Glossary of Common Terms

This is a living document designed to translate confusing insurance jargon into plain English. The healthcare system is intentionally complex; understanding the language is the first step to reclaiming your power.

Appeal

  • Simple Definition: A formal request you make to your insurance company to reconsider its decision to deny payment for a service or treatment.
  • What This Means For You: This is your right to fight back. Insurers often issue denials hoping you won’t have the time or energy to appeal. Never accept the first “no” as the final answer. An appeal is your first official step in challenging their decision.

Co-payment (Copay)

  • Simple Definition: A fixed, flat fee you pay for a specific medical service or prescription at the time you receive it.
  • What This Means For You: This is the predictable cost you can expect for routine things. For example, you might have a $30 copay for a doctor’s visit or a $15 copay for a generic prescription, regardless of the total cost of the visit or drug.

Coinsurance

  • Simple Definition: The percentage of the cost for a covered health care service that you are required to pay after you have met your deductible.
  • What This Means For You: This is where the math gets tricky. If your plan has 20% coinsurance, you pay 20% of the bill and the insurer pays 80%. A $1,000 bill would cost you $200. This is a common source of surprise bills because it’s a percentage, not a flat fee.

Deductible

  • Simple Definition: The fixed amount of money you must pay out-of-pocket for covered medical services each year before your insurance company starts to pay.
  • What This Means For You: Think of this as your “spend-down” amount. If you have a $3,000 deductible, you are essentially paying for all of your medical care (except for services with a flat copay) until your bills total $3,000. High-deductible plans have lower monthly premiums but expose you to significant upfront costs.

Explanation of Benefits (EOB)

  • Simple Definition: A document sent by your insurer after you receive care that details what was billed, what the insurer paid, and what you are responsible for paying. This is not a bill.
  • What This Means For You: This is your audit report. You should always review your EOB to check for errors, like being billed for a service you didn’t receive. Wait for the actual bill from your doctor’s office before paying anything, and make sure it matches the EOB.

Fixed Indemnity Plan

  • Simple Definition: A type of plan that pays a fixed, predetermined dollar amount for specific medical services (e.g., “$100 for a doctor visit” or “$200 per day in the hospital”), regardless of the actual cost. This is not comprehensive health insurance.
  • What This Means For You: This is “Temu insurance.” These plans are often sold as low-cost alternatives but carry significant financial risk. If your hospital stay costs $5,000 a day and your plan only pays $200, you are responsible for the remaining $4,800. These plans are not ACA-compliant and often do not have an out-of-pocket maximum, meaning your potential costs could be unlimited.

Formulary

  • Simple Definition: A list of prescription drugs that are covered by your health insurance plan.
  • What This Means For You: This is the insurer’s “approved” drug list. If your doctor prescribes a drug that is not on the formulary, you will likely have to pay the full cash price. Always check the formulary before choosing a plan if you take regular medications.

Health Maintenance Organization (HMO)

  • Simple Definition: A type of health plan that usually limits coverage to care from a specific network of doctors. It often requires you to choose a Primary Care Physician (PCP) and get a referral from them to see a specialist.
  • What This Means For You: HMOs typically have lower premiums but offer less flexibility. You have to “play by their rules” (PCP, referrals, in-network only) to get your care covered.

In-Network

  • Simple Definition: Doctors, hospitals, and other healthcare providers that have a contract with your insurance company to provide services at a pre-negotiated, discounted rate.
  • What This Means For You: Staying in-network is the single most important rule for keeping your costs down. Going out-of-network is the fastest way to get hit with a massive, unexpected bill.

Out-of-Network

  • Simple Definition: Providers who do not have a contract with your insurance company.
  • What This Means For You: If you see an out-of-network provider, your insurance will pay very little or nothing at all, and you will be responsible for the full, non-discounted bill. This is a major financial risk.

Out-of-Pocket Maximum

  • Simple Definition: The absolute most you will have to pay for covered services in a single plan year. After you spend this amount on deductibles, copayments, and coinsurance, your health plan pays 100% of the costs of covered benefits.
  • What This Means For You: This is your financial safety net. It protects you from bankruptcy in a catastrophic medical event. Your monthly premiums do not count toward this maximum.

Preferred Provider Organization (PPO)

  • Simple Definition: A type of health plan with a network of “preferred” providers. It offers more flexibility than an HMO, as you can see specialists without a referral and have some coverage for out-of-network care (though you’ll pay more).
  • What This Means For You: PPOs offer more freedom of choice but usually come with higher monthly premiums. It’s a trade-off between cost and flexibility.

Premium

  • Simple Definition: The fixed amount of money you pay to the insurance company every month to keep your health plan active.
  • What This Means For You: This is your membership fee. You must pay it every month, whether you use your medical services or not. This payment does not count towards your deductible or out-of-pocket maximum.

Prior Authorization (Pre-Authorization)

  • Simple Definition: A decision by your health insurer that a health care service, treatment plan, prescription drug, or durable medical equipment is medically necessary. It’s an approval you must get before receiving the care.
  • What This Means For You: This is one of the most frustrating hurdles in the system. Your insurer can act as a gatekeeper, delaying or denying care your doctor has already recommended. It’s a cost-control measure for them and a major administrative burden for you and your doctor.

Subsidy (Premium Tax Credit)

  • Simple Definition: Financial assistance from the government to help you pay for your monthly premium. It’s available to people who buy their own insurance through the ACA Marketplace and have an income within a certain range.
  • What This Means For You: his is the mechanism that makes insurance affordable for millions of people. The amount you get is based on your estimated income for the year. If your income changes, you must report it to the Marketplace to avoid having to pay money back at tax time.