Federal IDR outcomes: Neurosurgery and spine surgery in Washington
In 2025 Q1–Q4, the provider or facility offer prevailed in 83.8% of 105 determined Federal IDR dispute line items for neurosurgery and spine surgery in Washington. The median prevailing offer was 61.38x the QPA (25th–75th percentile 28.27x–180.24x; n = 105). The median time to a decision was 26 business days (n = 105).
Determined line items
105
2025 Q1–Q4 · 0 split decisions excluded
Provider win rate
83.8%
n = 105 · 2025 Q1–Q4
Median days to decision
26
business days, from dispute initiation · n = 105 · 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 | 105 | 83.8% | 61.38x † | 28.27x–180.24x | 105 | 26 |
| 2024 Q1–Q4 | Fewer than 30 determined line items; not shown. | |||||
| 2023 Q1–Q4 | Fewer than 30 determined line items; not shown. | |||||
| 2023 Q1–2025 Q4 | 105 | 83.8% | 61.38x † | 28.27x–180.24x | 105 | 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
No row has 30 or more determined line items in 2025 Q1–Q4.
Related: all specialties in Washington · Neurosurgery and spine surgery in all states
FAQ
What is the Federal IDR provider win rate for neurosurgery and spine surgery in Washington?
In 2025 Q1–Q4, the provider or facility offer was selected in 83.8% of 105 determined dispute line items for neurosurgery and spine surgery in Washington. 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 Withdrawn, settled and ineligible disputes are not in the CMS data.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 neurosurgery and spine surgery in Washington?
In 2025 Q1–Q4, the median prevailing offer was 61.38x the qualifying payment amount (QPA), with a 25th to 75th percentile range of 28.27x to 180.24x (n = 105 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 neurosurgery and spine surgery in Washington?
In 2025 Q1–Q4, the median was 26 business days (n = 105 line items), using the CMS field Length of Time to Make Determination (from dispute initiation).