Surprise Billing & the No Surprises Act: Your Rights

Before January 1, 2022, one of the ugliest patterns in American healthcare was routine: you'd go to an in-networkIn-NetworkIn-network means a provider or facility has a written contract with your health plan's network. That contract locks in a negotiated rate, requires the provider to accept the allowed amount as payment in full, and prohibi… Read the full definition → hospital, have surgery with your in-network surgeon, and weeks later get a bill for $6,400 from an out-of-networkOut-of-NetworkOut-of-network means a provider has no contract with your health plan. The plan will typically pay something toward the bill (usually at a lower allowed amount and higher coinsuranceCoinsuranceCoinsurance is the percentage of the allowed amount you pay after your deductibleDeductibleA deductible is the dollar amount you pay out of pocket for covered services each plan year before your health plan starts sharing the cost. If your deductible is $3,000, you pay the first $3,000 of allowed charges yours… Read the full definition → is met, up until you hit your out-of-pocket maximum. If your plan is "80/20 after deductible," the plan pays 80% and you pay 20% of every … Read the full definition →), and the provider is generally free … Read the full definition → anesthesiologist you never chose, never met, and had no way to avoid. It was called balance billing, and it happened millions of times a year.

The No Surprises ActNo Surprises ActThe No Surprises Act is federal legislation that took effect January 2022 to protect patients from balance billing in emergency situations and at in-network facilities. If you go to an in-network hospital for surgery and… Read the full definition → (NSA), effective January 1, 2022, largely ended this practice. But the rules are technical, the exceptions matter, and enforcement is still evolving. Here's what you actually need to know.

1. What Surprise Billing Is

Surprise billingBalance BillingBalance billing is when a provider bills you for the difference between what they charged and what your plan allowed. If the hospital billed $6,000, the plan allowed $2,000 and paid $1,600, an out-of-network provider mig… Read the full definition → occurs when you receive care from an out-of-network provider in circumstances you couldn't control:

• Emergency care at any facility
• Non-emergency care at an in-network facility, provided by an out-of-network provider (anesthesiologist, radiologist, pathologist, assistant surgeon, ER physician)
• Air ambulance transport

The OON provider historically billed at their own rates (often chargemasterChargemasterA chargemaster is the master price list a hospital keeps for every single item and service it can bill for — from a Tylenol tablet to a heart valve replacement. It's the sticker price, not the price anyone actually pays.… Read the full definition → or close to it), the insurer paid a small "in-network equivalent" amount, and the balance was billed to the patient. Balance bills of $2,000-$20,000 were common for a single procedure.

2. What the No Surprises Act Actually Prohibits

Under the NSA, providers cannot balance bill patients for:

1. Emergency services. Any care received in an ER or urgent care setting for what a "prudent layperson" would consider an emergency, regardless of network status.
2. Non-emergency services at in-network facilities when provided by an OON provider — unless the patient gave explicit written consent to receive OON care and understood the cost implications.
3. Air ambulance transport — regardless of network status.

For these categories, the patient's cost-sharing is limited to what they would have paid at an in-network provider. The provider and insurer must work out the actual payment amount between them, through an Independent Dispute Resolution (IDR) process, without involving the patient.

3. What the No Surprises Act Does NOT Cover

Several categories remain outside NSA protection:

• Ground ambulance. Notoriously excluded from the original NSA. Legislation to add ground ambulance has been pending for years but has not passed as of 2026. Ground ambulance balance bills remain a major problem in many states.
• Voluntary out-of-network care. If you choose to go OON and sign a written consent form waiving NSA protections (typically presented by the provider at least 72 hours before the service), you're on your own for the balance bill.
• Uninsured patients. The NSA's balance-billing protections are structured around insured patients. Uninsured patients are covered by a different NSA provision — the Good Faith EstimateGood Faith EstimateA Good Faith Estimate is a written cost estimate that providers are required to give uninsured and self-pay patients before scheduled care under the No Surprises Act. It must include all expected charges — facility, prof… Read the full definition → (GFE) requirement, see below.
• Care outside the U.S. Medical tourismMedical TourismMedical tourism is the practice of traveling — domestically or internationally — to receive planned medical care at a significantly lower price than the care would cost locally, often with equivalent or better quality ou… Read the full definition → is not covered.

4. Good Faith Estimate (GFE) Requirement

For uninsured or self-pay patients, providers must furnish a Good Faith Estimate of expected charges before any scheduled service. Timing:

• If service is scheduled 10+ business days out: GFE required within 3 business days of scheduling.
• If service is scheduled 3-9 business days out: GFE required within 1 business day.
• On patient request at any time: GFE required within 3 business days.

The GFE must include: expected charges from the primary provider AND all other providers reasonably expected to provide services (anesthesia, pathology, radiology, etc.). If the actual bill comes in $400 or more above the GFE, the patient can initiate a Patient-Provider Dispute Resolution process.

For insured patients, a parallel Advanced Explanation of BenefitsEOB (Explanation of Benefits)An EOB is the statement your health plan sends after a claim is processed. It shows what the provider billed, what the plan allowed, what the plan paid, and what you owe. It is not a bill. It's the plan's accounting reco… Read the full definition →Advanced EOBAn Advanced EOB is a predictive Explanation of Benefits that health plans are supposed to send to insured members before scheduled care, showing the expected charges, the plan's expected payment, and the estimated patien… Read the full definition → (AEOB) requirement exists but has been delayed in implementation. Full enforcement is expected during the 2026-2027 regulatory cycle.

5. Independent Dispute Resolution (IDR)

When an OON provider and insurer can't agree on payment for a covered NSA service, they go to Independent Dispute ResolutionIDR (Independent Dispute Resolution)Independent Dispute Resolution (IDR) is the federal arbitration process created by the No Surprises Act to resolve payment disputes between out-of-network providers and health plans for services covered under the surpris… Read the full definition →. IDR is a baseball-style arbitration: each party submits a payment offer, and the arbitrator picks one or the other — no splitting the difference.

The patient is not involved. This is the critical design feature of the NSA: the patient's exposure is capped at in-network cost-sharing, and the provider and insurer sort out the rest between themselves.

Provider groups have challenged IDR rules in court multiple times, arguing the arbitration favors insurers. CMS has revised IDR guidance repeatedly in response. As of 2026, the process is operational but slower than intended (median resolution is still 4-6 months).

6. What to Do If You Get a Surprise Bill

If you receive a bill you believe violates the NSA:

1. Do not pay. Do not treat it as a valid obligation until investigated.
2. Call your insurer. Reference the NSA and ask whether the claim was processed correctly. If the insurer applied OON cost-sharing to a claim that should have been in-network under NSA, they can and should reprocess.
3. Call the provider's billing office. Say: "This bill appears to violate the No Surprises Act. Please rebill me at the in-network cost-sharing rate my insurer would apply."
4. File a federal complaint. The CMS No Surprises Help Desk (1-800-985-3059) accepts patient complaints and investigates. You can also file online at cms.gov/nosurprises.
5. File a state complaint. Your state insurance commissioner also has jurisdiction over most NSA violations.

7. State Protections That Go Beyond Federal Law

Several states have surprise-billing protections that are more expansive than the federal NSA:

• California. AB-72 (effective 2017) prohibits balance billing for OON providers at in-network facilities. Also caps ground ambulance billing at limited amounts in some circumstances.
• New York. The state's Emergency Medical Services and Surprise Bills Act (2015) predates the federal NSA and covers a broader set of surprise billing situations.
• Texas. SB-1264 (effective 2020) covers ground ambulance in some counties and adds an accelerated arbitration process.
• Colorado, Connecticut, Florida, Illinois, Maryland, New Hampshire, New Jersey, Washington — each has additional state-level surprise- billing protections layered on top of the federal NSA.

For care in these states, both federal and state protections may apply. The state law generally provides broader coverage; the federal law provides uniform procedural rights.

8. The "Consent to Waive" Exception

The one significant NSA loophole: if you voluntarily choose an OON provider for non-emergency care, you can sign a written consent form waiving NSA protections. This consent must be provided at least 72 hours in advance of the service and must include a good-faith cost estimate.

Do not sign these forms without careful review. The consent should include:

• A specific dollar estimate of what you'll owe if you waive protections
• Clear disclosure that you have the right to seek in-network care instead
• Names of in-network alternatives at the facility

If any of those are missing, or if the estimate is vague ("charges will apply"), the consent is likely unenforceable. Do not sign, and demand in-network care or an in-network referral.

9. Ground Ambulance — The Big Remaining Gap

Ground ambulance bills remain a serious problem. A single ambulance ride routinely bills $1,500-$4,500, and most ambulance providers are not in-network with any insurer. Patient balance bills of $1,000-$3,000 are common.

Some states cap ambulance charges. Some cities operate municipal ambulance services with fixed fee schedules. Some insurers cover ambulance at in-network rates regardless of network status (check your SPDSummary Plan Description (SPD)The Summary Plan Description (SPD) is the ERISA-required document that spells out the full terms of an employer-sponsored health plan in accessible language — what's covered, what's excluded, how claims are filed, who th… Read the full definition →). But there is no federal protection as of 2026.

If you receive a large ambulance bill:

1. Check your state law — ~15 states have some level of ambulance protection.
2. Call your insurer and ask whether the claim was processed at the in-network rate.
3. Negotiate directly with the ambulance provider — most are willing to discount 20-40% for prompt payment.
4. If it's a municipal ambulance and you're a resident, you may qualify for financial hardship reduction.

10. Real Examples of NSA Protection in Action

Some illustrative case types:

• ER visit at in-network hospital, OON ER physician. Before NSA: patient billed $2,400 from OON physician. After NSA: patient pays only in-network cost-sharing (typically $250-$500 depending on plan). The physician and insurer negotiate the difference through IDR.
• Scheduled surgery at in-network hospital, OON anesthesiologist. Before NSA: patient billed $6,400 by anesthesiologist. After NSA: patient pays in-network cost-sharing on the anesthesia claim. Facility must have disclosed non-participating providers in advance or the balance-billing protection applies.
• Air ambulance transport for stroke. Before NSA: patient billed $52,000 (typical air ambulance charge). After NSA: patient pays in-network cost-sharing, transport bills insurer.
• Radiology reads from in-network hospital's contracted OON radiology group. Very common historically. NSA applies — patient pays in-network cost-sharing.

11. What About Providers That Aren't Contracted With Any Insurance?

Some providers — often specialists in high-demand fields (dermatology, psychiatry, some surgical specialties) — operate cash-only and don't participate in any network. If you voluntarily choose one of these providers, NSA protections don't apply.

You can still often submit a superbillSuperbillA superbill is an itemized receipt from a provider that a patient can submit to their insurance plan themselves for out-of-network reimbursement. It includes the date of service, the provider's NPI and tax ID, the CPTCPT CodeCPT stands for Current Procedural Terminology. It's the five-digit code system, maintained by the American Medical Association, that identifies every medical procedure and service billable to insurance. Every line on a m… Read the full definition → co… Read the full definition → (itemized receipt) to your insurer for OON reimbursement, which may partially cover the cost. The provider bills you full charges; your insurer reimburses at your OON benefit rate (often 50-70% of the "usual and customaryUsual and CustomaryUsual and Customary (sometimes UCR — Usual, Customary, and Reasonable) is a methodology some health plans use to set the allowed amountAllowed AmountThe allowed amount is the maximum dollar figure your health plan will recognize for a covered service. It's the number the plan uses to calculate what it pays and what you owe. Anything the provider bills above the allow… Read the full definition → for out-of-network services when there's no negotiated contract. The plan looks at w… Read the full definition →" amount, which the insurer calculates). Your net cost depends on the gap.

12. The Broker's Bottom Line

The No Surprises Act was a genuine improvement — millions of patients avoid balance bills every year because of it. But it's not comprehensive, and it doesn't operate automatically. If you receive care in circumstances that should be NSA-protected, you may still get an incorrect bill, and it's your responsibility to catch it and demand correction.

Three habits:

1. Never sign a "consent to waive NSA protections" form without understanding the exact dollar exposure.
2. For any scheduled procedure, ask "will all providers involved be in-network?" and get the answer in writing (email, portal message).
3. For every bill you receive after an in-network procedure, verify against your EOB that the plan applied in-network cost-sharing. If not, call your insurer and cite the NSA.