IDR for neuromonitoring: the IONM arbitration record
Which IONM claims qualify, why the award multiples are among the highest in the process, and how monitoring groups file at case volume.
No specialty shows the gap between payer benchmarks and arbitration awards like intraoperative neuromonitoring. CMS published 165,409 neurodiagnostics and IONM disputes for 2025, and the median award ran about 34 times the qualifying payment amount. This site explains how IONM groups use federal IDR, grounded entirely in the published record.
All 3.39 million federal IDR disputes published by CMS, 2023 through 2025. Explore the data at idrexplorer.com.
Federal IDR is the No Surprises Act arbitration process for out-of-network claims, and intraoperative neuromonitoring posts some of its strongest results. CMS published 165,409 neurodiagnostics and IONM disputes for 2025. IONM providers won 84.7 percent of decided disputes that year, the median award was about 34 times the qualifying payment amount across decided line items, among the highest multiples of any specialty, and the median decision took 31 days.
Why IONM lives in this process
The patient on the table never chooses who monitors their spinal cord. The surgeon or the facility brings in the IONM team, networks rarely contract for it, and payers price it off benchmarks the arbitration record says are far below what the work is worth. The No Surprises Act protects out-of-network IONM in surgeries at in-network hospitals and ambulatory surgery centers, and because monitoring is a diagnostic service, the law's consent waiver mechanism never applies to it. The payment disagreement goes to federal IDR, and in 2025 that forum sided with IONM providers in five of six decided disputes.
The multiples are the story
The 2025 files show 165,409 disputes with neurodiagnostics and IONM line items, an 84.7 percent win rate on decided disputes, and a median award of about 34 times the qualifying payment amount across decided line items, among the highest multiples of any specialty in the process. The code detail explains it: somatosensory evoked potentials (95938) carried a median QPA of $58 and a median decided award of $2,800. Intraoperative EEG (95955) ran $60 against $5,100. Neuromuscular junction testing (95937) ran $72 against $6,225. Arbitrators looked at monitoring QPAs and consistently concluded they do not describe the market.
Per-case stacks, not single lines
An IONM case rarely bills one code. A spine case can produce evoked potentials, EMG, EEG, and the remote supervision line (95941) on the same date. Those lines travel together into a dispute, and cases against the same payer for the same or similar services within a 30 business day window can batch into one arbitration. A monitoring company covering a busy spine program turns a month of cases per payer into a handful of well-documented disputes rather than hundreds of orphan claims.
What filing costs an IONM group
The fixed costs are small: a $15 administrative fee per party per dispute and a certified IDR entity fee of a few hundred dollars that returns to the winner. The meaningful cost is the operating work of deadlines, eligibility screens, and offer construction, and what you pay for it. Contingency vendors typically keep 15 to 25 percent of recoveries that, in this specialty, run thousands of dollars per case. Lido IDR does the same work for a flat fee per arbitration. Every number above is from the CMS public use files, explorable at idrexplorer.com.
Common questions
Can IONM companies use federal IDR?
Yes. Out-of-network neuromonitoring furnished during surgery at an in-network hospital or ambulatory surgery center qualifies, as does monitoring in emergency surgery. IONM is a diagnostic service, so patient consent waivers never remove protection. Medicare and Medicaid cases are outside the process.
What do IONM providers win in federal IDR?
In the 2025 public use files, neurodiagnostics and IONM providers won 84.7 percent of decided disputes, with a median award of about 34 times the qualifying payment amount across decided line items, among the highest multiples of any specialty. The median decision took 31 days.
Why are IONM award multiples so high?
Because IONM qualifying payment amounts are tiny relative to what arbitrators accept. In 2025, somatosensory evoked potentials (95938) carried a median QPA of $58 and a median decided award of $2,800. The multiple is a measurement of how far payer benchmarks sit below the accepted market for monitoring.
Can a patient consent form waive IONM protection?
No. The No Surprises Act bars consent waivers for ancillary and diagnostic services, and intraoperative neuromonitoring is a diagnostic service furnished by a clinician the patient never selects. Protected IONM claims stay protected regardless of intake paperwork.
What does it cost an IONM group to file?
A $15 administrative fee per party per dispute, plus a certified IDR entity fee of a few hundred dollars refunded to the winner. Contingency vendors typically take 15 to 25 percent of recovery; Lido IDR charges a flat fee per arbitration.
Talk through your numbers
Book 30 minutes with an NSA/IDR specialist. Bring your payer mix and rough out-of-network claim volume, and we will walk through which claims are eligible, what similar providers are winning at IDR, and what a flat fee arrangement looks like. Three quick questions, then pick a time.
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