Can health insurance companies reject people for health care based on their past health history?

In many countries, health insurance companies cannot reject individuals for coverage based on their past health history due to regulations like the Affordable Care Act in the U.S., which prohibits such discrimination. However, in some regions or under certain plans, insurers may still be able to impose exclusions or higher premiums for pre-existing conditions. It's essential to check specific local laws and insurance policies for detailed practices regarding health history and coverage eligibility.