| Business | Phone |
| Amc Drug Testing Inc Denver 80204 | (720) 946-0933 |
| Drug-Techs Llc 8333 Greenwood Blvd # 2g, Denver 80221 | (303) 650-4151 |
| Compliance Administrative Svc Denver 80216 | (303) 227-0512 |
| United Screening Svc 8380 Zuni St, Denver 80221 | (303) 426-4000 |
| Wiz-Quiz Denver 1410 Grant St, Denver 80203 | (720) 377-3440 |