A copay is a fixed fee that you pay at the time of your appointment. Typically the amount of your copay for a specialist visit is printed on your health plan ID card.
A deductible is the amount you pay each year for most eligible services before your health plan begins to share the cost of covered service (coinsurance).
After the deductible is met, your insurance company will pay a share of eligible costs, also known as coinsurance. For example, if your coinsurance is 20 percent, you will pay 20 percent of the cost and your insurance plan will pay the other 80 percent.