How Health Insurance Actually Works

What health insurance does

Health insurance is a contract that shares the cost of covered healthcare between a member and an insurer or health plan. The member usually pays a premium to keep coverage and may also pay deductibles, copays, and coinsurance when receiving care.

The plan document controls what is covered and how much each party pays. These terms help you read it:

Premium: What you pay to have the insurance, regardless of whether you use it. Like a monthly subscription fee. Until age 26, you can stay on a parent's insurance plan, one of the most valuable financial benefits many young adults miss.

Deductible: The amount you pay for covered services before the plan begins paying for services subject to the deductible. A plan may cover some services before the deductible, and family plans may have individual and family deductibles. Many non-grandfathered plans cover specified in-network preventive services without cost sharing, but the exact service, network, and billing rules matter.

Copay: A fixed amount the plan requires for a covered service, such as a hypothetical $25 office-visit copay. Whether it applies before or after the deductible depends on the plan.

Coinsurance: A percentage of the plan's allowed amount that you pay for a covered service. In a simplified 80/20 arrangement after the deductible, the plan pays 80% of the allowed amount and you pay 20%.

Out-of-pocket maximum: The plan-year cap on what you pay for covered in-network essential health benefits through deductibles, copays, and coinsurance. It generally does not include premiums, out-of-network care, non-covered services, or charges above an allowed amount. After the applicable maximum is met, the plan pays the covered in-network benefit according to its terms. The federal ceiling changes by plan year, and a plan may use a lower amount, so read the current plan documents.

In-network vs out-of-network

Plans contract with specific doctors, hospitals, and labs to form a network. In-network care commonly has lower member cost sharing. Depending on the plan and legal protections, out-of-network care may have higher cost sharing, no plan payment, or additional balance-billing exposure.

Before any non-emergency appointment:

• Call the doctor's office to confirm they accept your insurance
• If going to a hospital, verify it is in-network
• For scheduled care, ask both the plan and providers about network status and obtain a written cost estimate when available; federal and state surprise-billing protections may apply in some situations

High-deductible plans and HSAs

An HSA-eligible high-deductible health plan must satisfy current IRS requirements. Not every plan with a large deductible is HSA-eligible. IRS deductible, out-of-pocket, and contribution limits change by year, so verify the current plan and tax-year rules before contributing to a Health Savings Account.

Eligible HSA contributions may be deductible or excluded from federal taxable income when made through an employer plan. Earnings are not federally taxed while in the account, and distributions for qualified medical expenses are federally tax-free. State treatment can differ. Unused HSA funds carry forward. Health FSAs follow separate rules and may offer a limited carryover or grace period if the employer's plan allows it. An HSA-eligible plan can be useful, but it is not inherently the lowest-cost choice; compare total expected costs, care needs, network, prescriptions, and ability to cover the deductible.

Types of plans

• HMO (Health Maintenance Organization): Commonly uses a defined network and may require a primary care physician or referrals. Review the specific HMO's rules.
• PPO (Preferred Provider Organization): Commonly allows more out-of-network access and fewer referral requirements, usually with different costs. Review the specific PPO's rules.
• HDHP (High-Deductible Health Plan): A plan with a higher deductible under its terms. Only a plan meeting current IRS requirements can make an otherwise eligible person eligible to contribute to an HSA.

What to do before you need healthcare

1. Know your deductible and out-of-pocket maximum
2. Keep your insurance card accessible (photograph it with your phone)
3. Know how to find in-network providers (your insurer's website or app)
4. Understand what preventive care is covered at 100%
5. Keep a health emergency fund to cover your deductible if something unexpected happens

Know your plan before you need care

Review the summary of benefits and coverage, provider directory, prescription list, deductible, and out-of-pocket maximum before scheduling non-emergency care. For a bill, compare the provider statement with the plan's explanation of benefits and ask questions about any mismatch.