silver Spring 20906 | (301) 942-0673 |
| J T Crowns 2905 Harris Ave, Silver Spring 20902 | (301) 949-6666 |