A bill from a clinician you never chose: the No Surprises Act decision tree for insured patients

Four facts to pin down before reading the rule

The rule's answers depend on facts that sit on the bill and the plan's papers, so collect them first. Who is the bill from, and what is the service on each line? Was the facility, meaning the hospital, the hospital outpatient department or the ambulatory surgical center, in your plan's network on the date of service? Was the visit an emergency department visit? And did you sign a form with the words notice and consent in it, and if so, when?

The federal protections apply to most types of health insurance, per CMS, which the CMS page does not enumerate. Medicare and Medicaid are separate programs with their own rules and are not the subject of this page. The rule defines a participating facility as one with a contract with the plan, directly or indirectly, and a single case agreement between a facility and a plan counts as a contract for this purpose. A provider is nonparticipating if there is no such contract for the item or service. The explanation of benefits shows how the plan treated each provider on the claim.

The decision tree

Question	If yes	If no
1. Was this care at a hospital emergency department or an independent freestanding emergency department?	Protected. A nonparticipating facility or provider may not bill more than your in-network cost sharing for the emergency services (45 CFR 149.410(a)). Go to question 2 only for services after you were stabilized.	Go to question 3.
2. Did the clinician or facility treat you after you were stabilized, out of network?	Still protected unless all conditions for the notice and consent exception are met, including that your treating clinician determined you could travel to an available in-network provider. Unforeseen urgent needs can never be consented away (149.410(b), (c)).	Go to question 3.
3. Was the care non-emergency, at a participating hospital, hospital outpatient department or surgical center, from a clinician with no contract with your plan?	Protected. The clinician may not bill more than the in-network cost sharing, unless a valid notice and consent applies (149.420(a)). Go to question 4.	If the facility itself was out of network for non-emergency care, the rule does not apply to the facility. Go to the section on where the rule stops.
4. Is the service an ancillary service: emergency medicine, anesthesiology, pathology, radiology or neonatology; assistant surgeon, hospitalist or intensivist; any diagnostic service including radiology and laboratory; or a service where no participating provider was available at that facility?	Protected, with no consent exception available (149.420(b)(1)). Whatever you signed does not change this.	Go to question 5.
5. Did the service result from unforeseen, urgent medical needs that arose at the time of service?	Protected, with no consent exception available (149.420(b)(2)).	Go to question 6.
6. Did the provider give you a compliant notice, separate from other documents, in time, and obtain your signed consent?	The provider may balance bill, and the consent form says your payment might not count toward your deductible or limit. Check each element below before accepting this.	Protected. Treat the bill as a violation of the rule.
7. Is the bill from a ground ambulance company?	Outside the federal rule. Use the ground ambulance guide.	Stay on this tree.

Questions 1 through 5 are about the service, and question 6 is about the paperwork.

The emergency branch, and its one narrow exception

For an emergency department visit, the rule is the broadest. A nonparticipating emergency facility, and a nonparticipating provider who treats you in that emergency visit, may not bill or hold you liable for more than the cost-sharing requirement for the service. The rule applies at a hospital emergency department and at an independent freestanding emergency department. The cost sharing must be calculated as it would be for a participating provider, and it counts toward your in-network deductible and out-of-pocket maximum (45 CFR 149.110, 149.410).

The exception covers what happens after you are stabilized. A nonparticipating provider or facility can ask for notice and consent for those further services, but only if every one of the conditions is met. The attending emergency physician or treating provider determines that you can travel by nonmedical or nonemergency medical transportation to an available participating provider within a reasonable travel distance. The provider satisfies the notice and consent requirements. You are in a condition to receive the information and give informed consent, as determined by the clinician. And the provider meets any additional state requirements. Even then, the exception cannot apply to unforeseen, urgent needs that arise at the time of service. The practical reading is that the exception is rare, and a bill that rests on it needs paper to back it up.

The planned-care branch: the ancillary list and the consent form

For non-emergency care at a participating facility, a nonparticipating clinician may not bill more than your in-network cost sharing unless the notice and consent exception applies. The list of services the exception can never reach is the heart of the rule, and it is short enough to read in full. The rule names items and services related to emergency medicine, anesthesiology, pathology, radiology and neonatology, whether provided by a physician or a nonphysician practitioner; items and services provided by assistant surgeons, hospitalists and intensivists; diagnostic services, including radiology and laboratory services; and items and services from a nonparticipating provider where no participating provider can furnish the item or service at that facility (45 CFR 149.420(b)(1)).

That list explains the typical surprise bill. A patient picks an in-network surgeon at an in-network hospital, and the anesthesiologist, the pathologist who reads the tissue and the radiologist who reads the image are separate groups that the patient never selected. Each is on the list, so the contract status of the group does not matter to the patient's share. The services outside the list are the ones a patient may actually choose, such as a surgeon who is out of network and gives notice and obtains consent, and for those the form has to meet specific tests.

• Separate paper. The notice must be provided physically separate from other documents and not attached to or incorporated into any other document.
• Timing. The notice is due at least 72 hours before the service when the appointment was scheduled that far ahead. If the appointment was scheduled within 72 hours, it is due on the date of scheduling, and where the notice is given the same day, no later than 3 hours before the service.
• Content. The notice must state that the provider is nonparticipating, give a good faith estimate of what the provider may charge, state that prior authorization or other care management limits may apply, and state clearly that consent is optional and that the patient may instead seek care from an available participating provider, with cost sharing no higher than in network.
• The consent. It must be voluntary, signed, on the form specified by the government, and must record the time and date of the notice and of signing. It must say the payment might not count toward the plan's deductible or out-of-pocket maximum and that the patient may be balance billed.
• Language. The patient must be offered the notice and consent in the common languages the rule specifies.
• Records. The provider must give the patient a copy, and a facility that obtains a written consent must keep it for at least seven years.

A patient presented with a form at the front desk of an operating room, on the day, with everything in one packet, has a form that does not meet the separate-paper test. A patient who was given a stack of intake papers that included an out-of-network acknowledgment has the same problem. These are tests of paper and timing, not of whether the patient wanted care, and anyone who is unsure whether a form was compliant can ask the provider for a copy of the notice and the consent, with the time stamps.

What you owe when you are protected: the recognized amount

When the rule applies, the plan must not impose cost sharing greater than it would have if a participating provider had furnished the service, and it must calculate that cost sharing as if the total amount charged were the recognized amount. In a state without its own specified law, the recognized amount is the lesser of the qualifying payment amount, which is the plan's median contracted rate for similar services as defined in the rules, and the amount the provider billed. Take invented numbers. A radiologist with no contract bills $900 for reading a scan. The plan's qualifying payment amount for that service is $400. The plan's deductible is met and its coinsurance is 20%.

Line	Protected under the rule	If the rule did not apply
Provider billed	$900.00	$900.00
Base for your cost sharing	Recognized amount: lesser of $400 and $900 = $400.00	Plan's allowed amount for out-of-network care, assumed $400.00
Your coinsurance at 20%	$80.00	$80.00
Balance bill from the provider	$0.00	$500.00
You owe	$80.00	$580.00
Counts toward your in-network limits	Yes	Depends on the plan

The difference is the $500 balance bill, which the rule prohibits. The plan pays the provider directly. It must decide on coverage and send an initial payment or a denial notice within 30 calendar days of the bill being transmitted, and then pay the amount by which the out-of-network rate exceeds your cost sharing (45 CFR 149.120(c)). If the provider and plan disagree about that rate, the dispute is between them, through negotiation or the federal dispute process, and it is not the patient's to settle. A patient whose bill still shows the full $900 after the claim has been processed has a bill that contradicts the rule.

Two operating-room bills side by side

The tree gives different answers for two clinicians in the same room, so a short pair of cases shows why. In both, the hospital is in network and the plan has a $500 deductible remaining and 20 percent coinsurance after it. The figures are invented.

Item	Anesthesia group, no contract with the plan	Surgeon, no contract, chosen by the patient after a compliant notice
Billed	$2,400	$9,000
Qualifying payment amount (plan's median contracted rate, invented)	$800	$3,500
On the ancillary list	Yes, anesthesiology	No
Notice and consent available to the provider	No (149.420(b)(1))	Yes, and it was used
Recognized amount, lesser of billed and QPA	$800	Not applicable: consent was given
Patient's cost sharing	$500 deductible plus 20% of $300 = $560.00, counted toward in-network limits	Whatever the plan's out-of-network terms and the provider's bill produce, not counted toward in-network limits as the consent form warned
Balance bill allowed	No	Yes, up to the notice's estimate and the provider's charge

The anesthesia group's bill is the one patients never saw coming, and the rule is at its strongest there: the $560 is the patient's total, and the $1,600 difference between the group's charge and the recognized amount is a matter between the group and the plan. The surgeon's bill is the one the patient could have declined, which is why the rule lets a signed, compliant consent change the answer. A patient who is offered such a form has a real choice: the notice must say that consent is optional and that care from an available participating provider would carry in-network cost sharing. The choice is not an obligation to sign.

The one-page notice every provider is supposed to hand you

A separate rule requires each provider and facility to tell insured patients about these protections. Section 149.430 says each provider and facility, including hospital emergency departments, must post the information on a public website if it has one, post it on a sign at its location, and give each insured patient a one-page, double-sided notice in print no smaller than 12-point type, in person, by mail or by email as the patient chooses. The notice must explain the federal prohibitions on balance billing, any state law requirements that apply, and give contact information for the state and federal agencies to contact if the patient believes the provider has violated the rule. It must be given no later than the date and time the provider requests payment, or, if no payment is requested, no later than the date it submits a claim to the plan.

That notice does two jobs for a patient with a bill in hand. It is a checklist of the protections that should have applied, written by the provider. And its absence is itself a fact: a provider that bills a patient without ever providing the notice has not met the disclosure rule, which is worth saying in a call. A provider that does not furnish items or services at a facility is excused from some disclosures, and the exceptions are listed in the section, so the point is a question to ask and not an automatic violation.

Papers to ask for, and what each one proves

Paper	Who has it	What it proves
Copy of the signed notice and consent, with the time and date of notice and of signing	The provider must give you a copy at the time (149.420(c)(3)); the facility keeps the original seven years	Whether the exception was available and whether the timing and content tests were met
The one-page notice about balance-billing protections	The provider or facility, by the date it asked for payment	Whether the disclosure rule was followed, and which agencies to contact
Explanation of benefits for the claim	The plan	How the plan classified the provider, the allowed or recognized amount, and your cost sharing
Itemized bill with codes	The provider	Which services were billed, so each can be placed on the tree
Claim number and the date the plan had the information it needed	The plan	When the 30-calendar-day clock for the plan's initial payment or denial started

With these five papers, a patient can say precisely which branch of the tree the bill is on, which rule section applies, and which party has not done what the rule requires. That precision is what turns a phone call into a corrected claim. Without them, a call is a request to be believed. The records are ordinary correspondence, and a request for them is not an accusation.

A bill arrived: what to do, in order

1. Find the explanation of benefits for the same service and date. If it shows the clinician as out of network and a patient responsibility greater than your in-network cost sharing, note the line and the code.
2. Walk the tree. Write down the answer to each question, and the rule cited next to it. If the bill falls on a protected branch, you will be able to say so in a sentence.
3. Call the plan first, and ask it to reprocess the claim under the federal rules for out-of-network services at an in-network facility, and to send you the cost-sharing amount in writing. The plan holds the contract and the deductible data.
4. Then call the billing office of the provider. Say that the service is on the federal ancillary list or is emergency care, that the plan has been asked to process the claim at in-network cost sharing, and ask the office to hold the account. Ask whether it holds a signed notice and consent and, if so, for a copy with the time stamps.
5. Pay only the in-network cost-sharing amount that the plan states, and keep the receipt. A payment you did not owe is harder to recover than a hold is to request.
6. If the billing continues, file a complaint through CMS (1-800-985-3059 or its online form) and with your state insurance department. Keep a list of calls with dates and names. The guide on checking an itemized bill shows what to attach.

One point about timing is worth making. A bill sent to collections or reported to a credit bureau while a dispute is open creates a second problem on top of the first. The guides on medical bills in collections and what happens when a hospital bill goes unpaid explain the clocks that apply, and a written hold request is the document that helps most. The related guide on why a hospital bill is high with insurance places an out-of-network bill among the other common causes.

Where the federal rule stops

Three gaps are worth naming so that a patient does not spend effort in the wrong place. The first is ground ambulance. The rule's protections for air ambulance exist, but a ground ambulance company with no contract with the plan is not covered by the federal prohibition, and the guide on the ground ambulance gap covers what remains available. The second is a non-emergency service delivered at a facility that is itself out of network, where the patient chose both the facility and the clinician. That is a plan benefit question, covered by the plan's out-of-network terms and the guide on estimating your cost with insurance. The third is coverage the federal rule does not reach, such as Medicare, which has its own limits on what providers may bill. If you are unsure which applies, the rule's scope is described in CMS's consumer pages, which say the protections cover most types of health insurance.

State law can add to the federal floor. Where a state has a specified state law, the recognized amount is set by that law rather than the qualifying payment amount, and a state may offer protections that reach settings the federal rule does not, such as some ground ambulance rides. This page does not catalog state laws, because the rules vary and change. The state insurance department's website is the place to look, and the department also takes complaints about insurers.

Balance billing with insurance: questions about the rule

Rule text and dates

45 CFR 149.410 (emergency services; notice and consent after stabilization; retention of consent), 149.420 (non-emergency services at participating facilities; ancillary services; notice and consent content and timing), 149.110 and 149.120 (coverage requirements, cost sharing, 30-day payment timing, counting toward in-network limits) and 149.30 (definitions of participating facility, nonparticipating provider and recognized amount), eCFR current text, read October 23, 2026. CMS, Understand your rights and protections against surprise medical bills (scope: most types of health insurance; emergency room visits; non-emergency care at in-network hospitals, hospital outpatient departments and ambulatory surgical centers; air ambulance; complaint line 1-800-985-3059, seven days a week, 350 or more languages), https://www.cms.gov/nosurprises/consumers/understand-your-rights-and-protections-against-surprise-medical-bills, read October 23, 2026.