9cff82d2__Your_Indispensable_Guide_TIME__What_it_is
[Term] Co-Insurance [Why it matters] This coverage is often cheaper, but costs can quickly spiral out of control if a patient needs expensive surgery. [What it is] 
Insurance that covers a preset percentage of a patient's medical care. For example, a health-care plan that covers 80% of the charge for hospitalization, leaving the patient responsible for the remaining 20%.
Understanding the Health-Care Debate: Your Indispensable Guide-TIME
What it is