What health insurance terms really mean

A

Accident insurance

Supplemental insurance that pays you cash if you’re injured in a covered accident. It helps cover costs your health insurance doesn’t. Like deductibles, copays, and even everyday expenses while you recover.

Actuarial value

A percentage that shows how costs are split between you and your insurance. If a plan has a 70% actuarial value, it pays about 70% of healthcare costs on average. You cover the other 30% through deductibles, copays, and coinsurance.

Higher percentage = the plan pays more. Lower percentage = you pay more when you use care.

Advanced premium tax credit (APTC)

A government subsidy that lowers your monthly premium. You qualify for it based on your income and household size. It’s typically applied upfront — meaning you pay less each month, not later at tax time (assuming your estimated income and subsidy calculations are correct).

Affordable Care Act (ACA)

The law that set the ground rules for modern health insurance. It covers people with pre-existing conditions, requires plans to include preventive care, and shapes nearly every individual plan you see today. If you’re shopping for individual coverage, you’re likely shopping within the ACA system.

Agent

A licensed professional who helps people or businesses shop for and enroll in health insurance. They can explain options, answer questions, and help you enroll. Some work independently. Some work with insurance companies. Either way, they’re there to guide.

Allowed amount

The maximum your insurance plan will pay for a covered service. If your provider charges more than that amount and they’re out-of-network, you may have to pay the difference.

Ancillary benefits (also known as supplemental benefits)

Optional coverage that layers on top of your main health plan (like dental, vision, accident, and critical illness insurance). These plans cover specific needs your primary insurance may not fully cover.

Annual Limit

A cap on how much a plan will pay for certain services in a year. Thanks to the ACA, most essential health benefits (like hospital stays, prescriptions, and maternity care) don’t have annual limits anymore.

B

Balance Billing

When a provider bills you for the difference between what they charge and what your insurance agrees to pay. It most often happens with out-of-network providers, and it can lead to unexpected bills.

Brand-name drug

A medication sold under the name the original manufacturer gave it. Brand-name drugs usually cost more than generic versions. Even when the active ingredients are the same.

Broker

A licensed professional who helps you compare, choose, and enroll in health insurance. Brokers work for you, not for one specific insurance company.

C

COBRA

A federal program that lets you temporarily keep your employer-based health insurance after you leave the job. The catch: You pay the entire premium. That’s why it’s a short-term fix, not a permanent solution.

Cancer insurance

Supplemental coverage that pays you cash if you’re diagnosed with cancer. You can use the money for medical bills, time off work, and other treatment and recovery expenses.

Catastrophic plan

A lower-cost plan with a high deductible. These are built for worst-case scenarios. They are standardly available only to those under 30, unless you qualify for a specific hardship exemption or don’t qualify for a subsidy.

Claim

A request for your insurance company to pay part of a medical bill.

Coinsurance

The percentage of a medical bill you pay after you meet your deductible. If your coinsurance is 20%, that means you pay 20%. Your insurance covers the remaining 80%

Coordination of benefits

What happens when you have two health plans at the same time. Behind the scenes, the insurance companies sort out who pays first and who pays second. That way you don’t have to pay twice.

Copay (Copayment)

A fixed amount you pay for a service, like $30 for a doctor’s visit. Your insurance covers the rest.

Cost-sharing reduction (CSR)

A type of discount or extra savings that lowers what you pay when you use care. That includes your deductibles, copays, and coinsurance. But it’s only available if you have a Silver plan and a lower income.

Covered service

A healthcare service your plan helps pay for.

Critical illness insurance

Separate coverage that pays you cash after a serious diagnosis (like a heart attack, stroke, or cancer). You can use the money however you need. Think treatment costs or everyday expenses while you focus on recovery.

D

Deductible

The amount you have to pay out of pocket each year before your insurance kicks in. Once you hit it, you and your plan start splitting the costs.

Dental insurance

Coverage that helps pay for dental care. That includes cleanings, exams, fillings, and sometimes bigger procedures like crowns or root canals. For adults, dental insurance is usually separate from your medical plan.

Dependent

A person (like a spouse or child) who’s covered by someone else’s insurance.

E

Effective date

The date your coverage begins.

Emergency services

Medical care for a serious or life-threatening condition. Your insurance usually covers this, even if you visit an out-of-network hospital or provider.

Employer contribution

The monthly amount your employer gives you to help pay for your health coverage. For example, with an ICHRA, your employer gives you a monthly tax-free allowance to reimburse you for insurance premiums and qualified medical expenses.

Employer-sponsored insurance (ESI)

Health insurance you get through your job. Your employer usually pays some or all of the monthly premium. You pay for the rest out of your paycheck.

Essential health benefits

The core services all ACA individual health plans must cover. That includes preventive care, mental health treatment, prescriptions, maternity care, and more.

Exclusive provider organization plan (EPO)

A type of health plan requires you to stay in-network for your care, unless it’s an emergency. That means you can see specialists without referrals. Step outside the network, though, and the cost is on you.

Explanation of benefits (EOB)

The summary your insurer sends after you get care. It lays out what care you got, what your plan covered, and what you’ll have to pay. It’s not a bill. It’s just a cost breakdown.

F

Federal Poverty Level (FPL)

An income benchmark the government uses to figure out who qualifies for things like subsidies or Medicaid. It changes based on the size of your household. It also gets updated each year.

Flexible spending account (FSA)

An employer-sponsored account that lets you set aside money for healthcare. You choose how much to put in the account up to the federal limits, and the money comes out of your paycheck before taxes. Most FSAs follow a “use it or lose it” rule. That means funds don’t roll over into the next year, so it’s best to spend the money.

Formulary

Your plan’s approved drug list. It shows which prescriptions are covered and how much you’ll likely pay for each.

G

Generic drug

The lower-cost version of a brand-name medication. It contains the same ingredients and is just as safe and effective.

Grace period

The extra time you get to catch up on a missed premium payment. Your coverage continues during this window. But if you don’t pay in time, it can end.

H

Health insurance marketplace

The Health Insurance Marketplace® is a service that helps you shop for and enroll in health insurance. Most states use the federal platform at Healthcare.gov, while others run their own versions. Think of it as the digital center for checking your options, comparing plan details, and seeing if you qualify for subsidies.

Health maintenance organization plan (HMO)

A type of plan where you pick a primary care doctor who’s covered by the plan. You’ll need them to refer you to specialists. And you have to see in-network providers unless it’s an emergency.

Health reimbursement arrangement (HRA)

An employer-funded account for eligible healthcare expenses. Your employer adds money to it. You pay for what you need, then get reimbursed tax-free. All the funds come from your employer. Not your paycheck.

Health savings account (HSA)

A special savings account where you can set aside pre-tax dollars to pay for eligible healthcare expenses. You can only open and contribute to an HSA if you’re enrolled in a high-deductible health plan (HDHP). The money is yours to keep. It rolls over year to year. And it can be used now or in the future.

High-deductible health plan (HDHP)

A plan with a higher deductible and lower monthly premiums. That means you’ll pay more upfront when you get care. Many people pair this plan with a health savings account (HSA) to save extra money for medical expenses.

I

In-network

Providers and facilities that work with your insurance. Stick with them, and you’ll usually pay less. Step outside the network, and your share of the bill can climb quickly.

Individual Coverage Health Reimbursement Arrangement (ICHRA)

A benefit where your employer gives you money to buy your own coverage. They give you a set allowance. You choose your plan(s) and pay the premium. Then you get reimbursed.

Individual mandate

The rule that once required you to pay a fine if you didn’t have health insurance. There’s no longer a federal fine. But a few states still enforce their own.

L

Lifetime limit

A cap on how much your plan will pay over your lifetime. Today, essential health benefits (like preventive care and prescriptions) can’t have lifetime limits.

M

Marketplace

The online place where you shop for ACA health plans.

Maximum out-of-pocket (MOOP)

The most you’ll pay in a year for covered healthcare. Once you reach that limit, your plan pays for 100% of covered services for the rest of the year.

Metal tiers (Bronze, Silver, Gold, Platinum)

Labels that describe how you and your plan share costs. Don’t worry — it doesn’t affect the quality of care.

Bronze = lower monthly payments, higher costs when you need care. Platinum = higher monthly payments, lower costs when you use care. Silver and Gold sit in the middle.

N

Network

The providers and facilities that work with your insurance. Stay in-network, and you’ll usually pay less. Go outside it, and costs rise.

No Surprises Act

A federal law that protects you from certain unexpected medical bills. Let's say you accidentally see an out-of-network provider at an in-network facility. This law saves you from having to pay extra.

O

Open enrollment period (OEP)

The once-a-year window when you can sign up for or change your health insurance. It typically runs from Nov. 1 to Dec. 31. Outside of OEP, you need a major life event — like moving or getting married — to enroll or make changes.

Out-of-network

Providers and facilities that don’t work with your insurance. Your plan pays less or not at all for their services, which means higher costs for you.

Out-of-pocket costs

What you actually pay when you use your coverage (like deductibles, copays, and coinsurance).

Out-of-pocket estimate

A preview of what you might personally have to pay for a healthcare service. It takes into account your coverage, deductible, and the provider’s rates. It’s not exact. But it helps you plan ahead instead of being surprised later.

Out-of-pocket maximum

The most you’ll have to spend on covered care in a year. No matter what. After you hit that number, your plan

P

Plan year

The 12-month period your health insurance is active.

Point of service plan (POS)

A type of plan that blends features of HMOs and PPOs. You pick a primary care provider who manages your care and refers you to specialists (like an HMO). But you can also visit out-of-network providers if you’re willing to pay more (like a PPO).

Pre-authorization

(Same as prior authorization.) An approval that your insurance company requires before it’ll cover certain services or medications. Your provider will submit a request. Then you’ll wait for the insurance company to give you the green light.

Pre-existing condition

Any illness, injury, or health condition you had before your new insurance plan starts. Asthma, diabetes, and a history of cancer are some common examples.

Preferred provider organization plan (PPO)

A plan that lets you see providers both in and out of network. You usually don’t need a referral to see a specialist. Stay in-network to pay less. Go outside it, and your share of the bill rises.

Premium

The monthly cost of your health insurance.

Prescription drug tier

Insurance plans group medications into “tiers” based on their cost. Lower tiers include generic medications and cost less. Higher tiers include brand-name or specialty drugs and cost more.

Preventive care

The basics that keep you well and catch health problems early. Think yearly checkups, vaccines, and routine screenings. Most plans cover these at no cost when you use in-network providers. In other words: Staying proactive usually won’t cost you extra.

Primary care provider (PCP)

Your go-to doctor for everyday health needs. They handle routine visits and manage ongoing concerns. Depending on your plan, your PCP may also coordinate your care and refer you to specialists.

Prior authorization

(Same as pre-authorization.)An approval that your insurance company requires before it’ll cover certain services or medications. Your provider will submit a request. Then you’ll wait for the insurance company to give you the green light.

Provider directory

A list of in-network providers and facilities. Just remember: Directories aren’t always perfectly up-to-date. So it’s smart to confirm with the provider or plan before getting care.

Q

Qualifying life event (QLE)

A major life change that unlocks a special enrollment period. That way, you don’t have to wait for the once-a-year open enrollment to get coverage. Common QLEs include moving, getting married, having a baby, and losing job-based insurance.

R

Referral

A sign-off from your primary care provider to see a specialist. Some plans require it, meaning they won’t cover your visit without it.

Rollover

When your FSA lets you carry some leftover funds into the next year instead of losing them. There’s a limit on how much can roll over, and not every FSA includes this feature. Think of it as the exception, not the rule.

S

Short-term limited duration insurance (STLD) or short-term medical (STM)

A temporary health plan meant to cover you for a short period (like between jobs). These plans cost less, but they’re much more limited. They usually cover fewer healthcare services. And they may not cover you if you have a pre-existing condition.

Special enrollment period (SEP)

A short window that lets you sign up for health insurance outside of the once-a-year open enrollment period. You get an SEP after certain life changes, like getting married, having a baby, or moving.

Specialist

A doctor who treats a specific part of the body or type of condition. Like a heart doctor (cardiologist) or a skin doctor (dermatologist). Depending on your plan, you might need a referral from your primary care provider before insurance covers the visit.

Subsidy

Financial help from the government that makes health insurance more affordable. Whether you qualify — and how much you save — depends on your income.

Summary of benefits & coverage (SBC)

A document that explains what a plan covers, what it costs, and how you and the insurer split expenses. Think of it as the plan’s quick-reference guide.

Supplemental benefits (also known as ancillary benefits)

Optional coverage that layers on top of your main health plan (like dental, vision, accident, and critical illness insurance). These plans cover specific needs your primary insurance may not fully cover.

T

Tiered network

A network that categorizes in-network providers based on how much they cost. Even though they’re all “in-network,” some are more affordable than others. The higher the tier, the bigger the bill.

U

Urgent care

Treatment for issues that are urgent, but not life-threatening. It’s usually quicker and less expensive than the ER. Think sprains, UTIs, or a sudden fever.

V

Virtual care (telehealth)

Seeing a doctor without physically going to the doctor. You connect by video or phone, usually from home. It’s a simple option for minor illnesses, follow-ups, or quick questions.

Vision insurance

Insurance that covers routine eye care, like exams and glasses. It’s usually separate from your main health plan.

W

Waiting period

A gap between when you sign up for coverage and when some of that coverage actually kicks in. For example, a dental plan might cover cleanings right away. But then make you wait a few months before it helps pay for something bigger, like a crown.