When Precision in Toxicology Is the Only Answer, Who Do You Trust?
Bio-Tox Laboratories delivers uncompromising accuracy in workplace drug screening, forensic toxicology, and clinical diagnostics — right here in Riverside, California.
Comprehensive Toxicology & Testing Services
From employer-mandated screenings to complex forensic analysis, our certified laboratory provides the accuracy and compliance your organization demands.
Workplace Drug Screening
SAMHSA-certified pre-employment, random, and post-accident drug panels. We handle high-volume collections with chain-of-custody protocols that stand up to scrutiny.
Forensic Toxicology
Quantitative and qualitative analysis for legal proceedings, impairment cases, and post-mortem examinations. Every result is documented to forensic standards.
Clinical Diagnostics
Comprehensive clinical testing including therapeutic drug monitoring, hormone panels, and specialized biochemical assays ordered by licensed healthcare providers.
DOT Compliance Testing
Full Department of Transportation compliant testing for commercial drivers. We follow all FMCSA guidelines and provide immediate negative confirmation reporting.
Specimen Analysis
Advanced analysis of biological specimens including blood, urine, hair, and oral fluid using GC/MS and LC-MS/MS confirmation methodologies.
Corporate Wellness Programs
Tailored health screening packages for organizations that prioritize employee well-being. We work with your HR team to design programs that fit your culture.
A Legacy of Scientific Integrity in Riverside
Bio-Tox Laboratories was founded on a singular conviction: that the communities we serve deserve testing results they can stake their careers and lives on. Located in the heart of Riverside at 1965 Chicago Avenue, our facility combines cutting-edge analytical instrumentation with the meticulous attention to detail that defines true clinical excellence.
Our team holds certifications from the Substance Abuse and Mental Health Services Administration and maintains accreditation through recognized clinical laboratory standards. Every specimen that enters our facility is tracked through a rigorous chain-of-custody process, ensuring that results are defensible in any setting — from the boardroom to the courtroom.
From Collection to Confirmation
Our streamlined process ensures every specimen is handled with the utmost care — from the moment of collection to the final reported result.
Schedule & Collect
Book your appointment at our Riverside facility or arrange an on-site collection. Our trained collectors follow strict protocol for specimen integrity.
Analyze & Verify
Specimens undergo initial screening followed by GC/MS or LC-MS/MS confirmation. Every positive result is verified by our senior toxicologists.
Review & Report
A Medical Review Officer evaluates all non-negative results before reporting. You receive a comprehensive, easy-to-understand report within 24–48 hours.
Ready to Partner with a Laboratory You Can Rely On?
Whether you need a single screening or a comprehensive corporate wellness program, Bio-Tox Laboratories is here to deliver results that protect your people and your organization.
Visit Our Riverside Laboratory
We welcome walk-in collections during business hours and accept referrals from employers, healthcare providers, and legal professionals throughout the Inland Empire.
1965 Chicago Ave
Riverside, CA 92507-2370
Monday – Friday: 8:00 AM – 5:00 PM
Saturday – Sunday: Closed
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