The United States Department of Transportation (FMCSA), Medical Examiner certification was developed to certify medical examiners who can determine whether a Commercial Motor Vehicle (CMV) driver meets Federal Motor Carrier Safety Administration (FMCSA) standards and guidelines. Medical examiners can be an advanced practice nurse, doctor of chiropractic, doctor of medicine, doctor of osteopathy, physician assistant, or other medical professional authorized by applicable state laws and regulations to perform physical examinations. Candidates must complete training that reviews FMCSA-specific knowledge about CMV drivers and the physical and mental demands of their job. Candidates must pass a written examination.