A Medical Review Officer (MRO) is a licensed physician responsible for receiving and reviewing laboratory results generated by an employer's drug testing program and evaluating medical explanations for test results. More information on MROs is available online at http://www.dot.gov/ost/dapc/mro.html.

Medical Examiner means a person who is licensed, certified, or registered, in accordance with applicable State laws and regulations to perform physical examinations. This includes but is not limited to doctors of medicine, doctors of osteopathy, physician assistants, advanced practice nurses and doctors of chiropractic.

Last Updated : April 1, 2014