| Business | Phone |
| B & W Stat Laboratory 3104 Georgia Ave Nw, Washington 20010 | (202) 726-0842 |
| Bryce Clinical Labs 650 Pennsylvania Ave Se, Washington 20003 | (202) 543-9005 |
| Edi Inc 4401 Connecticut Ave Nw, Washington 20008 | (202) 289-7921 |
| Fairfax Medical Laboratory 1145 19th St Nw, Washington 20036 | (202) 857-1601 |
| Laboratory Corp Of America 1145 19th St Nw # 702, Washington 20036 | (202) 293-9225 |
| Laboratory Corp Of America 2021 K St Nw # 725, Washington 20006 | (202) 822-5067 |
| Penn Med Laboratories 650 Pennsylvania Ave Se, Washington 20003 | (202) 675-4760 |
| Quest Diagnostics Inc 2141 K St Nw, Washington 20037 | (202) 296-9751 |
| Quest Diagnostics Inc 815 Connecticut Ave Nw, Washington 20006 | (202) 263-6260 |
| Quest Diagnostics Inc 935 Pennsylvania Ave Nw, Washington 20535 | (202) 783-3595 |
| Starbroek Laboratories Corp 6323 Georgia Ave Nw # 102, Washington 20011 | (202) 829-1333 |