Drug Services Band 3 Box 2

MRO Services


A Medical Review Officer (MRO) is a licensed physician who reviews laboratory results generated by an employer’s drug testing program. They are responsible for evaluating medical explanations for certain drug test results. DOT results are reviewed by an MRO as required by law. In addition, some states require MRO review of either positive-only or positive and negative non-DOT results.

We strongly encourage clients to utilize an MRO even when not legally required. The MRO review is just another step in creating a solid and defensible drug testing policy. In addition, it relieves the employer from having to discuss positive test results with an applicant or employee. Since employers are only charged for MRO services when used, costs are kept at a minimum.