9cff82d2__Your_Indispensable_Guide_TIME__What_it_is
[Term] Co-Pay [Why it matters] Some of the most expensive health-insurance plans have very low co-pays for a variety of services, including doctor visits and even hospitalizations. Some reformers say this discourages people from making cost-effective medical choices. [What it is] 
The preset fixed amount a patient must pay at the time a medical service is rendered.
Understanding the Health-Care Debate: Your Indispensable Guide-TIME
What it is