Fonasa says persons on visas can get health insura (Santiago de Chile)
Today La Tercera newspaper says that persons on short term visas and persons with RUT can sign up for Fonasa health insurance. I would investigate that if you have to health insurance.
If you go to the hospital here without insurance you can find yourself in debt for $10,000 and then blacklisted by Dicom.
Someone from an Isapres wrote here on Internations that foreigners can get Isapres private health insurance. I find that claim doubtful. I took numerous physical exams before I was able to get Isapres insurance.
I wrote something here explaining the whole insurance and medical system Protected content