There’s different tiers, but in the case of a doctor visit and prescriptions for medication, you typically have a copay amount which insurance does not cover. If you have a serious illness and require treatment in the hospital you would be required to pay 30%-40% of the total bill. Also some insurance requires that you pay a certain amount per year before it will take effect, then the insurance pays the rest for the year. There’s tons of different plans and scenarios, it’s all a rip off.