No. Health insurance plans set different copay amounts for different types of services, such as an emergency room visit vs. an office visit. For prescription drugs, most plans define different copayments for different categories (formulary tiers) of drugs. For example, a plan might have a $10 copay for a generic drug, $25 for a preferred brand-name drug, $50 for a non-preferred brand-name drug, and $100 for a specialty drug. Plans may also require a mixture of copayments and coinsurance. For example, you may have a copayment for prescription drugs, but coinsurance for a hospital stay. And, insurance plans sometime “stack” copayments and coinsurance. For example, you might pay a baseline copayment of $100 for a hospital stay plus 20 percent of charges for healthcare services you receive during your stay.