Federal IDR outcomes: Anesthesiology in Illinois
In 2025 Q1–Q4, the provider or facility offer prevailed in 90.3% of 2,879 determined Federal IDR dispute line items for anesthesiology in Illinois. The median prevailing offer was 5.40x the QPA (25th–75th percentile 1.80x–13.15x; n = 2,872). The median time to a decision was 28 business days (n = 2,879).
Determined line items
2,879
2025 Q1–Q4 · 0 split decisions excluded
Provider win rate
90.3%
n = 2,879 · 2025 Q1–Q4
Median payment vs QPA
5.40x
middle half 1.80x–13.15x · n = 2,872 · 2025 Q1–Q4
Median days to decision
28
business days, from dispute initiation · n = 2,879 · 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 | 2,879 | 90.3% | 5.40x | 1.80x–13.15x | 2,872 | 28 |
| 2024 Q1–Q4 | 125 | 85.6% | 1.52x | 1.43x–1.64x | 125 | 28 |
| 2023 Q1–Q4 | Fewer than 30 determined line items; not shown. | |||||
| 2023 Q1–2025 Q4 | 3,019 | 89.9% | 4.36x | 1.71x–11.44x | 3,012 | 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 |
|---|---|---|---|---|---|
| 00812 Anesthesia for exam of colon using an endoscope | 486 | 95.7% | 6.42x | 484 | 31 |
| 00813 Anesthesia for procedure on small and large bowel using an endoscope | 219 | 92.2% | 6.78x | 218 | 26 |
| 00731 Anesthesia for other procedure on esophagus, stomach, or upper small bowel using | 217 | 93.5% | 7.76x | 217 | 26 |
| 00811 Anesthesia for other procedure on large bowel using an endoscope | 179 | 92.2% | 1.91x | 177 | 31 |
| 00840 Anesthesia for other procedure on lower abdomen | 151 | 94.7% | 6.13x | 151 | 29 |
| 00790 Anesthesia for other procedure on upper abdomen | 112 | 92.9% | 6.28x | 112 | 26 |
| 01967 Anesthesia for labor during planned vaginal delivery | 109 | 91.7% | 4.91x | 109 | 23 |
| 00952 Anesthesia for exam of uterus using an endoscope | 75 | 88.0% | 6.96x | 74 | 33 |
| 01961 Anesthesia for cesarean delivery | 74 | 77.0% | 4.06x | 74 | 25 |
| 00400 Anesthesia for other procedure on skin of arms, legs, and front body | 61 | 93.4% | 6.34x | 61 | 27 |
| 01480 Anesthesia for other procedure on lower leg, ankle, and foot bones | 60 | 85.0% | 3.78x | 60 | 26 |
| 00902 Anesthesia for procedure on anus and rectum | 47 | 85.1% | 8.28x | 47 | 22 |
| 00300 Anesthesia for other procedure on skin, muscles, or nerves of head, neck, and up | 44 | 90.9% | 3.66x | 44 | 29 |
| 00142 Anesthesia for lens surgery | 42 | 92.9% | 4.62x | 42 | 21.5 |
| 01400 Anesthesia for other procedure or exam of knee joint using an endoscope | 41 | 95.1% | 3.47x | 40 | 27 |
| 00170 Anesthesia for other procedure on mouth | 40 | 80.0% | 1.78x | 40 | 46 |
| 00910 Anesthesia for other procedure on urinary system through urethra | 40 | 77.5% | 7.48x | 40 | 26 |
| 01402 Anesthesia for procedure for total knee joint replacement | 40 | 87.5% | 1.50x | 40 | 31 |
| 00940 Anesthesia for other procedure on female genitals | 38 | 92.1% | 9.13x | 38 | 34.5 |
| 01810 Anesthesia for procedure on nerves, muscles, tendons, and tissue of forearm, wri | 37 | 83.8% | 1.76x | 37 | 31 |
2025 Q1–Q4 · rows with n ≥ 30 determined line items · sorted by n.
Related: all specialties in Illinois · Anesthesiology in all states
FAQ
What is the Federal IDR provider win rate for anesthesiology in Illinois?
In 2025 Q1–Q4, the provider or facility offer was selected in 90.3% of 2,879 determined dispute line items for anesthesiology in Illinois. 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 anesthesiology in Illinois?
In 2025 Q1–Q4, the median prevailing offer was 5.40x the qualifying payment amount (QPA), with a 25th to 75th percentile range of 1.80x to 13.15x (n = 2,872 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 anesthesiology in Illinois?
In 2025 Q1–Q4, the median was 28 business days (n = 2,879 line items), using the CMS field Length of Time to Make Determination (from dispute initiation).