What is medical debt, and how does a bill turn into debt?

What counts as medical debt?

Medical debt is money you still owe for health care. It is what is left after your insurance pays its share, or the whole bill when you had no insurance. It can come from a hospital, a doctor, a dentist, a lab or an ambulance service.

A bill is not debt the day it arrives. It becomes debt when it stays unpaid after its due date. From then on, the provider can try to collect it, and so can anyone it hands the account to.

Among adults with medical debt, the most common source was a hospital. The share who named a hospital was 52.1% (Urban Institute, December 2025). Others named bills from specialists, dental care and regular doctor visits, and many named more than one Source 11.

How common is it, even with insurance?

Very common. In a national survey, the share of US adults who said they or a family member owed medical or dental bills they could not pay in full was 26.6% (Urban Institute, December 2025).

Insurance helps, but it does not prevent medical debt. A deductible, coinsurance, care your plan does not cover and bills from out-of-network providers can all leave you owing money. In the same survey:

• Among insured adults, the share who reported medical debt was 25.7% (Urban Institute, December 2025).
• Among uninsured adults, it was 35.2% (Urban Institute, December 2025).

Many of these debts are large, as the key facts above show.

How does an unpaid bill end up with a collector?

It usually happens in steps, and none of them is automatic:

1. Statements. The provider's billing office sends bills and reminders. This is the best time to ask for financial assistance, an itemized bill or a payment plan.
2. A collection agency or a debt buyer. The provider may hand the account to a collection agency, or sell it. Unpaid medical bills are often sold in bulk, and a debt buyer then tries to collect the full amount.
3. A credit report or a lawsuit. In some cases the debt is reported to a credit bureau, or the provider or collector sues.

Nonprofit hospitals must slow down. Before they sell a debt, report it to a credit bureau, sue or take other extraordinary collection actions Source 22, they must wait after the first bill they send once you leave the hospital. The wait is at least 120 days (IRS, published July 2, 2026).

Who is collecting also matters. Federal debt collection law covers collection agencies, debt buyers and collection law firms. A hospital billing office that collects its own bills in its own name is generally not covered by that law, though state law may apply Source 33.

When can it reach my credit report?

Less often than it used to. The three national credit bureaus follow their own policy, not a federal law:

• Paid medical collections are left off credit reports Source 44.
• Unpaid medical collections must wait a year before they can appear Source 44.
• Small medical collections are left off too: those whose first reported balance was under a set amount. That amount is $500 (Equifax, Experian and TransUnion joint release, Effective April 11, 2023).

Because this is a voluntary policy, larger unpaid medical collections that are more than a year old can still be reported in states without a law of their own Source 55. Our guide to medical debt and your credit report lists the states that restrict it and the court cases that may change those laws.

Who is most likely to have medical debt?

Anyone can end up with medical debt, but the same survey found it more often among people who need more care or have less room in their budget. Adults with a disability reported it more often than adults without one, and so did adults in fair or poor health Source 11. Rates were also higher for adults whose income was just above the poverty line Source 11, for adults in middle age Source 11, and for Black and Hispanic adults Source 11.

Two examples from that survey:

• Among adults with a disability, the share who reported medical debt was 41.1% (Urban Institute, December 2025) Shares by group from one survey; they describe who reported debt, not why.
• Among adults whose family income was just above the poverty line, the income group with the highest rate, it was 37.8% (Urban Institute, December 2025) Shares by group from one survey; they describe who reported debt, not why.

Is a medical bill on a credit card still medical debt?

You still owe money for health care, but now you owe it to a lender, not to the provider. That is also true of a medical credit card or a loan offered at the doctor's office.

Be careful with offers of no interest. The Consumer Financial Protection Bureau (CFPB) found that many medical credit cards and loans use deferred interest: if any balance is left when the offer ends, interest is charged for the whole time since the purchase. It also found that patients who should qualify for financial assistance may be signed up for a card instead. The share of health care purchases on deferred-interest products that ended up charged interest was 20% (CFPB, 2015 to 2020).

Before you put a medical bill on any card, ask the provider about financial assistance and an interest-free payment plan.

What can I do if I have medical debt now?

1. Ask for financial assistance. Ask the billing office for the financial assistance policy and the application, even if the bill is old. A nonprofit hospital must accept applications for a long time after the first bill, and many accept later ones Source 22. Our guide to charity care walks through it.
2. Check the bill. Ask for an itemized bill and look for mistakes. Our guide on medical billing errors shows what to look for.
3. Ask for a plan you can keep. Our guide to payment plans explains what to ask for and what to avoid.
4. Know your rights with collectors. Our guide on medical debt in collections explains how to check a debt and what a collector may not do.
5. Check your credit reports for free. You can get them from each of the three bureaus at AnnualCreditReport.com, the only official site Source 77.

If you can't pay at all, start with our guide on what happens if you can't pay a medical bill.