Well in the US 'mandatory' insurance under the AHA removed the ability to turn someone down based on 'pre-existing' conditions.
"Starting in 2014, insurers can no longer carve out needed benefits, charge higher premiums, set lifetime limits on benefits, or deny coverage due to a person’s pre-existing condition."
Well there is an interesting one - you have the gene that causes huntingdons. You are born with it. That's about as Pre-existing as it gets - ante natal. Now please give me my insurance at nominal rates. I will be collecting soon
what is Pre-existing. The symptoms? But symptoms are just a means to tell a disease exists. The gene for huntingdons - is that a symptom?
"Starting in 2014, insurers can no longer carve out needed benefits, charge higher premiums, set lifetime limits on benefits, or deny coverage due to a person’s pre-existing condition."
http://www.healthcare.gov/law/resources/reports/preexisting....