Dr Granger is the terminally ill patient who thinks that medical staff (of whatever level) should tell a patient who they are rather than just approach and or plunge a needle in or wheel him / her away.
Apart from that, I think that, instead of being Mary or John to the patient, they should be Dr Smith or Nurse Jones.
If I'm a patient, I would not like to be Bed 4 (as Dr Granger describes), I would prefer to be Mrs Brown rather than Joanne to them. Using surnames would bring back respect. It always used to be Mr This / Mrs That or Dr This / Nurse That, didn't it? Why don't the hospital staff automatically call you by a title and surname rather than ask you what you want to be called?