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Medicare

What is the Difference Between Coinsurance and Copay? 

The Baldwin Group
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Updated: September 29, 2025
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3 minute read

No matter what insurance plan you have, it’s important to understand exactly what you’re responsible for when it comes to costs. Although they aren’t necessarily related, coinsurance and copays can cause some confusion. So, what is coinsurance? What is the difference between coinsurance and copay? Here’s what you need to know. 

Coinsurance refers to the percentage you pay for certain health care expenses during a year. After you reach the amount of your deductible, coinsurance will then take over. For example, if you have an “80/20” split with your insurance plan, the insurance company will pay 80 percent of certain health care services while you pay 20 percent. 

It’s important to remember that coinsurance will only pay for covered medical services and health care costs. If you’re in an emergency, you should, of course, always take care of yourself first. But, if you’re considering a procedure in the future, make sure to check with your plan provider to see possible costs. Find out what your coinsurance cost will be, if your deductible has been met, and any other out-of-pocket costs you’ll incur. 

Copay refers to flat fees you’ll pay for medical services or products. They usually apply to certain prescriptions drugs, doctor visits, urgent care visits, and other services. Review your insurance plan to see when copays apply. 

It should be noted that copays aren’t affected by your monthly premiums or deductibles. However, they could change based on your annual out-of-pocket costs. Not sure what those limits are or what costs are applied to the total? Check with your insurance provider to get a better idea of where you stand. 

Does my deductible affect how much I pay out of pocket? 

As we mentioned above, out-of-pocket costs for coinsurance depend a lot on your health insurance plan deductible. A deductible is an amount you pay before your insurance begins to kick in. If your annual deductible is a certain amount, you will pay that amount of money out of pocket for certain medical bills before the health insurance companies start paying. 

In many health insurance plans, your insurer pays all costs of health care after you’ve paid a certain amount of money for that year. When it comes to certain parts of Medicare, however, there are no out-of-pocket maximums. There are no limits for Original Medicare, which includes Parts A and B. 

There is a maximum out-of-pocket cost when it comes to Medicare Advantage plans, however. Medicare sets a threshold for maximum out-of-pocket limits. When you reach those limits, Advantage plans pay for everything after that (if it is covered). However, every Medicare Advantage plan can set lower limits. 

Medicare Supplemental coverage is an alternative form of coverage that is available to go along with Original Medicare. These plans could cover medical costs, including deductibles, coinsurance, and copays. Although Medicare Supplemental coverage is standardized throughout the country, Wisconsin, Massachusetts, and Minnesota have slight variations. 

There are a lot of moving pieces when it comes to healthcare insurance, cost-sharing, deductibles, copays, and coinsurance. When you receive insurance through an employer, many of the decisions are already made for you. With Medicare, there seems to be no shortage of options. But you don’t have to go it alone. 

We understand how stressful it can be to find the right plan, especially as changes happen seemingly every year. At The Baldwin Group, we pride ourselves on being an unbiased source of information, and take the time to learn what you need from your Medicare plan. 

Our insurance specialists are here to answer your questions, from explaining exactly what your copay will be to how much your coinsurance covers. We’ll be able to tell you when enrollment dates are, how to change your plans, and what primary care physicians or doctor offices accept your insurance. 

Reach out to The Baldwin Group to see how we can help you. 

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