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Balance billing When a provider bills you for the difference between the provider's charge and the allowed amount. For example, if the provider's charge is $100 and the allowed amount is $70, the provider may bill you for the remaining $30. A preferred provider may not balance bill you for covered services.
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Co-insurance Your part of the costs of a health service that is covered by insurance. It is calculated as a percentage and you pay it in addition to whatever deductible you may owe. For example if your plan allows $100 for a doctor visit and you've already met your deductible, your co-insurance payment of 20% would be $20. The insurance plan picks up the rest of the cost.
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Donut Hole, Medicare prescription drug Most plans with Medicare prescription drug coverage (Part D) have a coverage gap (called a "donut hole"). This means that after you and your drug plan have spent a certain amount of money for covered drugs, you have to pay all costs out-of-pocket for your prescriptions up to a yearly limit. Once you have spent up to the yearly limit, your coverage gap ends and your drug plan helps pay for covered drugs again.
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Essential health benefits This is the set of health care services that must be covered by certain plans starting in 2014. There are 10 categories in which insurance plans must provide services and items: Maternity and newborn care, prescription drugs, rehabilitative services and devices, lab services, ambulatory patient services, emergency services, hospitalization, wellness and preventive services, chronic disease management, and pediatric services that include vision and oral care.