Medical Review Officer

Promoting and Preserving the Highest Quality of Standards Among MROs and Their Teams.

DOT Publishes Notice of Proposed Rule Making - Oral Fluids


The U.S. Department of Transportation is proposing to amend the transportation industry drug testing program procedures regulation to include oral fluid testing. Published on February 28, 2022 in the Federal Register is a DOT Notice of Proposed Rulemaking (NPRM). The NPRM is available at it has also been posted on the ODAPC webpage at

Comments to the notice of proposed rulemaking should be submitted by April 29, 2022.


The Medical Review Officer (MRO) field is complex and rapidly evolving due to technical advances, regulatory changes, and new patterns of abuse. Testing for substances of abuse is now the rule rather than the exception in settings as diverse as the workplace, the doctor's office, and many schools throughout the country. The Drug-Free Workplace Act affects all federal agencies. Mandatory alcohol and drug testing is now required of all intrastate truckers, commercial driver's license holders, and other transportation workers. Joint government agreements between the United States, Canada, and Mexico monitor truckers crossing international borders. Federal regulations require MRO qualification and re-qualification training followed by certification and recertification by a nationally recognized Medical Review Officer Certification board every 5 years.

  • MRO Drug Testing


    Registration and Examination

    MROCC Medical Review Officer certification is DOT and SAMHSA recognized and approved. The exams are based on 49 Code of Federal Regulations (CFR Part 40) and the MRO Competencies Document. As mandated by the DOT, Medical Review Officer certification is valid for five years, at which time recertification is required to remain within DOT compliance and in the directory of currently-certified MROs.

  • MRO



    MROCC offers certification and recertification examinations in both online and onsite formats to physicians who have completed appropriate Medical Review Officer training. MROCC-approved onsite MRO courses are given multiple times per year and are required for initial certification. A convenient, no-travel, CME activity is available for those who are recertifying.