Company Name | City | State | Zip |
| 24/7 Mobile Drug & Alcohol Testing | Watauga | TX | 76148 |
| 3 Strong Group | McKees Rock | PA | 15136 |
| A Worksafe Service, Inc. | Salem | OR | 97301 |
| A&D Drug Screen Collections, LLC | Goodland | KS | 67735 |
| A&D Tests, Inc. | Waco | TX | 76712 |
| A&D Tests, Inc. | San Antonio | TX | 78228 |
| A&D Tests, Inc. | Temple | TX | 76504 |
| A&D Tests, Inc. | Killeeen | TX | 76542 |
| A&D Tests, Inc. | Waco | TX | 76712 |
| AA Pre-Employment | Columbus | OH | 43206 |
| AAA Medical Compliance Testing, Inc | Lake Worth | FL | 33461 |
| AADMS Alabama Alcohol Drug Management Services | Prattville | AL | 36066 |
| Abso | Roseville | CA | 95678 |
| Absolute Drug & DNA Testing Center | Las Vegas | NV | 89101 |
| ABX Air, Inc. | Wilmington | OH | 45177 |
| Accu-Chem Laboratories | Richardson | TX | 75081-6698 |
| AccuDiagnostics | Greenville | SC | 29607 |
| AccuDiagnostics | Sullivans Island | SC | 29482 |
| AccuDiagnostics | Spartanburg | SC | 29306 |
| AccuDiagnostics | Lima | OH | 45805 |
| AccuDiagnostics | Lawrenceville | GA | 30045 |
| AccuDiagnostics | Lexington | KY | 40515 |
| Accudiagnostics - Florence | Florence | SC | 29501 |
| Accudiagnostics - Myrtle Beach | Myrtle Beach | SC | 29577 |
| Accupro Screening | Honolulu | HI | 96826 |
| Accuracy First Diagnostics | Gastonia | NC | 28054 |
| Accurate C&S Services | Oakland | CA | 94621 |
| Accurate DNA & Drug Testing | Petaluma | CA | 94952 |
| Accurate Employment Screening, LTD/AES | Perrysburg | OH | 43551-3352 |
| Accurate Screen, LLC | White Cloud | MI | 49349 |
| Accurate Testing Services | McKinleyville | CA | 95519 |
| Accu-Screen Labs., Inc. dba ASl Testing | Elkhart | IN | 46514 |
| AccuScreen Systems | Baton Rouge | LA | 70802 |
| AccuSearch, Inc. | Phoenix | AZ | 85021-9339 |
| AccuTrace Testing, Inc | Arlington | TX | 76017 |
| A-Check America, Inc. | Riverside | CA | 92507 |
| ACL Laboratories | Rosemont | IL | 60018 |
| ACM Medical Laboratory | Rochester | NY | 14624 |
| Acosta Medical Testing Corporation | Oak Lawn | IL | 60453 |
| Acosta Medical Testing Corporation | Hammond | IN | 46324 |
| Acosta Medical Testing Corporation | New Iberia | LA | 40563 |
| Acosta Medical Testing Corporation | Lennon | MI | 48449 |
| Acosta Medical Testing Corporation | Duluth | MN | 55806 |
| Acro Biotech | Rancho Cucamonga | CA | 91730 |
| ADAMS Occupational Health Management | Chelsea | MI | 48118 |
| ADC Test Clinics (American Diagnostics) | Portland | OR | 97232 |
| ADC Test Clinics, Inc. (American Diagnostics) | Vancouver | WA | 98662 |
| Addiction Medical Consults/AMC | Redlands | CA | 92375 |
| Addiction Medicine Consultants, Inc | Redlands | CA | 92375 |
| Additional Testing, Inc. | Roseville | MN | 55113 |
| Adena Health System Occupational Health | Chillicothe | OH | 45601-9031 |
| Adena Occupational Health | Chillicothe | OH | 45601-9031 |
| AdMed Consulting, Inc. | Bismark | ND | 58504 |
| Admin. 2000, Inc. | Sorrento | FL | 32776 |
| ADTS / Aurora Drug Testing Service | Buffalo | NY | 14215 |
| Advanced Business Intervention/National Medical Services, Inc | John Day | OR | 97845 |
| Advanced Diagnostic Services, Inc. | Vancouver | WA | 98665 |
| Advanced Drug Detection, Inc. | Nampa | ID | 83605 |
| Advanced Drug Testing Services, LLC | Kailua-Kona | HI | 96740 |
| Advanced Occupational Safety Solutions | Wilmington | MA | 01887 |
| Advanced Toxicology Network (ATN) | Memphis | TN | 38118 |
| Advanced Workplace Strategies, Inc. | Tustin | CA | 92780 |
| Advantage Testing & Professional Services | Jackson | WY | 83002 |
| AdvantageCare, Inc. | Orlando | FL | 32819 |
| Aegis Sciences Corporation | Nashville | TN | 37210 |
| AFC Urgent Care Chapman Highway | Knoxville | TN | 37920 |
| AFC Urgent Care Chattanooga | Chattanooga | TN | 37312 |
| AFC Urgent Care Cleveland | Cleveland | TN | 37312 |
| AFC Urgent Care Farragut | Farragut | TN | 37934 |
| AFC Urgent Care Fountain City | Knoxville | TN | 37918 |
| AFC Urgent Care Hixson | Hixson | TN | 37343 |
| AFC Urgent Care Knoxville | Knoxville | TN | 37919 |
| AFC Urgent Care Ooltewah | Ooltewah | TN | 37363 |
| AFC Urgent Care Sevierville | Sevierville | TN | 37876 |
| Affiliated Healthcare Systems | Bangor | ME | 04402 |
| Affiliated Service Alliance, Inc | Boynton Beach | FL | 33426 |
| Affordable On-Sites, Inc. | Durham | NC | 27705 |
| Agilent Technologies | Wilmington | DE | 19808 |
| AGL Resources | Atlanta | GA | 30302 |
| Ahead of the Kurve, LLC | Boise | ID | 83707 |
| AHS Walk In Clinic | Lafayette | LA | 70508 |
| Airborne Express | Wilmington | OH | 45177-9398 |
| Alabama Specialty Clinic | Cullman | AL | 35055 |
| Alaska Monitoring Services, LLC | Anchorage | AK | 99501 |
| Albany Family & Specialty Medicine | Albany | OR | 97322 |
| Alcohol & Drug Testing Associates, Inc | Reno | NV | 89502 |
| Alcohol & Drug Testing Services | Woodbridge | VA | 22192 |
| Alcohol & Drug Testing Services | Hot Springs | AR | 71913 |
| Alcohol & Drug Testing Services | Hot Springs | AR | 71913 |
| Alcohol & Drug Testing Services, LLC | Douglas | WY | 82633 |
| Alcohol & Drug Testing Services/ADTS | Hot Springs | AR | 71913 |
| Alcohol and Drug Testing, Inc. | Oklahoma City | OK | 73149-5200 |
| Alcohol Substance Admin. Plus | Watertown | NY | 13601 |
| AlcoPro, Inc. | Knoxville | TN | 37939-0954 |
| Alexian Brothers Corporate Health | Elk Grove Village | IL | 60007 |
| Alfa Scientific Designs, Inc. | Poway | CA | 92064 |
| All American Research and Drug Testing | Irving | TX | 75063 |
| Allcheck | Clearbrook | MN | 56634 |
| Allen Occupational Health | Waterloo | IA | 50703 |
| Alliance Medical Group dba Primary Health Medical Group | Boise | ID | 83719 |
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