Surgery sits on both sides of the No Surprises Act’s consent rule. The operating surgeon is not an “ancillary service,” so for a scheduled case at an in-network facility a patient can, in principle, consent to out-of-network billing. The assistant surgeon is ancillary, so their claim is protected no matter what the patient signed. Add emergency and on-call cases, and one operation can produce claims that follow three different sets of rules.
This guide covers when surgical claims are protected, then what makes surgical disputes different in independent dispute resolution (IDR).
Is this claim protected?
| Situation | Protected? | Can the patient waive it? |
|---|---|---|
| Emergency or on-call surgery for a patient who came through the ED | Yes — emergency services | No |
| Surgery after the patient is stabilized, during the same admission | Yes, until notice-and-consent conditions are met | Only if every condition is met |
| Scheduled surgery by an out-of-network surgeon at an in-network hospital, HOPD or ASC | Yes | Yes, with valid notice and consent |
| Assistant surgeon, PA or NP assisting at an in-network facility | Yes | No — ancillary service |
| Procedure in the surgeon’s own office | Generally no | — |
| Scheduled surgery at an out-of-network hospital or ASC | Generally no | — |
HOPD means hospital outpatient department; ASC means ambulatory surgical center. State law can extend protections further for state-regulated plans. See federal vs. state IDR.
Emergency and on-call surgery
Trauma, general, orthopedic, neurosurgery and other on-call surgeons see a large share of their out-of-network volume through the emergency department. Those cases are emergency services, and the patient can’t consent away their protections. The plan must cover them at in-network cost-sharing, the patient can’t be balance billed, and the payment dispute goes to open negotiation and IDR.
Care after the patient is stabilized — a scheduled return to the OR during the same admission, for example — is post-stabilization care. It stays protected unless every one of these conditions is met: the treating provider determines the patient can travel, using nonmedical or nonemergency medical transportation, to an available in-network provider or facility within a reasonable travel distance; the patient is in a condition to receive the notice and give informed consent; and valid notice and consent are obtained. If the facility is in network, that notice must also list the in-network providers there who could furnish the care. In practice, consent is rarely workable for an inpatient surgical admission, so treat these claims as protected.
The consent exception for scheduled surgery
For an elective case at an in-network facility, an out-of-network surgeon may ask the patient to waive their protections. The waiver holds only if it meets the federal requirements, including:
- the HHS standard notice and consent documents, unmodified except where bracketed,
- a good-faith estimate of the surgeon’s charges,
- a statement that consent is optional and the patient can instead choose an available in-network provider,
- delivery at least 72 hours before the procedure — or, if it was scheduled within 72 hours, on the day it’s scheduled and at least 3 hours before the surgery, and
- the facility keeping the signed documents for at least 7 years.
Consent can’t be used if no in-network surgeon at the facility can perform the procedure, or for care arising from unforeseen, urgent medical needs.
A defective consent moves the claim into IDR. If any element is missing, the protections apply, the patient can’t be balance billed, and the practice’s route to more money is open negotiation and IDR — with its deadlines. Our compliance consulting covers the consent workflow.
Assistant surgeons and co-surgeons
Assistant surgeons are named among the ancillary services that can’t use the consent exception, and the rule applies whether a physician or a non-physician practitioner assists. So even when the operating surgeon has a valid consent, an out-of-network assistant on the same case is protected.
Each surgeon’s claim is its own dispute:
- Assistant at surgery (modifiers 80, 81, 82 and AS) — protected at in-network facilities; often paid as a reduced percentage of the primary procedure under plan policies.
- Co-surgeons (modifier 62) — each surgeon bills and disputes their own share.
- Surgical teams (modifier 66) — often priced by report, which makes the QPA worth scrutinizing.
How modifiers shape the QPA
Surgical claims carry more payment-affecting modifiers than almost any other specialty. Where a plan’s contracted rates vary by modifier, the plan must calculate a separate median contracted rate for each code and modifier combination. That gives you specific things to check:
- Assistant-at-surgery lines — is the QPA the assistant-modifier median, or the primary surgeon’s rate with a percentage applied afterwards?
- Multiple procedures (modifier 51) — was the reduction applied once, or applied on top of a QPA that already reflects it?
- Bilateral procedures (modifier 50) — was the line paid as one side?
- Co-surgery (modifier 62) — does the QPA reflect a split rate or a full one?
Read more on what the QPA is and how it’s built.
Rate disputes vs. processing errors
Sort each underpayment before acting. IDR decides the right payment for a covered, protected service. It doesn’t fix coding or claim-processing errors.
| Cause | Where to fix it |
|---|---|
| Allowed amount at or near the plan’s median rate | Open negotiation, then IDR |
| Multiple-procedure reduction applied twice, or to the wrong line | Plan appeal or corrected claim |
| Add-on or secondary codes bundled into the primary procedure | Plan appeal, with documentation |
| Post-op visit denied as part of the global surgical package | Usually correct — check the global period first |
| Prior authorization or medical necessity denial | Plan appeal, not IDR |
| Claim processed as if the facility were out of network | Confirm facility status, then dispute |
More in how to handle out-of-network underpayments.
Building the IDR offer
Surgery has strong evidence for the factors the IDR entity must weigh alongside the QPA:
- Case complexity — the procedure, operative time, intraoperative findings and any unusual circumstances (modifier 22).
- Patient acuity — trauma, comorbidities and emergency presentation.
- Training and experience — fellowship training, board certification and subspecialty expertise.
- Market share and contracting history — including any good-faith attempts to contract with the payer.
The operative report is usually the strongest single exhibit. The IDR entity may not consider billed charges or Medicare rates, so offers built on either won’t carry weight.
Timing
Surgical claims are high-value and lower-volume than anesthesia or radiology, so each one is worth disputing individually — and each missed deadline costs more. Open negotiation must start within 30 business days of the initial payment or denial. Track every surgical remit against the federal IDR timeline.
This guide is general information, not legal advice. Confirm current requirements at cms.gov/nosurprises.