Support Center
We are here for you. Get the most out of Med-Stop.
For Medical Review Officers
Last Updated: 09/24/2026
This section is for Medical Review Officers (MROs) and MRO staff who review drug test results through Med-Stop. It explains the MRO role, how Med-Stop supports MRO reporting, and the procedures Med-Stop follows for specific review situations.
Where a topic here and the regulation differ, the regulation governs: 49 CFR Part 40, Subpart G for DOT testing.
The MRO role
| Topic | What it covers |
|---|---|
| What a Medical Review Officer does | The MRO's job in DOT testing, Clearinghouse reporting duties, and how Med-Stop MRO automates reporting. |
| What does an MRO-verified negative result mean? | What a verified negative result means for the employee and the employer. |
| Why did the MRO contact me about my test? | Why an MRO contacts a donor before verifying a result. |
Review procedures
| Topic | What it covers |
|---|---|
| 4.3 Multiple results or collections in one testing event | How to reconcile and report more than one result, or more than one specimen, from the same testing event (see issues: link pending). |
| MRO quarterly quality assurance review | How Med-Stop selects and tracks the quarterly MRO review of staff-reviewed negatives (sign-in required). |
Regulations and guidance
Do you need more information?
If you need our assistance, or want to know more about Med-Stop, please use our Support contact form, send e-mail to support@med-stop.com or call at 1-(877) 633-3633