Copays are a fixed out-of-pocket amount paid for covered services. Insurance providers often charge copays for services such as doctor visits or prescription drugs. Your deductible is the amount you pay out of pocket for health care services covered under your insurance plan before your plan begins to pay for eligible expenses. The amount you pay for a health insurance deductible is determined by the type of plan you choose. Coinsurance is your share of costs for a covered health care service after the deductible is reached. It’s calculated as a percentage.