| Business | Phone |
| Community Accessment Svc 605 W Olympic Blvd # 605, Los Angeles 90015 | (213) 895-7700 |
| Drug Free La 6333 Wilshire Blvd # 301, Los Angeles 90048 | (323) 852-4730 |
| Employer Assurance- Drug Testing Los Angeles - Background Checks Service 10642 Santa Monica Blvd., Suite 205, Los Angeles 90025 | (424) 248-0780 |
| Origin Diagnostics 8219 Wilshire Blvd, Los Angeles 90210 | (800) 440-6695 |