The copay is a fixed amount you pay for a health service, such as a doctor's appointment or a prescription.
The amount of the copay depends on your health plan. The copay for each service may be different. For example, a doctor's visit may have a $10 copay. But a visit to a specialist, like a psychiatrist, may have a $15 copay.
You usually have to pay the copay when you get a health care service, such as at your doctor's office or at the drug store.
Under the Affordable Care Act, you won't have to pay a copay for certain preventative services, like cancer screenings or vaccines, as long as your health plan isn’t grandfathered.