| Business | Phone |
| Advanced Management-Med Equip 184 Thomas Johnson Dr # 201, Frederick 21702 | (301) 698-8910 |
| Frederick Uniform 1560 Opossumtown Pike, Frederick 21702 | (301) 620-1014 |
| Gamma Medical Systems Inc 4451 Georgia Pacific Blvd # S, Frederick 21704 | (301) 874-3390 |
| Potomac Medical Llc 420 E Patrick St, Frederick 21701 | (301) 682-7800 |
| Safety Tech Intl 5703 Industry Ln, Frederick 21704 | (301) 624-5600 |
| Sera Care Bio Svc 8425 Progress Dr, Frederick 21701 | (301) 668-3410 |