Are 'blood withdrawal agreements' common in large cities?

When I need blood I:
A) Take individual to hospital (or follow)
B) Read DSMV426 and hope they refuse (normal arrest)
Or
C) Have a [bleep] warrant in hand for a 'serious' DWI that will cover multiple blood draws.

18 years.......only one issue with a nurse who simply didn't understand a warrant.

�Out of every one hundred men, ten shouldn't even be there, eighty are just targets, nine are the real fighters, and we are lucky to have them, for they make the battle. Ah, but the one, one is a warrior, and he will bring the others back.�