Cornerstone Your Foundation On the Road to Safety and Compliance

Cornerstone Diagnostics partners with SAMHSA certified labs. We are a CAP Forensic, and CLIA certified laboratory that adheres to strict Chain of Custody procedures, to ensure sample identification and integrity are maintained from the point of collection to the final result. We offer a comprehensive catalog of DOT testing collection services to inform your decision making.

• Pre-Employment Testing
• Drug-Free Workplace Testing
• Ensure compliance through random pool testing
• Reasonable Suspicion
• Random Drug Testing
• Post-Accident