The fixed amount that you pay for each provider visit or prescription. The fixed amount can vary depending on the type of provider or prescription, but does not vary based on the services provided at a visit. HMO(HMO) A form of healthcare network, usually with fairly tight restrictions on which medical providers you can see and usually requiring you to see your primary care physician before you see a special... More plans are usually the only type of plans that have co-paysThe fixed amount that you pay for each provider visit or prescription. The fixed amount can vary depending on the type of provider or prescription, but does not vary based on the services provided at ... More on doctor visits, while many plans use co-paysThe fixed amount that you pay for each provider visit or prescription. The fixed amount can vary depending on the type of provider or prescription, but does not vary based on the services provided at ... More for prescriptions.