Stefano:
bad news, in Poland they don't know that EKUZ exist! they have given to my girlfriend a simply national insurance card, no valid in italy where it is necessary the EHIC card!
no words:-(
This is rubbish. I am Belgian, living in Warsaw for four years now, and when I go back home every for months or so, I have my "książka" stamped at work. Download and print and complete the EKUZ form from the NFZ website....and then go to the NFZ office behind the Marriott.
The crowds are always endless there, true, but the staff is always helpful. You need to be patient though :) Bringing a book helps when you have 120 persons in front of you :)