Learn what is: 

- deductible 

- coinsurance 

- co-payment

What is a Co-payment?

A fixed amount (for example $20) you pay for a covered health care service after you've paid your deductible. 
Generally it s a fixed dollar amount. 

For example:
Let's say your health insurance plan's allowable cost for a doctor's office visit is $100. Your copayment for a doctor visit is $20.

If you've paid your deductible: You pay $20, usually at the time of the visit.
If you haven't met your deductible: You pay $100, the full allowable amount for the visit.

Copayments (sometimes called "copays") can vary for different services within the same plan, like drugs, lab tests, and visits to specialists.
Generally, plans with lower monthly premiums have higher copayments. Plans with higher monthly premiums usually have lower copayments.

Also, learn how deductibles and coinsurance affect your total costs of care