Hospital-Based Groups Are at the Center of the Surprise Billing Dispute System — Whether They Wanted to Be or Not
Hospital-based physician groups ended up structurally exposed to the No Surprises Act in a way almost no other provider type did. Anesthesiologists, emergency physicians, and radiologists routinely treat patients who chose the hospital, not the physician — which is precisely the scenario the law was written to address. The result is visible in the federal Independent Dispute Resolution data: 1,243,621 disputes involving emergency and non-emergency services were initiated through the federal IDR process between January 2023 and June 2024, and nearly two in three disputed services involved care furnished in an emergency room (Peterson-KFF Health System Tracker, analyzing CMS IDR reports).
The dispute volume is concentrated in exactly these specialties
Emergency department services, radiology, and anesthesia account for the bulk of federal IDR activity. That isn't a reflection of how these groups bill — it's a reflection of where out-of-network situations structurally arise in American healthcare delivery. A hospitalist group or anesthesia group can run a completely disciplined billing operation and still find itself in the dispute system at volume, simply because of the setting it practices in.
Providers initiate most disputes and win most of them — but that's an operational cost, not free money
Across the period studied, providers and facilities initiated 90% of disputes and prevailed 80% of the time, with the provider win rate climbing from 68% in early 2023 to 85% by early 2024 (Peterson-KFF Health System Tracker). A high win rate is genuinely good news for hospital-based groups. But every one of those wins required someone to identify the dispute as worth initiating, assemble the supporting information, meet the deadlines, and pay the administrative fee — and 43% of disputes had reached a payment determination at all, with 41% still outstanding. Cash tied up in an adjudication queue is cash the group can't use, no matter how favorable the eventual ruling.
Meanwhile the underlying coordination risk hasn't gone anywhere
The IDR exposure sits on top of the coordination problem hospital-based groups already had: professional fee billing running in parallel with the facility's technical billing. Billing a global fee when the facility has already billed the technical component isn't just a revenue error — it's compliance exposure. Modifier 26 discipline, and knowing precisely where the professional/technical boundary falls for each service and each facility arrangement, remains foundational regardless of what's happening in the dispute system.
Thin per-case margins mean process efficiency compounds
Anesthesia and hospitalist billing in particular run on high case volume with modest margin per case. At that structure, a small inefficiency — a percentage point of clean-claim rate, a few days of avoidable AR, a dispute-eligible claim that nobody flagged in time — compounds into meaningful money across a year's case volume. The same inefficiency at a low-volume, high-dollar practice would be an annoyance; here it's material.
What this adds up to
For hospital-based groups, billing operations aren't a back-office function that can be run on autopilot. Between IDR participation, professional/facility coordination, rotating-roster credentialing across multiple facilities, and high-volume case-based processing, the billing operation is closer to a strategic capability — and it needs to be staffed and measured like one.
See how we approach billing and RCM for hospital-based physician groups in anesthesia, hospitalist, emergency, and radiology settings.
Industry statistics cited above are drawn from the Peterson-KFF Health System Tracker's analysis of CMS federal IDR reports as noted and are not medbpo360's own client data.