If you are living and working in Switzerland full time and not here as a student or someone similar then it is law to have Swiss health Insurance. My partner was here with UK insurance for four years and we had twins born here with UK insurance. No problems. Then the Kanton authorities stated that we had to have local insurance and there is no way round it, its law.

The exeptions are students, au pairs and the like who are here for a temporary period of time, before returning to their home country.