I never give them my insurance card and givr them a bogus name
I learned that one a long time ago before I had medical insurance and was paying with cash.
Always used an alias name and address and birthdate.
My medical records are as clean as a whistle.
Doing so my medical insurance is much lower now by lying on the trick questions back in my youth about, do you smoke ? Nope. Have you ever smoked ? Nope. Do you do recreational drugs ? Nope. Have you ever had an STD ? Nope. Does your family have a history of cancer ? Nope.
Today they make a copy of your drivers license so they can verify your social security number which screws you.
Poland will catch up soon on the tricks of the trade.