A Medicare copay, in one sentence: it's a fixed dollar amount you pay for a service — like $30 for a doctor visit — that stays the same no matter what the visit actually costs, and it's just one of five pieces of your Medicare costs, along with your premium, deductible, coinsurance, and out-of-pocket maximum.
New to this? Start with What Is Medicare?
What Is a Medicare Copay? The Quick Answer
A copay (short for copayment) is a set dollar amount you pay each time you get a specific service. The amount stays the same no matter what the service actually costs. Your plan pays the rest, as long as the provider is in your plan's network.
Whether you'll see a copay at all depends on which coverage you have:
- Original Medicare (Parts A and B) mostly does not use flat copays. Part B typically charges 20% coinsurance instead, after the yearly deductible.
- Medicare Advantage (Part C) plans commonly do use copays — a set dollar amount per doctor visit, specialist visit, or hospital day, set by the plan.
- Part D drug plans use copays or coinsurance per prescription, depending on the drug's tier.
People often mix up copays with coinsurance. The difference is simple:
- A copay is a flat amount: $30 for a visit, $5 for a generic drug.
- Coinsurance is a percentage of the bill: you pay 20%, the plan pays 80%.
One common surprise: Medicare's yearly Wellness visit is free, but a routine physical isn't covered, so a "free checkup" can still produce a bill. See Wellness visit vs. annual physical.
Where Medicare copays show up, part by part
Whether you pay a copay or coinsurance depends on which part of Medicare, or which plan, you have:
| Coverage | Copay or coinsurance? | What to expect |
|---|---|---|
| Part A (hospital) | Deductible, then coinsurance | Most people pay no premium. You pay a deductible per benefit period, then daily coinsurance for long hospital or skilled nursing stays. |
| Part B (doctors, outpatient) | Mostly coinsurance, not a flat copay | After the yearly deductible, you typically pay 20% of the Medicare-approved amount for most services. |
| Part C (Medicare Advantage) | Copays and coinsurance | Private plans set their own copays for doctor visits, specialists, and hospital days. Each plan's amounts differ, and all plans have a yearly out-of-pocket limit. |
| Part D (prescription drugs) | Copay or coinsurance per prescription | After any deductible, you pay a copay or a percentage for each drug. Amounts depend on the drug's tier on your plan's list. |
| Medicaid | Little or none | Some states charge small copays for certain services. Cost-sharing is far lower than Medicare or private insurance. |
How to find your copay
- Original Medicare: there is no copay schedule to look up. Plan on 20% coinsurance for most Part B services after the deductible, and check Medicare.gov for this year's Part A and Part B deductibles.
- Medicare Advantage or Part D: your copays are listed in your plan's documents and on your insurer's website. You can also call the member services number on your card. When comparing plans each fall, Medicare.gov's Plan Finder shows each plan's copays side by side.
- On a bill: the copay is usually a separate line, labeled "copay" or "copayment," next to what the plan paid.
Help paying Medicare copays
If your income is limited, you may not have to pay copays at all. A Medicare Savings Program can pay your Medicare cost-sharing, Extra Help lowers Part D drug copays, and people with both Medicare and Medicaid usually pay little or nothing. Income limits are higher than many people expect. See Getting Help Paying to check what you qualify for.
The rest of this page explains all five cost types and how they add up over a year.
The Five Main Cost Categories
Premium
Your premium is what you pay each month (or sometimes each year) to have health coverage. You owe it whether or not you use any healthcare. Think of it like a membership fee: without it, you have no insurance.
Deductible
The deductible is the amount you must pay out of your own pocket before your plan starts paying its share. Once you've paid your deductible, your plan kicks in to help with the remaining costs.
Example: Suppose your deductible is $1,000 and you visit the doctor. If the visit costs $150, you pay all of it. If you have three more visits totaling $900, you pay all of those too—now you've paid $1,050 total, which meets your $1,000 deductible. On your next claim, the plan starts sharing the cost with you.
Copay
A copay (or copayment) is a fixed amount you pay for a specific service. It's the same every time, regardless of what the actual service costs.
Example: Your plan might charge a $30 copay for a primary-care doctor visit, a $50 copay for a specialist visit, and a $5 copay for a generic prescription. You pay exactly that amount; your plan pays the rest of the bill (assuming the provider is in-network).
Coinsurance
Coinsurance is a percentage of the cost that you and your plan split. Your plan documents will specify your share (commonly 10%, 20%, or 30%), and the plan covers the rest.
Example: Your plan has 20% coinsurance for outpatient surgery. Suppose the surgery is billed at $5,000. Once your deductible is met, you pay 20% of that ($1,000), and your plan pays 80% ($4,000).
Out-of-Pocket Maximum
Your out-of-pocket maximum (or out-of-pocket limit) is an annual cap on how much you'll spend on your own. Once you hit this limit, your plan pays 100% of all covered services for the rest of that calendar year.
Example: Your out-of-pocket maximum is $5,000. Over the course of a year, between deductibles, copays, and coinsurance, you've paid $5,000. Any medical bills after that point are covered entirely by your plan—you pay $0.
How They Work Together Over a Year
January–March: You pay your $200 premiums. You see your primary doctor ($30 copay), get a lab test billed at $300 (you pay all of it toward your deductible), and see a specialist whose bill is $1,500 (you pay 20%, which is $300, also counting toward your deductible). So far, you've paid $630 out of pocket; your $1,500 deductible is now met.
April–August: You have more specialist visits. Each time, your plan covers 80% and you pay 20% coinsurance. Over these months, you pay $3,000 in coinsurance. Your total out-of-pocket spending is now $630 + $3,000 = $3,630.
September: You need emergency surgery billed at $6,000. At 20% coinsurance, you'd owe $1,200. But $1,200 + $3,630 = $4,830, which is still under your $7,500 out-of-pocket maximum. You pay the $1,200.
October–December: You have a hospitalization. The bill is $8,000, and your share would be $1,600. But $1,200 + $1,600 = $2,800, which exceeds your $7,500 out-of-pocket max by $1,300. So you pay only $1,300 (bringing your total to $7,500). Your plan pays the remaining $6,700. For the rest of the year, you pay $0 out of pocket.
Medicare-Specific Costs
Part A and Part B
Medicare has separate costs for different types of coverage:
- Part A (Hospital Insurance) covers hospital stays, skilled nursing, hospice, and some home care. Most people don't pay a premium, but they face a deductible and coinsurance for hospital stays and extended stays in a skilled nursing facility.
- Part B (Medical Insurance) covers doctor visits, outpatient services, and lab work. It has a monthly premium and an annual deductible, then you typically pay 20% coinsurance for most services.
Part B Premium and IRMAA
Your Part B premium is based on your income. Higher earners pay more through a surcharge called IRMAA (Income-Related Monthly Adjustment Amount). The income thresholds and surcharge amounts are set annually by CMS. Two details trip people up:
- It's based on your income from two years ago. Social Security uses the income on your tax return from two years back. If you file jointly, your combined income as a couple is what counts — and the surcharge is added to each spouse's own premium.
- You can appeal it after a life change. If your income has dropped since that tax return — because you retired, reduced your hours, married, divorced, or lost a spouse — ask Social Security to use your new, lower income instead. File form SSA-44 or call 1-800-772-1213. Many new retirees pay the surcharge for a year or two without knowing they can have it recalculated. Full guide: Appealing IRMAA with Form SSA-44, step by step.
For current Part B premiums and IRMAA thresholds, visit Medicare.gov. Couples: see Planning for Two for how this works across a household. Heading into Open Enrollment: see What's Changing in Medicare Costs for 2027 for what's confirmed so far. If your Part B premium comes out of your Social Security check, see the hold harmless rule.
Part C (Medicare Advantage)
Medicare Advantage plans are offered by private insurers under contract with Medicare. They usually have lower or zero premiums than Original Medicare but use copays and coinsurance. Each plan's costs vary.
Part D (Prescription Drug Coverage)
Part D has four distinct cost phases:
- Deductible phase: You pay the full cost of prescriptions until you reach your plan's deductible.
- Initial coverage phase: After your deductible, you pay a copay or coinsurance; your plan covers the rest.
- Coverage gap (the "donut hole"): Once your total drug costs reach a certain amount, you enter the donut hole. You pay a higher percentage of your drug costs, though catastrophic coverage limits your out-of-pocket spending.
- Catastrophic coverage phase: Once your out-of-pocket costs hit the annual limit, you pay a small copay or coinsurance, and your plan covers the rest.
Part D rules change from year to year. For current phases and thresholds, see Medicare.gov.
ACA Marketplace Subsidies
If you enroll in a health plan through the ACA Marketplace (also called the Health Insurance Marketplace), you may qualify for financial help based on your income:
- Premium Tax Credits reduce your monthly premium. The insurer receives the credit and lowers what you pay each month.
- Cost-Sharing Reductions (CSRs) lower your deductible, copays, and coinsurance if you choose a Silver-level plan and qualify based on income.
These subsidies are income-based and change annually. Your actual payment depends on your household income relative to the federal poverty level. For current income limits and to estimate your subsidy, visit HealthCare.gov.
Medicaid
Medicaid is a joint state–federal program with widely varying benefits and costs by state. Generally, Medicaid has little or no premium, deductible, or copay for eligible members. Some states charge small copays for certain services, but cost-sharing is typically much lower than private insurance or Medicare.
To learn what Medicaid costs in your state, visit your state's Medicaid website through Medicaid.gov.
Cost Terms at a Glance
| Term | What It Means | When You Pay It |
|---|---|---|
| Premium | Monthly (or annual) membership fee for coverage | Every month, regardless of whether you use care |
| Deductible | Amount you must pay before your plan helps | Before the plan starts sharing costs; resets each year |
| Copay | Fixed amount for a specific service | At the time you get the service (or after deductible, depending on plan) |
| Coinsurance | Your percentage share of the cost | After deductible is met; you and plan split the bill |
| Out-of-Pocket Maximum | Annual cap on your total out-of-pocket costs | When reached, plan pays 100% for rest of year |
| IRMAA | Medicare income-related surcharge on Part B | Added to your Part B premium if income exceeds threshold |
| Premium Tax Credit | Marketplace subsidy that reduces your premium | Paid directly to your insurer; lowers your monthly bill |
| Cost-Sharing Reduction | Marketplace subsidy that lowers deductibles and copays | Lowers what you owe when you get care |
Key Takeaways
- Your premium is what you pay to have coverage; other costs apply when you use care.
- Your deductible is what you pay first; once it's met, your plan begins to share costs.
- Your out-of-pocket maximum sets an annual limit on your spending; the plan covers 100% after you hit it.
- Different programs—Original Medicare, Medicare Advantage, Marketplace plans, and Medicaid—have different cost structures.
- Income-based help is available for Medicare (IRMAA adjustments) and Marketplace plans (tax credits and cost-sharing reductions).