"When I inspect one of these facilities and I see a piece of equipment with a cord cap on it that has a green dot on it, I expect the circuit supplying this piece of equipment to comply with Article 517."
"On the other hand the "hospital plug" might just be there to please the guy who spent so much money on the hospital receptacles"
I'd say that the instructions for the device in question should be the deciding factor. If it says "This equipment must be . . ." then it must be.