Copayment

A copayment is a set dollar amount an insured person owes for a particular covered service, fixed by the plan rather than calculated from what the service costs. HealthCare.gov defines it as "a fixed amount ($20, for example) you pay for a covered health care service after you've paid your deductible," and notes in the same entry that copayments "can vary for different services within the same plan, like drugs, lab tests, and visits to specialists."

The official word is copayment and the everyday word is copay. HealthCare.gov titles its glossary entry "Copayment" and treats "copay" as a shortening rather than a separate thing, which is worth knowing only because plan documents and insurance-card printing tend to use the long form while everyone speaking uses the short one. They are the same charge.

Fixed versus proportional is the distinction that does all the work. A copayment is a number the plan chose; coinsurance is a percentage of what the plan has agreed the service costs. On a $60 office visit and a $6,000 procedure, a 20% coinsurance produces two very different bills while a $30 copayment produces the same bill twice. That asymmetry explains the design: plans tend to attach copayments to services whose price they can predict and want you to use, and coinsurance to services whose price they cannot.

A single plan carries a schedule of copayments, not one figure. The summary of benefits typically lists separate amounts for primary care, for a specialist, for urgent care, for the emergency department, for imaging and for each prescription drug tier. The specialist amount is usually a multiple of the primary care amount, and the emergency department amount is usually the largest, sometimes waived if the visit results in an admission. None of that is set by federal law; it is the plan's own benefit design, which is why the only reliable source for your own numbers is your plan's summary of benefits and coverage.

🔑 When the copayment starts applying is plan-specific, and this is where people are surprised. HealthCare.gov's own illustration runs both ways: on a visit with a $100 allowed amount and a $20 copayment, you pay $20 if the deductible has been met and the full $100 if it has not. But plans commonly put named services ahead of the deductible, so that an office visit or a generic prescription costs the copayment from the first day of the plan year even though the deductible is untouched. Every Marketplace plan must additionally cover certain preventive services with no cost sharing at all, which is a statutory requirement rather than a plan feature. So the familiar shorthand that your share begins only once the deductible is met is reliable for coinsurance and only sometimes true for copayments.

Copayments count toward the ceiling; premiums never do. Every copayment you pay on covered in-network care adds to the running total that ends at the out-of-pocket maximum, alongside the deductible and any coinsurance. Once that ceiling is reached the plan pays the whole of the covered in-network bill and the copayments stop. The premium sits entirely outside that count, which is why comparing two plans on their copayment schedule alone compares the middle of the range and not either end of it.

A copayment is charged per service, so one appointment can generate several. A specialist visit that includes a procedure and a laboratory test can produce a copayment for each, depending on how the plan classifies them. The same logic runs the other way in a hospital outpatient department, where Medicare enrollees face a facility copayment in addition to what they owe for the physician's work. The general point is that the copayment attaches to the billed service rather than to the appointment, and the number of services is not something a patient controls or usually knows in advance.

1. The plan sets an amount in advance for each category of covered service, and prints the common ones on the insurance card and in the summary of benefits.

2. You receive a covered service, and the plan applies its own rules for whether the copayment applies now or only after the deductible is met.

3. You pay the fixed amount, usually at the time of service, and the plan pays the rest of the allowed amount for that service.

4. The amount counts toward your out-of-pocket maximum for the plan year.

5. Copayments stop once you reach that maximum, and the plan pays the whole covered in-network bill for the rest of the year.

A hypothetical, showing that the copayment printed on the card is only half the answer. Two plans both print a $40 specialist copayment. Under the first plan, specialist visits are one of the services paid ahead of the deductible, so a visit in January costs $40. Under the second, copayments apply only once the deductible has been satisfied, so the identical visit in January costs the plan's full allowed amount for it, say $190, and only falls to $40 later in the year. That is a difference of $150 on the same visit, with the same number on the card, and nothing about the card reveals it. Under both plans the amount paid counts toward the out-of-pocket maximum. Figures are illustrative; the mechanism is not.

Now change the service rather than the plan. A generic prescription with a $10 copayment and a brand-name drug on a higher tier with a $75 copayment are both flat charges, so the pharmacy's own price for either is irrelevant to what you hand over. If the plan's allowed amount for the generic is $8, whether you are charged the $10 copayment or the lower allowed amount is settled by the plan's own terms rather than by any general rule, which is worth checking on any drug you take regularly.

Pros

• It is knowable in advance, which is rare in American health care. You can decide whether to go without first finding out what the visit will be billed at.
• It is capped by construction. A flat charge cannot scale with the size of the bill the way a percentage can.
• It counts toward the out-of-pocket maximum, so it contributes to the point at which cost sharing stops entirely.
• It keeps small claims cheap to administer, which is part of why plans can price routine care lower than the arithmetic of the deductible alone would suggest.

Cons

• It does not shrink for cheap care, so a flat charge can be most or all of what a low-cost visit was worth.
• It is charged per service, so a single appointment that produces several billed services can produce several copayments.
• It gives no signal about price. Two plans with identical copayments can differ enormously in what a serious year costs, because the deductible, coinsurance and out-of-pocket maximum sit behind it.
• Whether it applies before the deductible is plan-specific and easy to misread, so the same card can mean two very different January bills.
• Lower copayments are generally bought with a higher premium, and the premium is owed every month whether or not you use the coverage.