 In comparison with health insurance in other countries, private health insurance in Israel is considered comparatively inexpensive, but premiums are based on age, gender, and unlike the supplemental coverage offered by the health funds also depend on pre-existing conditions and previous medical history.As of 2017, approximately one third of Israelis purchase some level of private health insurance coverage.Frequently this coverage at least partially overlaps with the supplemental coverage offered by the health funds, meaning that some subscribers pay twice for the same coverage (and which is usually less expensive when obtained through the health funds' supplemental plans).