Physical examinations are mandatory for commercial motor vehicle (CMV) drivers to ensure they are physically qualified to drive. Such exams must be repeated at least every two years, although medical examiners (MEs) can choose to set a more frequent renewal cycle based on a driver’s medical condition. A successful medical exam results in the issuance of a Medical Examiner’s Certificate (MEC) — also known as the wallet card or med card — that serves as the driver’s proof of being physically qualified.

At all times, drivers and the motor carriers employing them must be able to show proof of being physically qualified to drive. This is achieved either through the med card, or for drivers with a commercial driver’s license (CDL) by means of a current driving record from the state.