The answer first: Federal IDR crossed 5.1 million cumulative disputes as of January 31, 2026, and the 2026 IDR Operations Final Rule cuts dispute fees by more than 85% while moving all filings to a centralized IDR Gateway in the second half of 2026.
Per the CMS Federal IDR reports page (cms.gov/nosurprises/policies-and-resources/reports), the arbitration pipeline that opened in 2022 has now absorbed more than 5.1 million disputes. In May 2026 alone the process saw 287,520 initiations against 283,437 closures. Cheaper filing plus a single functioning platform changes the economics of out-of-network arbitration, and it changes what auditors will expect your dispute files to look like.
From 2022 backlog machine to 2026 operations overhaul
Federal IDR opens for business
The No Surprises Act arbitration process begins accepting disputes between out-of-network providers and plans. Volume starts accumulating immediately and never slows. Everything in the 5.1 million cumulative count dates from this starting line.
Latest public data window
The Federal IDR Public Use File Supplemental Background, 2025 Q3-Q4 (cms.gov) is the most recent line-level disclosure of dispute activity. For audit teams, this file is the benchmarking baseline: it is what regulators, plans, and opposing counsel can all see about dispute patterns, party behavior, and outcome mix.
Cumulative disputes pass 5.1 million
The CMS Federal IDR reports page confirms the milestone: more than 5.1 million disputes initiated since 2022. This is no longer a niche appeals channel. It is one of the highest-volume adjudication systems in American healthcare, and its records are discoverable, auditable, and increasingly standardized.
5,100,000+ cumulative disputesIDR Operations Final Rule lands
Per the CMS fact sheet on the Federal Independent Dispute Resolution Operations Final Rule (2026), dispute fees fall by more than 85%. The single biggest economic barrier to arbitrating mid-size and small claim batches is largely removed. Disputes that were previously not worth the filing fee are now in play.
Fees down more than 85%Throughput catches intake
287,520 disputes initiated, 283,437 closed, in one month. The closure engine is finally running at nearly the same speed as the filing engine. A process once defined by backlog is becoming a process defined by deadlines, which is exactly where disciplined operators win and sloppy ones get timed out.
IDR Gateway cutover
Filings move to the centralized IDR Gateway in the second half of 2026. One platform, one intake pipeline, one system of record for your dispute history. Every workflow, template, and deadline tracker built around the old filing path needs to be rebuilt around the Gateway before the transition, not after.
Intake versus closure, one month
When closures run at nearly the pace of initiations, the process stops rewarding parties who simply wait out the queue. It starts rewarding parties whose eligibility screens, open-negotiation records, and offer packages are complete on day one. That is an audit-readiness question as much as a revenue question.
Cheaper filing changes the batching math, and the audit exposure
Small batches become viable
With fees cut by more than 85%, out-of-network arbitration pencils out for smaller claim batches that teams previously wrote off. Batching strategy should be rebuilt from the fee floor up: what you group, when you file, and which items you no longer abandon.
One Gateway, one paper trail
A centralized platform means a centralized record of everything your organization files: eligibility attestations, timelines, and offers. For audit and enforcement teams, this is a gift and a risk. Consistent, defensible filings compound. Inconsistent ones become a searchable pattern.
Deadlines are the new backlog
May 2026 shows a system closing 283,437 disputes in a month. Fast closure means short windows. Deadline-tracking has to move from spreadsheets watched by one analyst to a workflow with owners, alerts, and an escalation path that survives staff turnover.
What OON billing and compliance teams should do before the cutover
- Rebuild the batching model on the new fee floor.
Re-run the economics on every out-of-network service line using the more than 85% fee reduction from the IDR Operations Final Rule (2026). Identify the claim batches you stopped disputing purely on cost, and decide which come back into scope.
- Map every deadline in the dispute lifecycle.
Open negotiation windows, initiation windows, offer submission, and fee payment each carry their own clock. Document the full chain and assign a named owner for each clock, not a shared inbox.
- Stage your Gateway transition plan now.
Inventory every workflow, template, and tracker that references the current filing path. Anything touching intake, status checks, or document upload gets a Gateway version ready before the second half of 2026 cutover.
- Benchmark yourself against the Public Use File.
Pull the Federal IDR Public Use File Supplemental Background, 2025 Q3-Q4 (cms.gov) and compare your dispute mix and outcomes to the visible universe. If your pattern is an outlier, know why before someone else asks.
- Audit your eligibility screening before volume scales.
Cheaper filing will tempt teams to file more. Ineligible or poorly documented disputes filed at scale create exactly the pattern enforcement reviews look for. Tighten the front-end screen first, then raise volume.
- Preserve the pre-Gateway record.
Export and archive your complete dispute history from the current process, with dates and outcomes, so your institutional record does not fracture at the platform transition.
Every figure above comes from a primary federal source
- CMS Federal IDR reports page, cms.gov/nosurprises/policies-and-resources/reports: cumulative disputes over 5.1 million as of January 31, 2026; May 2026 initiations of 287,520 and closures of 283,437.
- Federal IDR Public Use File Supplemental Background, 2025 Q3-Q4, cms.gov: the latest line-level public dispute data window.
- CMS fact sheet, Federal Independent Dispute Resolution Operations Final Rule (2026): dispute fee reduction of more than 85% and the IDR Gateway transition in the second half of 2026.
Get your IDR operation Gateway-ready before the clock starts
ASP-RCM Solutions builds out-of-network dispute operations for provider organizations: eligibility screening, batching strategy tuned to the new fee structure, deadline-tracked open negotiation, and audit-defensible dispute files that hold up when the record is centralized. If your team is still running IDR from a spreadsheet, the second half of 2026 is the deadline you did not set. We can help you meet it.
Talk to our OON dispute teamRelated reading
Route the encounter first. Bill it second.
A decision-flow guide to routing behavioral health telehealth encounters to the correct place of service, modi
Read →BriefingThe 2026 IDR compliance timeline
The Federal IDR Operations Final Rule cuts the administrative fee from $115 to $15 per party for disputes init
Read →InsightThe answer first: the pledge is real, the relief mostly is not, yet
One year after the June 23, 2025 industry pledge, AHIP reports an 11% prior auth volume reduction and 6.5 mill
Read →