The National Registry of Certified Medical Examiners (National Registry) is a new Federal Motor Carrier Safety Administration (FMCSA) program. All commercial drivers whose current medical certificate expires on or after May 21, 2014, at expiration of that certificate must be examined by a medical professional listed on the National Registry of Certified Medical Examiners. Only medical examiners that have completed training and successfully passed a test on FMCSA’s physical qualification standards will be listed on the National Registry.
For full information connect to US DOT website:

DOT National Registry