Health insurance is a contract between you and an insurance company that helps pay for covered health care services.
In exchange for coverage, you generally pay a monthly premium. When you receive covered medical care, you may also have to pay other costs such as a deductible, copayment, or coinsurance.
The insurance company then pays its share of covered expenses according to the rules of your health plan.
In simple terms:You pay for health coverage → you receive covered medical care → you and your insurance company share eligible costs according to your plan.
Health insurance is designed to provide financial protection against potentially high medical expenses. Marketplace plans also provide important protections, including coverage of essential health benefits and protection for people with pre-existing conditions.
How Does Health Insurance Work?
Understanding four basic concepts makes health insurance much easier to understand:
Premium: The amount you pay for your health insurance every month.
Deductible: The amount you generally pay for certain covered services before your plan begins paying its share.
Copayment: A fixed amount you pay for a covered service.
Coinsurance: A percentage of the cost of a covered service that you pay after meeting applicable plan requirements.
There is also an out-of-pocket maximum, which limits how much you pay for covered in-network care during a plan year under plans that have such a limit.
For example, imagine a hypothetical plan with:
$300 monthly premium
$2,000 deductible
$30 primary-care copay
20% coinsurance
$6,000 out-of-pocket maximum
Your actual costs would depend on the services you use and the specific rules of the plan.
The important point is that your monthly premium is not necessarily your total health care cost. You should consider both the premium and what you could pay when you actually receive care. HealthCare.gov specifically recommends comparing estimated total yearly costs rather than looking only at the monthly premium.
What Is a Health Insurance Premium?
A premium is the amount you pay for your health insurance coverage, usually every month.
You generally have to pay your premium whether or not you visit a doctor during that month.
For example, if your monthly premium is $350, you would generally pay $350 each month to maintain the coverage, subject to the terms of your plan.
For Marketplace coverage, the premium you see may be reduced if you qualify for financial assistance. HealthCare.gov explains that eligible consumers may qualify for a premium tax credit, which can lower their monthly premium.
Premiums Are Not the Same as Medical Costs
One common beginner mistake is assuming that paying a monthly premium means all medical care is free. It does not.
Depending on your plan, you may still have to pay:
Deductibles
Copayments
Coinsurance
Costs for services the plan does not cover
Certain out-of-network expenses
That's why it is important to look at the complete cost structure before choosing a plan.
What Is a Health Insurance Deductible?
A deductible is the amount you generally pay for certain covered health care services before your insurance plan begins paying its share.
For example, if your deductible is $2,000, you may have to pay $2,000 toward applicable covered services before the plan starts sharing costs according to its rules.
However, a deductible does not necessarily apply to every service. Certain preventive services may be covered before you meet the deductible, depending on the plan and applicable requirements.
Some plans can also have separate deductibles for certain services, such as prescription drugs.
What Is a Copayment?
A copayment, commonly called a copay, is a fixed amount you pay for a covered health care service.
For example, a plan might require a $30 copay for a particular doctor's visit.
The exact copay depends on your plan and the type of service you receive.
Some plans use different copays for:
Primary care
Specialist visits
Urgent care
Prescription drugs
Emergency services
A copay is different from coinsurance because a copay is generally a fixed amount, while coinsurance is generally a percentage of the allowed cost.
What Is Coinsurance?
Coinsurance is the percentage of the cost of a covered health care service that you pay after applicable deductible requirements are satisfied.
For example, suppose your plan has 20% coinsurance for a covered service and the allowed cost is $500.
Your share would be:
$500 × 20% = $100
The insurance plan would generally pay the remaining $400, subject to the plan's rules.
Coinsurance can become especially important when you receive expensive medical services because even a relatively small percentage can represent a significant dollar amount.
What Is an Out-of-Pocket Maximum?
The out-of-pocket maximum is an important protection in many health insurance plans.
For a Marketplace plan, it is the most you generally have to pay during the plan year for covered services before the plan pays 100% of covered benefits for the remainder of the coverage period, subject to the plan's rules.
The limit generally applies to amounts such as deductibles, copayments, and coinsurance for covered in-network care.
It generally does not include your monthly premiums, services your plan does not cover, or certain out-of-network expenses.
For 2026 Marketplace plans, the out-of-pocket limit cannot be more than:
$10,600 for an individual
$21,200 for a family
Individual plans can have lower limits than the federal maximum.
This is one reason you should look at the out-of-pocket maximum when comparing health plans—not just the monthly premium.
What Does Health Insurance Cover?
Coverage depends on the specific plan.
Marketplace plans must cover 10 essential health benefit categories, including services such as:
Doctor and outpatient services
Emergency services
Hospitalization
Pregnancy, maternity, and newborn care
Mental health and substance use disorder services
Prescription drugs
Rehabilitative and habilitative services
Laboratory services
Preventive and wellness services
Pediatric services
HealthCare.gov notes that Marketplace plans include these essential health benefits, although the specific details and costs can vary by plan.
You should always check the individual plan's benefits and coverage documents before assuming a particular treatment, medication, doctor, or facility is covered.
Are Preventive Services Covered?
Many preventive services are available at no cost when provided by an in-network provider under applicable coverage rules.
Examples can include certain:
Immunizations
Screening tests
Preventive examinations
Counseling services
HealthCare.gov states that many plans must cover certain preventive services without charging a copayment or coinsurance when applicable requirements are met. Coverage details can vary, so it is important to verify the service and provider network.
What Is the Health Insurance Marketplace?
The Health Insurance Marketplace is a service that helps eligible people compare and enroll in health insurance.
The federal Marketplace is operated through HealthCare.gov in many states, while some states operate their own Marketplace platforms.
When shopping through the Marketplace, you can compare:
Monthly premiums
Deductibles
Copayments
Coinsurance
Out-of-pocket maximums
Provider networks
Covered medications
Benefits
Plan categories
Depending on your circumstances and eligibility, you may also qualify for financial assistance.
What Are Bronze, Silver, Gold, and Platinum Plans?
Marketplace plans are grouped into four common metal categories:
Bronze
Silver
Gold
Platinum
These categories primarily describe how you and the insurance plan share the cost of covered care. They do not represent the quality of medical care.
Generally, Bronze plans have lower premiums and higher costs when you receive care, while Platinum plans generally have higher premiums and lower costs when you receive covered care.
Your actual premium and out-of-pocket costs depend on the plan, location, household circumstances, eligibility for savings, and other factors.
HMO vs. PPO: What's the Difference?
Health insurance plans can use different provider-network structures.
Two common types are HMO and PPO plans.
HMO
A Health Maintenance Organization, or HMO, generally focuses on care from doctors and other providers within its network. Except in emergencies, out-of-network care may not be covered.
PPO
A Preferred Provider Organization, or PPO, generally gives you more flexibility to use providers outside the network, although you usually pay more for out-of-network care.
The exact rules vary by plan.
HealthCare.gov also identifies other plan types, including EPO and POS plans.
What Is a Health Insurance Network?
A provider network is a group of doctors, hospitals, pharmacies, and other health care providers that have contracted with an insurance plan.
Using an in-network provider can often reduce your costs.
Before choosing a health insurance plan, check whether your:
Primary-care doctor
Specialists
Preferred hospital
Pharmacy
Other important providers
are included in the plan's network.
This can be particularly important if you already have an established doctor or regularly receive specialist care.
How Do You Choose a Health Insurance Plan?
Choosing health insurance is not simply about finding the lowest monthly premium.
Consider the following:
1. Compare Monthly Premiums
Check how much you will pay every month.
But don't stop there.
2. Check the Deductible
A lower premium can sometimes come with a higher deductible.
Think about how much you could comfortably pay if you need significant medical care.
3. Look at the Out-of-Pocket Maximum
This can help you understand your potential maximum exposure for covered in-network services during the plan year.
4. Check Your Doctors
Make sure your preferred doctors and hospitals are included in the plan's network if that matters to you.
5. Check Prescription Coverage
If you take regular medications, check whether they are covered and what your expected cost may be.
6. Consider Your Expected Health Care Needs
Someone who rarely uses health care may have different priorities from someone who regularly sees specialists or needs ongoing treatment.
7. Compare the Total Estimated Cost
HealthCare.gov recommends looking beyond the monthly premium and comparing estimated yearly costs, including deductibles, copayments, coinsurance, and other expenses.
How Can You Get Health Insurance in the USA?
There are several ways people may obtain health coverage, depending on their circumstances.
Common sources include:
Employer-sponsored health insurance
Health Insurance Marketplace plans
Medicaid
CHIP
Medicare
Other qualifying coverage options
Eligibility and enrollment rules vary.
For Marketplace coverage, you can check available plans and potential savings through HealthCare.gov or your state's Marketplace, depending on where you live.
Can You Get Financial Help With Health Insurance?
Some people who enroll in Marketplace coverage may qualify for financial assistance based on factors such as household income and other eligibility requirements.
Potential assistance can include a premium tax credit, which can reduce the monthly premium.
Some eligible consumers may also qualify for additional savings that reduce certain out-of-pocket costs.
Because eligibility can change, it is best to use the current Marketplace application or official eligibility information rather than relying on an old income threshold or outdated article.
When Can You Enroll in Health Insurance?
Enrollment opportunities depend on the type of coverage.
For Marketplace coverage, there is an annual Open Enrollment Period, while certain life events may qualify someone for a Special Enrollment Period.
Examples of qualifying life events can include losing other health coverage, moving, getting married, or having a baby, depending on the applicable rules.
Medicaid and CHIP have different enrollment rules and may allow enrollment throughout the year for people who qualify.
Always check the current official enrollment dates and eligibility rules before applying.
What Happens If You Don't Have Health Insurance?
Without health insurance, you may be responsible for the full cost of medical services you receive.
Even a routine medical issue can become expensive if it requires:
Emergency treatment
Hospitalization
Surgery
Specialist care
Diagnostic testing
Long-term medication
Health insurance can therefore provide financial protection against unexpected covered medical expenses.
However, insurance does not mean that every medical expense is automatically covered. You should understand your plan's exclusions, network rules, cost-sharing requirements, and coverage limitations.
Common Health Insurance Mistakes to Avoid
Choosing a Plan Based Only on Premium
The cheapest monthly premium isn't necessarily the cheapest plan overall.
Always compare estimated total costs.
Ignoring the Provider Network
A plan may look attractive until you discover your preferred doctor or hospital is out of network.
Not Checking Prescription Coverage
If you regularly take medication, check the plan's drug coverage before enrolling.
Confusing Deductibles With Out-of-Pocket Maximums
They are not the same thing.
Your deductible is one part of your cost-sharing structure. Your out-of-pocket maximum is a broader limit on certain covered in-network expenses.
Assuming Every Service Is Free
Even with health insurance, you may have to pay deductibles, copays, or coinsurance.
Using Outdated Information
Health insurance rules, costs, enrollment periods, and eligibility requirements can change.
For current Marketplace information, use official government resources such as HealthCare.gov.
Frequently Asked Questions
Is health insurance worth having?
Health insurance can provide financial protection against high costs for covered medical care. Whether a particular plan is appropriate depends on your health needs, finances, eligibility, and the plan's benefits and costs.
How much does health insurance cost in the USA?
There is no single price for health insurance in the United States. Premiums and out-of-pocket costs can vary based on factors including location, age, household circumstances, plan selection, and eligibility for financial assistance.
What is the difference between a premium and a deductible?
A premium is what you pay for coverage, usually every month. A deductible is what you generally pay for certain covered services before the plan starts paying its share.
What is the difference between copay and coinsurance?
A copay is generally a fixed dollar amount for a covered service. Coinsurance is generally a percentage of the allowed cost of a covered service.
What is an out-of-pocket maximum?
It is a limit on what you pay during a plan year for covered services under the plan's applicable rules. For Marketplace plans, after you reach the applicable out-of-pocket limit for covered in-network services, the plan generally pays 100% of covered benefits for the rest of the coverage period.
Does health insurance cover pre-existing conditions?
Marketplace plans must cover pre-existing conditions and cannot reject you or charge you more because of a pre-existing condition.
Are preventive services free with health insurance?
Many applicable preventive services are covered without cost-sharing when provided in-network, although coverage requirements and circumstances matter. Always check the specific service and plan.
Can I get health insurance if I am unemployed?
Possibly. Depending on your circumstances, you may be able to obtain Marketplace coverage or qualify for Medicaid or other coverage options.
Can I change my health insurance plan?
It depends on the type of coverage and whether you are within an applicable enrollment period or qualify for a Special Enrollment Period.
Final Thoughts
Health insurance can seem complicated at first, but understanding the basic terms makes it much easier to compare plans.
Start with the fundamentals:
Premium + Deductible + Copay/Coinsurance + Out-of-Pocket Maximum + Network + Coverage
Don't choose a plan based only on its monthly premium. Consider your expected health care needs, preferred doctors and hospitals, prescription medications, deductible, out-of-pocket maximum, and estimated total yearly costs.
For Marketplace coverage, use official resources to check current plans, prices, eligibility, savings, and enrollment information because these details can change.
