Deductibles, Copays, and Coinsurance Explained: What International Students Actually Pay
By Muntasir Minhaz • Published Aug 19, 2026
A deductible is what you pay before insurance starts helping. A copay is a fixed fee per visit. Coinsurance is a percentage you keep paying after the deductible, up to your plan's out-of-pocket maximum.
💵 Deductible: pay the full bill yourself until you hit this amount
📩 Copay: a flat fee like $25 per doctor visit, paid every time
🏠 Coinsurance: a percentage like 20% of the bill, after the deductible is met
🛂 Out-of-pocket maximum: the most you pay in a plan year, insurance covers 100% after that
The three terms that decide your bill
Every US health insurance plan, including university student health plans, uses some mix of deductibles, copayments, and coinsurance to split costs between you and the insurer. These are called cost-sharing terms, and understanding them tells you what a doctor visit or hospital stay actually costs before you go.
The official definitions come from the federal HealthCare.gov glossary , which every US insurer uses as the baseline for plan documents.
Deductible
Your deductible is the amount you pay yourself for covered care before your insurance starts paying its share. If your plan has a $500 deductible, you pay the first $500 of covered medical costs in full. After that, the plan starts sharing costs with you through copays or coinsurance.
Preventive care, like an annual physical or certain vaccines, is often covered at 100% even before you meet your deductible, because federal rules require most plans to cover preventive services without cost sharing. Check your plan's summary of benefits to confirm which services skip the deductible.
Copayment
A copayment, or copay, is a fixed dollar amount you pay for a specific service, regardless of the total bill. A plan might set a $25 copay for a primary care visit and a $50 copay for a specialist visit. You typically pay the copay at the time of the visit, and it does not usually change based on how expensive the appointment turns out to be.
Some plans apply copays before the deductible is met, others only after. Read your plan's benefit summary to see which applies, since this changes what you owe on your very first visit.
Coinsurance
Coinsurance is your share of the cost expressed as a percentage, and it usually kicks in only after you have met your deductible. If your plan has 20% coinsurance and you get a $1,000 covered treatment after meeting your deductible, you pay $200 and the insurer pays $800.
Coinsurance can add up fast for expensive care like surgery or a hospital stay, which is why the out-of-pocket maximum matters so much.
Out-of-pocket maximum
This is the ceiling on what you pay in a plan year for covered, in-network care. Once your combined deductible, copays, and coinsurance hit this number, your insurance pays 100% of covered costs for the rest of the plan year. Every ACA-compliant plan is required to have one, so check your plan documents for the exact figure, since it varies by plan and by insurer.
A worked example
Say your plan has a $500 deductible, 20% coinsurance, and a $25 copay for primary care visits.
| Situation | What you pay |
|---|---|
| Routine doctor visit, deductible not yet met, plan requires flat copay for this visit type | $25 copay only |
| Lab test costing $300, deductible not yet met, no copay category for labs | $300 (full cost, applied to deductible) |
| Hospital stay costing $5,000, deductible already met earlier in the year | 20% coinsurance = $1,000 (unless this exceeds your out-of-pocket maximum) |
These are illustrative numbers only. Your actual deductible, copay, and coinsurance amounts are set by your specific plan, whether that is your university's student health plan or a private plan you enrolled in. Look up the exact figures in your plan's summary of benefits and coverage, a standardized document every US insurer must provide under rules from the Centers for Medicare and Medicaid Services .
Premiums are separate from all of this
Your premium is the amount you or your school pays to keep the plan active, usually billed per semester or per year for a student plan. Premiums are separate from deductibles, copays, and coinsurance. You pay the premium whether or not you use any care that year, while deductibles, copays, and coinsurance only apply when you actually receive treatment. A plan with a lower premium often has a higher deductible or coinsurance, and a plan with a higher premium often has lower cost sharing when you get sick, so weigh both sides rather than judging a plan on premium price alone.
How costs add up over a full year
These terms interact across the whole plan year, not just per visit. Every dollar you pay toward your deductible, copays, and coinsurance counts toward your out-of-pocket maximum. Once a student hits that maximum, typically after a major event like surgery or a hospital stay, every other covered visit for the rest of the plan year is free. This is why one expensive early-year claim can actually reduce what you owe for care later in the same year.
Reading your insurance card
Your insurance card usually lists your copay amounts for common visit types directly on the front, such as "PCP $25" for a primary care copay and "Specialist $50." It also lists a member ID number and a customer service phone number. Your deductible, coinsurance percentage, and out-of-pocket maximum are not usually printed on the card itself, so keep your plan's summary of benefits and coverage document saved somewhere easy to find, such as a photo on your phone.
Where to check the numbers on your own plan
Ask your international student office for your university plan's summary of benefits and coverage document.
Log into your insurer's member portal, which usually lists your deductible, copay amounts, and how much of your deductible you have already met this year.
If a term on your plan documents is unclear, the HealthCare.gov glossary and the National Association of Insurance Commissioners consumer resources define every standard insurance term in plain language.