Short answer. It depends on the service. Under the No Surprises Act, balance billing is prohibited for emergency services, for post-stabilization care in most circumstances, and for out-of-network care delivered at in-network facilities. It remains legal in situations the Act does not cover — including most non-emergency out-of-network care the patient chose knowingly, and ground ambulance services, which the federal law does not protect.
Where it is prohibited
- Emergency services at any facility, in or out of network, including air ambulance.
- Post-stabilization services at an out-of-network facility, unless specific notice and consent conditions are met and the patient is able to travel by ordinary means.
- Out-of-network services at an in-network facility — the classic surprise bill, where the patient chose the hospital but not the individual clinician.
In each case the patient owes only in-network cost sharing. The remaining payment question moves to the provider and the plan, which is what the IDR process exists to resolve.
Where it is still permitted
- Non-emergency out-of-network care the patient sought out knowingly at an out-of-network facility.
- Services from providers who properly completed the notice-and-consent process where it is available.
- Ground ambulance transport, which the federal Act does not cover. A number of states have their own rules here.
- Services outside the Act's scope entirely, including some categories of plan and some non-covered items.
The consent trap. Notice and consent is not a general escape hatch. It cannot be used for emergency services, and it cannot be used for ancillary services — anesthesiology, radiology, pathology, neonatology, assistant surgeons, hospitalists and intensivists — at an in-network facility, no matter what the patient signs.
Why this matters on the revenue side
The prohibition is also a routing rule. If a claim is one where balance billing is barred, the patient is out of the equation and your remedy runs against the plan through open negotiation and IDR. If it is one where balance billing is permitted, IDR is generally not the path. Getting that classification wrong on either side is expensive: filing ineligible disputes burns fees, and treating an eligible claim as patient responsibility risks an actual violation.
State law sits on top
22 states have their own surprise-billing protections and 21 use some form of bifurcation, meaning identical claims can route to a state process or the federal one depending on plan type. State rules can be broader than the federal floor. A group operating in several states will have claims going three different directions.
Enforcement
States are the primary enforcers, with federal enforcement as a backstop where a state does not or cannot act. Civil monetary penalties of up to $10,000 per violation have been associated with the federal provisions. Amounts and enforcement posture change; verify current figures and your state's rules before relying on them.
Not legal advice. IDR Filings is a dispute-filing and revenue-recovery service, not a law firm. This page is general information about how the federal process works. It is not legal advice and does not create an attorney-client relationship. For advice on your specific situation, consult a licensed healthcare attorney in your state.