Modesto, California Drug Test Services


Modesto, California Drug Screening & Workplace Testing Services

Why Choose WSI in Modesto, California?

Our Services in Modesto, California

Drug Test

Random Management Programs

Physical Exams

Specialized Testing

Expert Training Programs

Background Check Services

Core Services


Reason for Test


  • Pre-Employment Test
  • Random Test
  • Post-Accident Test
  • Reasonable Suspicion Test
  • Return to Duty Test
  • Follow-up Test
  • Periodic Test

Physicals & Health Testing


  • DOT Physical
  • Physical
    • Respirator Physicals: For workers who handle hazardous substances.
    • Pulmonary Function Test
    • OSHA Medical Questionnaire
    • Lift Test
    • Chest X-Rays
    • Kraus Weber
    • EKG
    • Vision Test
      • Vision Snellen
      • Vision Titmus
      • Vision Ishihara
      • Vision Jager
  • Titer Test
    • Hepatitis A
    • Hepatitis B
    • Hepatitis C
    • TransFERRON Gold Tuberculosis
    • Measles
  • Wellness Testing

Workplace Programs and Training


Additional Services


  • FMCSA Clearinghouse Support
  • Background Checks
    • County Background Search Check
    • State Background Search Check
    • Federal Background Search Check
    • Name Alias Background Search Check
    • Sex Offender Background Search Check
    • OIG Background Search Check
    • SSN Trace Background Search Check
    • Global Terror Watch List Background Search Check
    • Adverse Action Background Search Check Assistance

FMCSA Clearinghouse Compliance Support

Interested? Contact Us

Our Locations in Modesto, California

NameAddressCityStateZIP Code
WSI Testing Location1012 Carver Road Modesto California 95350
WSI Testing Location1101 McHenry Avenue Modesto California 95350
WSI Testing Location1524 McHenry Ave Modesto California 95350
WSI Testing Location1541 Florida Ave Modesto California 95350
WSI Testing Location1064 WOODLAND AVE. Modesto California 95351
WSI Testing Location1340 MITCHELL ROAD Modesto California 95351
WSI Testing Location2112 McHenry Avenue Modesto California 95352
WSI Testing Location1008 6TH ST STE C Modesto California 95354
WSI Testing Location400 12th St Modesto California 95354
WSI Testing Location1700 Coffee Road Modesto California 95355
WSI Testing Location1800 Coffee Rd Modesto California 95355
WSI Testing Location600 Coffee Road Modesto California 95355
WSI Testing Location3600 Sisk Road Modesto California 95356