In order to keep your CDL, some states will allow a CDL holder to certify in a category that does not require a medical certificate e.g.
Not all medical examiner’s offices that conduct DOT physicals have a drug testing service. Just look on your medical card and find the examiner’s phone number. They may charge you a few bucks for the service, but it’s cheaper than a new examination.
Do I need to have a medical certificate if I operate a CMV only in my home state?
If a truck has a DOT# on its side, does the driver need a medical card to drive it?
Is the DOT medical card transferrable or do I have to get a new one when I start a new job? Can I get a copy of my DOT physical long form or will I have to take another physical? What if I recently developed a medical condition that I couldn’t drive. Can my Company have different medical requirements than the FMCSA requirements?
Is there a difference between a DOT medical certificate and a DOT physical card? What do I do if my medical card gets lost or damaged? Can my new employer make me get a DOT physical even if my current medical certificate is still valid for another 18 months?