As of 4-20-16, you can be denied a medical card if you don't sign a waiver giving all your private medical information to the DOT doctor and your company. Of course, you can't be forced to sign away your rights, but since your license is a privilege(not a right), the company can deny your right to operate their vehicles. Just another of the many ways that commercial drivers are treated as quasi-citizens in this country. And these people who run and own these company's complain of a driver shortage???? Most drivers get no overtime, low pay, long hours, crappy working conditions, have to pay fees every 5 years for background checks that are only needed once, are subject to constant surveillance by every local law enforcement unit( most of which is nothing more than easy money for the local government), spend much time away from home, are treated like crap by most of their employers(the highest turnover rates in all professions), and have one of the lowest average life spans of any career in this country(the average age of death of a trucker??? 60 years old. etc, etc, etc. American trucking company's, please stop complaining about a driver shortage, your treatment and abusive conduct is the reason.