It appears that if an immigrant was previously in a public health care system in their country of origin, they would qualify: https://www.tk.de/firmenkunden/ve

It appears that if an immigrant was previously in a public health care system in their country of origin, they would qualify: https://www.tk.de/firmenkunden/versicherung/tk-service-ausland/beschaeftigung-auslaendischer-mitarbeiter/altersgrenze-eu-auslaender-2046102?tkcm=aaus https://www.tk.de/firmenkunden/versicherung/tk-service-ausla... https://www.krankenkassen.de/incoming/leben/nicht-erwerbstaetig/ https://www.krankenkassen.de/incoming/leben/nicht-erwerbstae... That would cover most EU countries, though probably not the US (assuming that "private, but mandatory" does not qualify as "public").