Quick answer
The worst case is a serious illness or injury that leaves you with tens or hundreds of thousands of dollars in medical bills, debt collection and damaged finances. Hospitals must treat you in an emergency, but they’ll bill you at full price. You also usually can’t buy an ACA plan the moment you get sick; you have to wait for open enrollment unless you have a qualifying life event or qualify for Medicaid.
Key takeaways
- Without insurance, you pay full price, with no out-of-pocket limit.
- Emergency rooms must screen and stabilize you regardless of ability to pay, but they still bill you.
- You generally can’t buy a marketplace plan after you get sick until open enrollment.
- There’s no federal penalty for being uninsured, but CA, MA, NJ, RI and DC have state penalties.
- Medicaid, financial assistance and payment plans can help if you’re already facing bills.
On this page
Full-price bills
Insurance gets you negotiated prices and caps what you pay in a year, $10,600 for one person in 2026 on an ACA plan. Without it, you pay the full charge for every visit, test and prescription. An illness like appendicitis can mean an ER visit, surgery and a hospital stay. A chronic condition like diabetes means ongoing visits and prescriptions for years. See why health insurance is so expensive.
Emergency care
Under a federal law called EMTALA, hospitals with emergency departments must screen and stabilize anyone with an emergency, regardless of insurance or ability to pay. That doesn’t make the care free. You’ll get the bill afterward.
Medical debt
Unpaid bills can go to collections. The major credit bureaus no longer report medical debts under $500 or paid medical debts, and they wait a year before reporting others. A 2025 federal rule that would have removed all medical debt from credit reports was struck down, but 15 states and DC have their own limits. Nonprofit hospitals must wait at least 120 days after the first bill before taking extraordinary collection actions, and must offer financial assistance to eligible patients.
Waiting to get covered
You can’t count on buying insurance after you get sick. Marketplace plans are sold only during open enrollment (November 1 to January 15 on HealthCare.gov for 2027 coverage) or after a qualifying life event. Medicaid is the exception: you can apply any time, and it can cover bills from up to three months before you apply if you were eligible then.
State penalties
There’s been no federal penalty for going without coverage since 2019. California, Massachusetts, New Jersey, Rhode Island and the District of Columbia charge their own penalties on state tax returns.
If you’re uninsured and need care now
- Apply for Medicaid if your income is low. See health insurance for low-income families.
- Check for a special enrollment period if you recently lost coverage, moved or had a baby.
- Ask for a good faith estimate before scheduled care. If the bill comes in $400 or more above it, you can dispute it.
- Use community health centers, which charge on a sliding scale based on income.
- Ask the hospital about financial assistance and payment plans.
- At 65, see who is eligible for Medicare.
Why coverage is usually worth it
If you’re thinking of going without, compare the real cost of coverage after a tax credit. Premiums, deductibles and copays are predictable; an uncovered hospital stay isn’t. A high-deductible plan paired with an HSA can keep premiums down while still protecting you from huge bills. See the cheapest ways to get health insurance, what to consider when comparing rates, how many insurers to compare and what if you can afford your medical bills out of pocket.
Related guides: what an ER visit costs without insurance, what a doctor visit costs without insurance and what it costs to have a baby.
See what coverage would cost you after tax credits: compare quotes by ZIP code.
Frequently asked questions
Can a hospital refuse to treat me without insurance?
Not in an emergency. Hospitals with emergency departments must screen and stabilize you. For non-emergency care, providers can ask for payment upfront.
Is there a penalty for not having health insurance?
Not federally. Five places have state penalties: California, Massachusetts, New Jersey, Rhode Island and DC.
Can I get insurance right after I get sick?
Usually only if you qualify for Medicaid or have a qualifying life event. Otherwise, you’ll have to wait for open enrollment.
Sources
This article is general information, not legal or financial advice. Last reviewed September 2026.