The short version
- Uninsured and self-pay patients are owed a written good faith estimate: within 1 business day of scheduling anything booked at least 3 business days out, within 3 business days where it was booked at least 10 business days out, and within 3 business days of any request.
- The dispute opens where a provider bills at least $400 above the expected charges listed for **that same provider** on the estimate. It is not the total bill against the total estimate.
- Notice has to be postmarked within 120 calendar days of receiving the initial bill containing the excess charge, with a small administrative fee set by HHS through guidance. If the entity lands below the billed charge, the fee comes off what you owe.
- For a listed item the provider cannot justify, the amount payable is reset to the estimate. For an item that never appeared on the estimate at all, it is reset to $0. The determination binds both sides absent fraud.
This is the half of the No Surprises Act that has nothing to do with networks. Balance billing, the notice-and-consent form and the 72-hour rule are a separate mechanism, covered in the guide to the surprise billing waiver. What follows applies to people with no insurance, and to insured people who have chosen not to put a particular item through their coverage — a group the regulation treats identically.
Who is owed an estimate, and when it has to arrive
An uninsured (or self-pay) individual under 45 CFR 149.610 is either someone with no benefits for the item under a plan, insurance, a federal health care programme or FEHB coverage — or someone who has such benefits but does not seek to have a claim submitted. The second limb is the one people miss. Choosing to pay cash for a consultation you would rather keep off a claim history puts you inside this regime for that item, insurance card in your pocket or not.
The provider must work this out rather than wait to be told: ask whether you are covered, ask whether you intend to submit a claim, and tell every uninsured or self-pay patient that an estimate is available — in the office, on a website a search engine can find, and orally when scheduling.
When the written estimate falls due
10+ days out
Booked well ahead
Estimate due within 3 business days of scheduling.
3+ days out
Booked this week
Estimate due within 1 business day of scheduling.
On request
Nothing booked yet
Due within 3 business days of the request, whether or not you go ahead.
Under 3 days
Booked at short notice
No estimate is owed on scheduling alone. Ask for one, and the request deadline applies instead.
What arrives has a fixed content list: an itemised breakdown grouped by provider, diagnosis and service codes, expected charges per line, each provider's name, NPI and tax number, and three disclaimers — that it is only an estimate, that it is not a contract and does not commit you to anyone named on it, and that you may dispute charges substantially above it. The last of those must add that filing will not affect the quality of your care.
The estimate then becomes part of your medical record and is kept like one: on request the provider must hand you a copy of any estimate it issued in the last six years, which is why "we do not have it on file" is rarely the end of the conversation. A health information release is the instrument that gets the file moving.
The $400 test is applied one provider at a time
This is where most self-assessments go wrong. "Substantially in excess" is defined as at least $400 more than the total expected charges listed on the good faith estimate for that provider or facility. Eligibility is decided line by line, against each named party's own figure — not by subtracting one grand total from another.
| The comparison people make | The comparison the rule makes | Why the difference matters |
|---|---|---|
| Total billed against total estimated | Each provider's billed total against that provider's own line on the estimate | An episode hundreds over in aggregate can contain no eligible dispute at all |
| Anyone who treated me | Providers and facilities named on the estimate | A provider who never appeared has no expected figure to be measured against |
| One argument about one bill | A separate determination for each unique item or service | A line missing from the estimate is treated differently from one on it |
What the dispute entity actually decides
A selected dispute resolution (SDR) entity does not weigh whether the price is fair. It asks a single question about each disputed line: has the provider supplied credible information — information that on critical analysis is worthy of belief — that the gap reflects the cost of a medically necessary item and rests on unforeseen circumstances that could not reasonably have been anticipated when the estimate was written?
Both limbs have to hold. Medically necessary but foreseeable fails. Unforeseen but not medically necessary fails. A price rise, a coding correction or an item the practice simply forgot to include is not an unforeseen circumstance.
Where each line lands
Was this line on the good faith estimate?
Yes, and it was billed higher
With no credible information for the difference, the amount payable is reset to the expected charge on the estimate. The overage simply goes.
No, it never appeared
With no credible information for it, the entity must set the amount payable for that new item at $0.
The determination binds both parties absent fraud or misrepresentation, with the totals for every disputed line added together into one final amount. The provider stays free to go lower afterwards — through financial assistance or a settlement offer — and you stay free to pay the billed charges in full if you want to. What neither side can do is reopen the number.
Filing it: 120 days, and what goes in the envelope
The deadline is the part that quietly ends most of these. Notice must be postmarked within 120 calendar days of receiving the initial bill carrying the excess charge — not from the day negotiations stall, and not from the final demand.
- 1
Put the estimate and the bill side by side
Both are required to file, and readable copies or photographs are accepted. If you do not hold the estimate, request it — it is retrievable from your record for six years.
- 2
Measure the gap provider by provider
Compare each billing party's total against that same party's expected charges. At least $400 for that party is what makes the item eligible.
- 3
Date the initial bill
The 120-day window runs from receipt of the first bill containing the excess charge. Log that date the day it arrives rather than reconstructing it later.
- 4
Submit the initiation notice
Through the federal IDR portal, electronically or on paper. It identifies the item and date of service, encloses the bill and the estimate, names the state, adds provider contact details if the estimate lacks them, and states how you want to be contacted.
- 5
Pay the administrative fee
A fee set by HHS through guidance goes to the dispute resolution entity at initiation. Check the current amount before filing; it is deliberately kept low so it is not a barrier.
- 6
Answer an insufficiency notice within 21 days
If the entity finds the notice incomplete or the item ineligible, 21 calendar days are given to supply what is missing — 35 where an accessible-format request went unmet.
Log the 120-day window the day the bill arrives
Every other deadline here is measured in business days and belongs to the provider. This one is yours, it runs on calendar days, and it starts from a piece of post that is easy to put in a drawer.
Once the process is running, three protections attach at once. The provider must not move the disputed bill into collection or threaten to, and must stop collection efforts already under way. It must suspend the accrual of late fees. And it must not take or threaten retributive action for your having filed. If a collection agency has already been in touch, what debt collectors can and cannot do covers the parallel set of rules that apply to them.
If no estimate was ever given
Say this plainly, because it is the disappointing answer: dispute resolution runs against a figure, and with no estimate there is no figure. Eligibility is defined by billed charges exceeding the expected charges on a good faith estimate, and a copy of it is a required part of the initiation notice. No estimate, no dispute — however clear the failure.
What is left is an enforcement complaint rather than a payment remedy. Failing to furnish a required estimate breaches the provider's own obligation, and complaints go to the federal No Surprises Help Desk on 1-800-985-3059 or through the CMS medical bill rights pages. Ask first whether an estimate was issued — a document may exist that you never saw, and that reopens the whole route.
One narrow exception is worth knowing. A provider that makes an honest error in an estimate does not fail its obligation if it corrects the estimate as soon as practicable — but where the care was delivered before the correction, the regulation preserves the dispute route anyway.
Insured patients do not have this route yet
The statute also built a mirror image for people using their coverage: the provider sends the estimate to the plan, and the plan sends back an advanced explanation of benefits showing network status, the contracted rate and what your share would be. Neither half is being enforced. The Departments deferred enforcement of the advanced explanation of benefits pending rulemaking on how the data should move between providers and plans, and HHS separately deferred enforcement of the requirement that providers send estimates to plans at all.
HHS gave its reasoning openly: insured consumers already have recourse through internal claims and appeals and external review, and so are not in the position an uninsured patient would be in with no process at all. That is a real answer, but it is a different mechanism with different deadlines. If you are insured and the bill is wrong, the appeal sits with the plan, not with a dispute entity.
Dispute resolution does not replace the ordinary routes
It is a determination of what you must pay, layered on top of everything else you could have done anyway — and the ladder below is roughly the order of cost.
What to do about the bill, cheapest first
- One request
Ask for the estimate on file
Retrievable from your record for six years. Without it you cannot file — and with it, most billing offices recheck the coding themselves.
- A letter
Challenge the line in writing
Name the item, the estimated figure, the billed figure and the difference. The dated letter is the record later steps rest on.
- An application
Ask about financial assistance
Charity care and payment plans run separately and are not replaced by a determination.
- An administrative fee
Patient-provider dispute resolution
Postmarked within 120 days of the initial bill. Collections pause, late fees stop, the determination binds.
Where a state runs its own process that HHS has found to meet or exceed the federal minimums, disputes from that state are directed there instead — and its fee cannot exceed the federal one.
A demand letter is the usual instrument for the second rung: one number, one date, one thing you want. If the real complaint is that nobody told you what was going to happen at all, that is a consent question rather than a pricing one, and belongs with informed consent.
The document that decides this is written before the treatment
Every remedy above is measured against a page produced days before anyone touched you. That is the unusual thing about this scheme. The dispute entity is not asked what the care was worth; it is asked what the provider said it would cost, and whether anything unforeseeable happened in between. A patient with a detailed estimate has a strong position and a patient with none has almost nothing, and the difference between them is one phone call made at the point of booking.
So the operative act is not the dispute. It is asking, in the same conversation where you say you will be paying cash, for the written estimate — and reading it against the registration paperwork you are handed later to check that the answer about insurance never quietly changed.
Sources
- 45 CFR § 149.610 — good faith estimates for uninsured (or self-pay) individuals (eCFR)
- 45 CFR § 149.620 — the patient-provider dispute resolution process (eCFR)
- 45 CFR § 149.620 — Cornell LII
- CMS — providers: payment resolution with patients
- CMS — medical bill rights, and the No Surprises Help Desk
- FAQs Part 49 — deferred enforcement of the advanced explanation of benefits
- FAQs Part 60 — enforcement discretion on co-provider estimate information
General information, not legal advice. This guide explains how these documents and rules generally work. Law varies by jurisdiction and changes, and none of it is applied to your circumstances here. For anything consequential, consult a licensed attorney where you are.
Frequently asked
My bill is $600 over the estimate in total. Can I dispute it?
Only if at least $400 of that excess is attributable to a single provider or facility measured against that same party's expected charges on the estimate. The threshold is applied per billing party, not to the episode as a whole, so a bill that is $600 over in aggregate may split into two ineligible gaps. Compare each provider's line separately before you file.
How long do I have to start the dispute?
The initiation notice must be postmarked within 120 calendar days of receiving the initial bill that contains the charge substantially in excess of the estimate. The window runs from that first bill, not from a later statement, a collections letter or the point at which discussions with the billing office break down. Record the date the first bill arrives.
What happens if I never received a good faith estimate?
You cannot use patient-provider dispute resolution, because eligibility is measured against the expected charges on an estimate and a copy of it is required with the initiation notice. Ask first whether one was issued — providers must produce any estimate from the last six years. Otherwise the route is a complaint to the federal No Surprises Help Desk about the failure to furnish it.
Can the provider send my bill to collections while the dispute runs?
No. While the process is pending the provider must not move the disputed bill into collection or threaten to do so, and must cease collection efforts already under way. It must also suspend the accrual of late fees on the unpaid amount, and it must not take or threaten retributive action against you for having used the process at all.
Does the dispute process stop me negotiating or applying for charity care?
No. Negotiation continues during the process, and if you agree a figure before the determination the provider must reduce it by at least half the administrative fee. Financial assistance is a separate track that survives the determination — a provider is expressly free to offer a lower amount than the entity decided, and you remain free to accept it.