Written by a parent, not a doctor. Nothing here is medical advice.

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Federal, exists in every state

Check an unexpected out-of-network bill

Federal surprise-billing protection: at an in-network hospital, doctors you did not choose (anesthesia, radiology, pathology) can only bill your in-network share.

What it is

Federal surprise-billing protection: at an in-network hospital, doctors you did not choose (anesthesia, radiology, pathology) can only bill your in-network share.

An in-network hospital often uses out-of-network anesthesiologists, radiologists or pathologists. For those, for emergency care and for covered air ambulances, the federal rule limits you to your in-network share, whether the work plan is insured or self-funded. Ground ambulances are generally outside the federal rule. A notice-and-consent form can waive some protections, but not for those hospital-based services.

Rules
  • Protected: emergency care, covered air-ambulance services, and out-of-network clinicians at in-network facilities for services you could not reasonably choose.
  • Compare the itemized bill with the insurer’s explanation of benefits and identify the service and provider.
  • Uninsured or self-pay care has a separate good-faith-estimate and dispute process.
  • Federal surprise-billing rules generally exclude ground ambulances, but that does not settle every Maryland bill. Maryland's HMO law separately limits billing for covered services the HMO owes, while allowing applicable copays and coinsurance. The plan and Maryland Insurance Administration must check the ambulance operator, service, contract and applicable state or local rules before confirming what the family owes. State insurance protections do not automatically bind private self-funded employer plans.
What you get
  • A cap at your in-network share for protected services.
  • A dispute route through the federal medical-bill-rights process.
What it is not
  • Not protection for every out-of-network choice; whether a waiver was valid depends on the statutory conditions, not on who picked the clinician.
If you decide to apply
  1. Ask the insurer and the billing office whether the No Surprises Act applies to the specific bill.
  2. Do not sign a notice-and-consent form for anesthesia, radiology or pathology at an in-network hospital.
  3. If the bill stands, use the federal complaint route.

CMS: medical bill rights · Official page ↗

Records
  • Keep the bill, the explanation of benefits and any form you were asked to sign.
Good to know

Medicaid has separate billing protections. The hospital billing office can identify which rules apply to the bill.

Other details
  • After a qualifying network termination, a continuing-care patient can keep in-network terms for up to 90 days after the required notice; this binds self-funded plans too.

Related Maryland card: Hospital debt protections.

Official sources
Ask your social worker

“If we get a bill from a doctor we did not choose at the hospital, who checks whether the surprise-billing rule applies?”

Why I’m asking: We want to know a valid charge from one the provider cannot collect.

More background and detailed requirements
Additional program information and published rules

Who does what

The three parts, side by side. The agency decides; nobody on this page does.

You

Match each bill to the explanation of benefits and send the provider the plan's corrected amount.

Your social worker

Points you to the hospital billing office and confirms which providers at the hospital are out of network.

The care team

Records and letters when the application asks for them.

Who decides
The plan and the provider under federal law, with CMS enforcing
Ask the billing office
“This out-of-network doctor treated my child at an in-network hospital. Can you review the bill under the No Surprises Act and send a corrected bill showing our in-network share?”

How to apply

First step: Call the plan about unexpected bills from doctors outside its network at a covered hospital; name the No Surprises Act. With no plan, ask for the good-faith estimate in writing before scheduled care. If billing continues, complain at cms.gov/medical-bill-rights.

  1. Match the bill to the explanation of benefits.
  2. Do not pay the disputed balance before review.
  3. File the federal complaint if the provider keeps billing.

Where it starts: Plan correction. Federal complaint

What to gather

  • The bill and the matching explanation of benefits
  • The hospital's network status on the date of service
  • The good-faith estimate, if you have no plan
  • Any notice-and-consent form you were asked to sign

How long: Ask the plan for the corrected explanation of benefits. The federal complaint line follows up with the provider.

What a yes looks like

A corrected bill showing only your in-network cost-sharing, or a dispute decision at or near the estimate.

What a no looks like, and the next move

The provider keeps billing: file the federal complaint and send the provider the complaint number.

Watch out

  • It does not touch your ordinary in-network deductible and copays.
  • It does not apply when the doctor takes Medicaid (a participating provider cannot balance-bill at all), or to a service you knowingly chose out of network.
  • Do not pay a disputed balance while the review is open.
  • Never sign the notice-and-consent waiver at admission. Anesthesia, radiology, pathology, lab, hospitalists and intensivists cannot use it by law; for any other out-of-network doctor, signing gives up the protection.
  • Uninsured or paying yourself: ask for the good-faith estimate before scheduled care. Start a dispute within 120 days of the bill (count from the bill's date to be safe) if it is $400 or more over the estimate; the fee is $25.
  • For an uninsured or self-pay estimate, separately ask anesthesia and other providers for their estimates. CMS is still not enforcing inclusion of all separate providers in one combined estimate; that is an enforcement policy, not repeal of the requirement.
  • Major-medical government and church plans are also subject to No Surprises Act protections. A general grandfathered-plan exception does not erase its expanded external-review rights.

The numbers and the rules

The arcane layer, kept on purpose. Checked September 10, 2026.

What it is worth

The balance bill from a doctor you did not choose, wiped. A written estimate and a $25 dispute route if uninsured. Up to 90 days of continued care when a doctor leaves the network.

  • $400 (at least) — Bill over the good-faith estimate that opens a dispute (uninsured or self-pay)
  • $25 — Dispute filing fee
  • $120 (from receiving the bill; count from the bill's date to be safe) — Days after the bill to start the dispute
  • $90 (up to) — Continued care on the old terms after a doctor leaves the network
  • $3 (care scheduled at least this far ahead, or an estimate you ask for before scheduling) — Notice for a scheduled-care estimate

Legal protection: In-network cost-sharing for emergency and in-network-facility services from out-of-network providers · Federal complaint option at cms.gov/medical-bill-rights · Uninsured or self-pay: a written good-faith estimate before scheduled care; a bill at least $400 over it can be disputed for a $25 fee within 120 days · Anesthesia, radiology, pathology, lab, neonatology, hospitalists, intensivists and assistant surgeons cannot ask you to waive the protection · Up to 90 days of continued care on the old terms when a treating doctor leaves the network; binds self-funded employer plans too

What it costs the family: Your ordinary in-network share remains.

The eligibility facts, as published

Qualifying bill
yes

Decisions this site cannot make: Whether the federal protection applies to the bill

Expect friction on: Multiple providers and bill types

The trap: Signing the notice-and-consent form at admission. It gives up the protection for care you chose out of network. The law does not let anesthesia, radiology, pathology, lab, hospitalist or intensivist services be waived at all.

What changes by state: Federal surprise-bill protections apply everywhere. Some states add protections for plans where an insurer carries the risk.

Where I read this

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