There is no single federal law that answers how long a hospital has to bill you for services. The outer limit on collection comes from your state’s statute of limitations on contract debt, which runs anywhere from three to ten years depending on the state and whether the agreement was written or oral. Inside that window, separate rules govern what a hospital can charge when it misses an insurance filing deadline, how long an uninsured patient has to dispute an inflated bill, and how quickly a nonprofit hospital can send an account to collections.
The Outer Limit: State Statutes of Limitations
No federal statute caps how many months or years can pass before a hospital mails you a bill. What federal and state law do cap is how long the hospital, or a collector standing in its place, can sue you to force payment. Because medical services create either a written or an implied contract, the applicable deadline is usually the contract statute of limitations in the state where care was provided.
For written contracts, that period ranges from three years in states such as Delaware, Maryland, and New York to ten years in states such as Illinois, Indiana, and Iowa. Oral contract statutes tend to be shorter. The clock generally starts when the account first becomes delinquent, meaning the date a required payment was missed, though some states measure from the date of the last payment made on the account.
Once that period runs out, the debt is “time-barred.” A hospital or collection agency can still ask you to pay, but it cannot file a lawsuit to force collection, and federal rules that apply to third-party debt collectors prohibit them from bringing or threatening a lawsuit on time-barred debt.1Consumer Financial Protection Bureau. 12 CFR 1006.26 – Collection of Time-Barred Debts If a collector sues anyway, the expired statute is a complete defense. The case should be dismissed, but only if you raise the defense. Courts do not check for you.
When the Hospital Misses the Insurance Filing Deadline
Before the hospital calculates what you owe, it has to bill your insurer. Insurance contracts impose their own deadline for that, called the timely filing limit. Medicare requires providers to submit claims within 12 months of the date services were furnished, and claims filed after that window are denied outright with no right of appeal.2Centers for Medicare & Medicaid Services (CMS). Transmittal 2140 – Changes to the Time Limits for Filing Medicare Fee-For-Service Claims Private insurers set their own limits, commonly between 90 days and one year.
The important question for you is what the hospital can do when it misses that deadline. A common belief is that the provider can simply turn around and bill the patient for the full amount. That is usually wrong. Under Medicare rules, if the provider caused the late filing, it cannot charge the beneficiary anything beyond the normal deductible and coinsurance that would have applied.2Centers for Medicare & Medicaid Services (CMS). Transmittal 2140 – Changes to the Time Limits for Filing Medicare Fee-For-Service Claims Most in-network provider contracts with private insurers contain similar language: if the claim is denied because the provider filed late, the provider absorbs the loss and cannot pass the charge to you.
The exposure is higher with out-of-network care, or when a provider’s contract does not contain that protection. In those situations the hospital can pursue you for the balance as long as the state statute of limitations has not expired. If you receive a bill claiming your insurance denied a claim for late filing, call your insurer and ask whether your plan’s provider agreement prohibits that charge. Many patients pay bills they were never legally required to pay.
If You Are Uninsured or Self-Pay
If you do not have insurance or choose not to use it, the No Surprises Act requires providers to give you a Good Faith Estimate of expected charges before scheduled services. When you schedule at least three business days out, the estimate is due within one business day. When you schedule at least ten business days ahead, or simply request a cost estimate without scheduling, the provider has up to three business days.3CMS. No Surprises: What’s a Good Faith Estimate
The estimate is not just informational. If your final bill exceeds the Good Faith Estimate by $400 or more, you can start a formal dispute through the Patient-Provider Dispute Resolution process. You have 120 calendar days from the date on the original bill to open that dispute.4Centers for Medicare & Medicaid Services (CMS). Good Faith Estimate and the Patient-Provider Dispute Resolution Process for Uninsured or Self-Pay Individuals Miss the 120-day window and you lose this specific remedy even if the overcharge is real.
Nonprofit Hospitals: 120 and 240-Day Windows
Roughly half of U.S. hospitals are tax-exempt nonprofits, and federal tax rules impose meaningful timing constraints on their collection activity. Under Section 501(r) of the Internal Revenue Code, these hospitals must maintain a written financial assistance policy and cannot rush patients into aggressive collection.
Two windows matter, both measured from the date the hospital sends the first billing statement after you leave the facility. For the first 120 days, the hospital cannot take any “extraordinary collection actions,” which includes reporting the debt to credit bureaus, selling it to a collector, or filing a lawsuit. For a full 240 days, you can submit a financial assistance application. If you send in an incomplete application inside that window, the hospital must tell you what is missing and give you a reasonable chance to complete it.5Internal Revenue Service. Billing and Collections – Section 501(r)(6)
So if you received care at a nonprofit hospital and cannot afford the bill, you have at least 240 days from that first statement to apply for reduced or waived charges. Many patients never learn these policies exist because hospitals bury them on their websites. Ask the billing department directly for the financial assistance application. If the hospital takes collection action before these deadlines, that is a compliance violation that can threaten its tax-exempt status.
What to Do When a Late Bill Arrives
A bill turning up months or years after the date of service is unsettling, but ignoring it is the worst move. Work through it in order.
Verify the Charges
Confirm the date of service, the provider’s name, and the procedures listed. Compare the bill against your own records and any Explanation of Benefits from your insurer. Billing errors are common enough that this step alone catches real problems. If the charges were run through insurance, check whether the insurer processed or denied the claim, and if denied, why.
Request Debt Validation
If the bill comes from a collection agency rather than the hospital, federal law gives you leverage. Within five days of first contacting you, the collector must send a written notice identifying the debt, the amount, and the original creditor. You then have 30 days from receiving that notice to dispute the debt in writing. Once you do, the collector must stop all collection activity until it sends you verification.6Office of the Law Revision Counsel. 15 USC 1692g – Validation of Debts Disputing after the 30 days does not trigger the same obligation to pause.
Check Your State’s Statute of Limitations
Look up the contract statute of limitations in the state where the services were provided. Your state attorney general’s website is usually the most reliable free source. If the statute has expired, the debt is time-barred, and a collector cannot sue you or threaten to sue.1Consumer Financial Protection Bureau. 12 CFR 1006.26 – Collection of Time-Barred Debts
If you believe the debt is time-barred, say so in writing by certified mail. State that the statute of limitations has expired and that you dispute the collector’s right to pursue the debt. Keep a copy. Do not acknowledge that you owe the amount, and do not send a payment, not even a small one.
Actions That Can Reset the Clock
The statute of limitations is not always a fixed countdown. Certain actions on your part can restart the entire period and hand the creditor a fresh window to sue.
The most dangerous is making a payment. In many states, even a small partial payment on an old debt is treated as a new acknowledgment of the obligation, and the statute resets from the date of that payment. Collection agencies know this, which is why they sometimes ask for a token “goodwill” payment of $10 or $20. That small amount can revive years of legal exposure.7Consumer Financial Protection Bureau. Can Debt Collectors Collect a Debt That’s Several Years Old
Written acknowledgment can do the same thing in some states. Replying to a collection letter with “I know I owe this but I can’t pay right now,” or signing a new payment plan, can be enough to restart the period. If you are dealing with a debt near the end of its statute, be careful what you say in any communication with the collector, written or verbal.
State rules on revival vary. Some require a written promise to pay, some treat any partial payment as sufficient, and a few do not allow the statute to restart at all once it has expired. Find out how your state handles revival before engaging with a collector on an old debt.
A Note on Credit Reporting
Whether the hospital can still legally bill you is a separate question from whether the debt can appear on your credit report. The three major credit bureaus voluntarily adopted a one-year waiting period before medical debt shows up. Paid medical collections are removed entirely, and unpaid medical collections under $500 are excluded.8Consumer Financial Protection Bureau. Have Medical Debt? Anything Already Paid or Under $500 Should No Longer Be on Your Credit Report A broader CFPB rule finalized in early 2025 would have banned medical debt from credit reports entirely, but a federal court vacated it in July 2025, so it never took effect.9Consumer Financial Protection Bureau. CFPB Finalizes Rule to Remove Medical Bills from Credit Reports The voluntary bureau policies remain, though they are not enforceable the way a regulation would be. If you find a medical collection on your report that was paid, is under $500, or appeared before the one-year mark, dispute it directly with the bureau.