DOT Drug Test
A federally regulated urine drug test following strict 49 CFR Part 40 procedures, required for safety-sensitive employees in DOT-regulated industries.
Key Facts
- Standard 5-panel: marijuana, cocaine, amphetamines, opioids, PCP
- Oral fluid testing approved by DOT since June 2023
- MRO reviews all non-negative results before reporting
- Chain of custody required from collection to reporting
- Pre-employment test must be negative before safety-sensitive work
DOT drug testing follows precise chain-of-custody procedures mandated by 49 CFR Part 40. The standard DOT panel tests for five drug classes: marijuana (THC), cocaine, amphetamines/methamphetamines, opioids (codeine, morphine, hydrocodone, hydromorphone, oxycodone, oxymorphone, 6-AM/heroin), and PCP. Testing is required pre-employment, randomly, post-accident, upon reasonable suspicion, return-to-duty, and for follow-up. All specimens must be analyzed by SAMHSA-certified laboratories and results reviewed by a Medical Review Officer (MRO).
Drug Testing Methods Compared
Side-by-side comparison of common workplace drug testing approaches.
| Type | Panel Size | Detection Window | Specimen | DOT Approved |
|---|---|---|---|---|
| DOT 5-Panel | 5 substances | 1–3 days | Urine or oral fluid | Yes |
| Non-DOT Panel | 5–17+ substances | 1–3 days | Urine | N/A |
| Hair Follicle | 5–17+ substances | Up to 90 days | Hair | No |
| Oral Fluid | 5–12+ substances | 24–48 hours | Saliva | Yes (since 2023) |
Frequently Asked Questions
- What does a DOT drug test screen for?
- The standard DOT 5-panel tests for five drug classes: marijuana (THC), cocaine, amphetamines and methamphetamines, opioids (including codeine, morphine, hydrocodone, hydromorphone, oxycodone, oxymorphone, and 6-AM/heroin), and PCP. All specimens are analyzed by a SAMHSA-certified laboratory and non-negative results are reviewed by a Medical Review Officer before being reported.
- When is a DOT drug test required?
- Under 49 CFR Part 40, DOT testing is required pre-employment, randomly, after qualifying accidents (post-accident), upon reasonable suspicion, before return-to-duty following a violation, and as part of follow-up testing. A pre-employment test must be negative before an employee may perform safety-sensitive duties.
- How long does a DOT drug test take to come back?
- A negative result is typically reported within 24–48 hours of the lab receiving the specimen. Non-negative (presumptive positive) results take longer because they require confirmatory testing and a Medical Review Officer verification interview, which can add several business days.
Related Services
Related Industries
Related Articles
Everything employers need to know about Non-DOT 12-Panel — who needs it, what's included, and how to find a provider through BlueHive.
Non-DOT Drug Test (10-Panel): Employer's Quick GuideEverything employers need to know about Non-DOT 10-Panel — who needs it, what's included, and how to find a provider through BlueHive.
Non-DOT Drug Test (5-Panel): Employer's Quick GuideEverything employers need to know about Non-DOT 5-Panel — who needs it, what's included, and how to find a provider through BlueHive.
50
States Covered
Need This Service?
Find certified occupational health providers offering this service in your area. Over 20,000 locations nationwide.
Simplify Occupational Health
BlueHive manages occupational health services so you can focus on your workforce.