Life /
How to obtain EHIC (European Health Insurance Card,) in Poland? [41]
Unfortunately, no private insurance (that I know of) will cover your pre-existing condition. Blue Cross is an exception...but you will pay for it dearly and they would only cover emergencies outside the USA.
Is your daughter-in law-Polish? Does she have NFZ (state insurance)? Is so, she can add you to her policy as a relative/member of her household, with no increase in premium (and they do cover pre-existing condition).
Otherwise, you can join NFZ yourself on a voluntary basis, which in Polish is called:
Wniosek o objęcie dobrowolnym ubezpieczeniem zdrowotnym w NFZ
You will have to pay into it first (max 6,500zl) and the monthly premiums are a percentage of your income.
Here is more info on the subject (in Polish only)
nfz.gov.pl/new/index.php?katnr=2&dzialnr=1&artnr=1443