In Poland, you can benefit from health care in public clinics, hospitals free of charge, but in such case you should be insured. Any medical services in private clinics are subjected to charges.
Insured persons, those entitled to free health care in Poland, are also entitled to other health services provided in order to prevent diseases and injuries e.g.: early detection of diseases, treatment, care and prevention of disability.
The National Health Fund (NFZ) is a state institution that finances health care services from contributions paid by persons insured in the National Health Fund (i.e. insured persons pay a contribution to the National Health Fund, and for that receive free health care).
Website of the National Health Fund