Federal IDR outcomes: Intraoperative neuromonitoring in California
In 2025 Q1–Q4, the provider or facility offer prevailed in 87.5% of 4,935 determined Federal IDR dispute line items for intraoperative neuromonitoring in California. The median prevailing offer was 17.12x the QPA (25th–75th percentile 6.22x–41.58x; n = 4,320). The median time to a decision was 36 business days (n = 4,935).
Determined line items
4,935
2025 Q1–Q4 · 4 split decisions excluded
Provider win rate
87.5%
n = 4,935 · 2025 Q1–Q4
Median payment vs QPA
17.12x
middle half 6.22x–41.58x · n = 4,320 · 2025 Q1–Q4
Median days to decision
36
business days, from dispute initiation · n = 4,935 · 2025 Q1–Q4
Dollar amounts are not shown for specialty groups: the CMS QPA and Offers file, the only source of dollar figures, has no specialty field. See methodology.
By period
| Period | Line items | Win % | Median ×QPA | 25th–75th | Ratio n | Median days |
|---|---|---|---|---|---|---|
| 2025 Q1–Q4 | 4,935 | 87.5% | 17.12x | 6.22x–41.58x | 4,320 | 36 |
| 2024 Q1–Q4 | 2,324 | 88.5% | 12.70x | 4.72x–22.22x | 2,223 | 83 |
| 2023 Q1–Q4 | 162 | 77.8% | 13.40x | 2.43x–23.83x | 151 | 86 |
| 2023 Q1–2025 Q4 | 7,421 | 87.6% | 14.99x | 5.54x–32.51x | 6,694 | not pooled |
Line items = determined dispute line items (n). Win rate excludes split decisions and includes default decisions. Ratio n = line items reporting a payment-to-QPA ratio. Days are business days as reported by CMS (2023–2024: from IDR entity assignment; 2025: from initiation) and are never pooled.
Most disputed CPT codes
| CPT code | Line items | Win % | Median ×QPA | Ratio n | Median days |
|---|---|---|---|---|---|
| 95938 Placement of skin electrodes and measurement of stimulated sites on arms and leg | 1,344 | 88.5% | 29.03x † | 1,193 | 35 |
| 95941 Continuous remote monitoring of nervous system during operation, each hour | 1,062 | 85.8% | 11.36x | 924 | 37 |
| 95939 Placement of skin electrodes and measurement of central motor stimulation in arm | 644 | 86.5% | 13.48x | 589 | 35 |
| 95861 Needle measurement of electrical activity in arm or leg muscles, 2 extremities | 403 | 87.8% | 19.51x | 325 | 32 |
| 95870 Needle measurement of electrical activity in arm, leg, trunk or head muscles, li | 198 | 87.9% | 11.58x | 162 | 36 |
| 95955 Measurement of brain wave activity (EEG) outside the brain during surgery | 182 | 83.5% | 37.42x † | 180 | 47.5 |
| 95813 Measurement of brain wave activity (EEG), 61-119 minutes | 176 | 89.8% | 29.49x † | 127 | 29 |
| 95937 Testing of nerve-muscle junction | 174 | 85.6% | 56.77x † | 153 | 35 |
| 95940 Continuous monitoring of nervous system during operation, each 15 minutes | 82 | 84.1% | 2.42x | 82 | 50 |
| 95886 Needle measurement of electrical activity in arm or leg muscles, complete study | 69 | 89.9% | 34.74x † | 61 | 34 |
| 95908 Nerve conduction, 3-4 studies | 39 | 87.2% | 20.31x † | 36 | 37 |
| 95717 Measurement of brain wave activity (EEG), 2-12 hours with health care profession | 36 | 94.4% | – | 21 | 35.5 |
| 95865 Needle measurement of electrical activity in voice box muscles | 36 | 88.9% | 28.64x † | 30 | 38.5 |
| 95885 Needle measurement of electrical activity in arm or leg muscles, limited study | 33 | 87.9% | – | 26 | 41 |
| 95929 Placement of skin electrodes and measurement of central motor stimulation in leg | 31 | 96.8% | – | 25 | 37 |
2025 Q1–Q4 · rows with n ≥ 30 determined line items · sorted by n.
Related: all specialties in California · Intraoperative neuromonitoring in all states
FAQ
What is the Federal IDR provider win rate for intraoperative neuromonitoring in California?
In 2025 Q1–Q4, the provider or facility offer was selected in 87.5% of 4,935 determined dispute line items for intraoperative neuromonitoring in California. Split decisions are excluded from the denominator and default decisions are included. Withdrawn, settled and ineligible disputes are not in the CMS data.
How do Federal IDR payments compare with the QPA for intraoperative neuromonitoring in California?
In 2025 Q1–Q4, the median prevailing offer was 17.12x the qualifying payment amount (QPA), with a 25th to 75th percentile range of 6.22x to 41.58x (n = 4,320 line items). This uses the CMS field Prevailing Party Offer as % of QPA, where 1.00x equals the QPA.
How long do Federal IDR decisions take for intraoperative neuromonitoring in California?
In 2025 Q1–Q4, the median was 36 business days (n = 4,935 line items), using the CMS field Length of Time to Make Determination (from dispute initiation).