Providers can bill patients months or even years after a service because most states have no timely billing law, and the few that do set deadlines of 10-12 months — long after a patient has budgeted and moved on

There is no federal law requiring healthcare providers to send a bill to patients within any specific timeframe. Timely billing requirements vary wildly by state and payer. Medicare requires claims to be filed within 12 months. Medicaid deadlines range from 90 days (Texas) to 365 days (Ohio). Commercial insurers set their own deadlines, ranging from 90 days (Cigna, UnitedHealthcare) to one year (some BCBS plans). But these are deadlines for the provider to bill the insurer — not the patient. A provider can bill the insurer within the filing deadline, have the claim denied or partially paid, and then send the balance to the patient months or years later. This matters because patients cannot budget for healthcare costs when bills arrive unpredictably, long after the service. A patient has surgery in January, receives and pays the hospital bill in March, believes the episode is financially closed, and then receives a separate bill from the anesthesiologist in September and a lab bill in November. Each bill restarts the patient's financial stress cycle. Late-arriving bills are also harder to dispute because the patient's memory of what happened has faded, medical records may need to be re-requested, and the patient may have already hit (or not yet hit) a new year's deductible, changing their cost-sharing calculation. For patients on fixed incomes or tight budgets, an unexpected $800 bill arriving 8 months after a procedure can trigger a cascade of financial harm. This problem persists because providers and billing companies benefit from flexibility. Complex cases involve multiple providers, each billing separately, and insurance adjudication can take weeks or months. Providers argue that timely billing mandates would force them to absorb costs when insurance processing is slow. Only a handful of states — notably Texas, which requires providers to send bills within 10 months — have enacted patient-facing timely billing laws with actual penalties for non-compliance. The absence of a federal standard means patients in most states have no legal protection against stale bills, and the medical billing industry has successfully lobbied against uniform deadlines by arguing that the complexity of multi-payer adjudication makes fixed deadlines impractical.