CDL taken from me, Texas.

Commercial Driver License (CDL) Medical Certification Requirement | Department of Public Safety

 

Get a new med card, bring it to DMV, get upgraded class A CDL.

In the future, if you are letting your card expire you should go certify as "intra state exempt" so you keep the Class A status. Then go change it back if you want to go back on the road and refresh the med card. This might still be an option depending on your states DMV policies.

 

As long as you haven’t renewed it since it downgraded, you should be able to get it back just by providing a new medical. Otherwise, you have to go back through the whole process again.

 

Get a new physical and register it with the DMV and you're good to go.

 

This is only if you were born before 1970, if memory is correct in Texas.

 

in California if you let the medical expire automatically move you to class C, you would only have to have a very good excuse because you let it lose, (doing for example a military service in another country) otherwise you will have to go through all the exams again no matter how many years you will have driving you have to carry a school driving certificate class A

 

How long ago was it downgraded? If it was the spring of 2020, you'll have to start over like you never had a cdl.
Most states only allow a year before simply getting a medical card will restore the cdl.

 

Exactly. That is what I did with mine. No issues at all

 

Which part, getting CDL A reissued or recertifying?