Is a recent test from another carrier valid?

Sometimes. Specific timing and recordkeeping rules apply. We'll check during enrollment.

Can the driver work while waiting for results?

No — not for safety-sensitive duties. Wait for the verified negative result.

Does this satisfy the Clearinghouse requirement?

No. A pre-employment Clearinghouse query is a separate step.

Small Fleets

Pre-Employment Drug Testing for CDL Drivers

Name: Drug Testing for Truckers
Telephone: 865-992-8089

Last updated: 5/2/2026

Enroll Now Call or Text 865-992-8089

Short answer: Most CDL drivers need a verified negative DOT pre-employment drug test result and a clean FMCSA Clearinghouse query before performing any safety-sensitive function.

Why pre-employment testing matters

It's a federal requirement under 49 CFR Part 382. Letting a driver operate before the test result and Clearinghouse query are complete is a serious violation.

What's involved

A DOT 5-panel urine collection at a certified collection site
Lab analysis and Medical Review Officer verification
A pre-employment FMCSA Clearinghouse full query

Owner-operators

When you start under your own DOT authority, you are effectively your own first hire. You typically need a verified negative DOT pre-employment drug test on file.

How long does it take?

Negative results usually come back within 24-72 hours. Non-negatives go through MRO review and may take longer.

Where to take the test

Use our find a DOT collection site tool or contact us for a referral.

Need to set up a pre-employment DOT drug test?

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Frequently Asked Questions

Ready to get your DOT drug testing program set up?

Enroll today or talk to us about your fleet. We help owner-operators and small trucking companies get set up quickly.