I have been a MM patient for 2 years and reside in California.
The Doctor I got my card from and have been renewing through is very cool. All he requires from you to get a card is 75$ cash and either an X-ray showing injury, MRI, etc. OR you can bring in prescriptions (pain pills, anxiety pills, depression pills, muscle relaxers, etc).
After that he takes your cash, records your problem, and fills out your paperwork. The whole thing takes about 20-30minutes.