Health insurance is a product that covers your medical expenses. Like auto insurance covers your car if you get into an accident, health insurance covers you if you get sick or injured. Health insurance also covers preventive care – i.e., doctors visits and tests before you get sick. Health insurance doesn’t always cover 100% of your costs. In fact, it’s designed to share costs with you up until a certain point, called the out-of-pocket limit. After you hit the out-of-pocket limit, health insurance will pay 100% of your health care costs.