Maximum amount on which payment is based for covered health care services. This may be called “eligible expense,” “payment allowance" or "negotiated rate." If your provider charges more than the allowed amount, you may have to pay the difference.

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.

Your share of the costs of a covered health care service, calculated as a percent (for example, 20%) of the allowed amount for the service. You pay co-insurance plus any deductibles you owe. For example, if the health insurance or plan’s allowed amount for an office visit is $100 and you’ve met your deductible, your co-insurance payment of 20% would be $20. The health insurance or plan pays the rest of the allowed amount.

A fixed amount (for example, $15) you pay for a covered health care service, usually when you receive the service. The amount can vary by the type of covered health care service.

The amount you owe for health care services your health insurance or plan covers before your health insurance or plan begins to pay. For example, if your deductible is $1000, your plan won’t pay anything until you’ve met your $1000 deductible for covered health care services subject to the deductible. The deductible may not apply to all services.

Emergency services you get in an emergency room.

Care in a hospital that usually doesn’t require an overnight stay.

The facilities, providers and suppliers your health insurer or plan has contracted with to provide health care services.

The most you pay during a policy period (usually a year) before your health insurance or plan begins to pay 100% of the allowed amount. This limit never includes your premium, balance-billed charges or health care your health insurance or plan doesn’t cover. Some health insurance or plans don’t count all of your co-payments, deductibles, co-insurance payments, out-of-network payments or other expenses toward this limit.

A decision by your health insurer or plan that a health care service, treatment plan, prescription drug or durable medical equipment is medically necessary. Sometimes called prior authorization, prior approval or precertification. Your health insurance or plan may require preauthorization for certain services before you receive them, except in an emergency. Preauthorization isn’t a promise your health insurance or plan will cover the cost.

A provider who has a contract with your health insurer or plan to provide services to you at a discount. Check your policy to see if you can see all preferred providers or if your health insurance or plan has a “tiered” network and you must pay extra to see some providers. Your health insurance or plan may have preferred providers who are also “participating” providers. Participating providers also contract with your health insurer or plan, but the discount may not be as great, and you may have to pay more.

The amount that must be paid for your health insurance or plan. You and/or your employer usually pay it monthly, quarterly or yearly.

A physician (M.D. – Medical Doctor or D.O. – Doctor of Osteopathic Medicine), nurse practitioner, clinical nurse specialist or physician assistant, as allowed under state law, who provides, coordinates or helps a patient access a range of health care services.

Health care services that help a person keep, get back or improve skills and functioning for daily living that have been lost or impaired because a person was sick, hurt or disabled. These services may include physical and occupational therapy, speech-language pathology and psychiatric rehabilitation services in a variety of inpatient and/or outpatient settings.

A physician specialist focuses on a specific area of medicine or a group of patients to diagnose, manage, prevent or treat certain types of symptoms and conditions. A non-physician specialist is a provider who has more training in a specific area of health care.

Care for an illness, injury or condition serious enough that a reasonable person would seek care right away, but not so severe as to require emergency room care.