Federal IDR outcomes: Radiology in Illinois
In 2025 Q1–Q4, the provider or facility offer prevailed in 94.7% of 9,908 determined Federal IDR dispute line items for radiology in Illinois. The median prevailing offer was 5.40x the QPA (25th–75th percentile 3.33x–6.82x; n = 9,908). The median time to a decision was 42 business days (n = 9,908).
Determined line items
9,908
2025 Q1–Q4 · 30 split decisions excluded
Provider win rate
94.7%
n = 9,908 · 2025 Q1–Q4
Median payment vs QPA
5.40x
middle half 3.33x–6.82x · n = 9,908 · 2025 Q1–Q4
Median days to decision
42
business days, from dispute initiation · n = 9,908 · 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 | 9,908 | 94.7% | 5.40x | 3.33x–6.82x | 9,908 | 42 |
| 2024 Q1–Q4 | 5,119 | 95.2% | 6.45x | 4.31x–8.27x | 5,102 | 49 |
| 2023 Q1–Q4 | 991 | 80.5% | 6.57x | 3.81x–8.14x | 969 | 74 |
| 2023 Q1–2025 Q4 | 16,018 | 94.0% | 5.67x | 3.63x–7.25x | 15,979 | 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 |
|---|---|---|---|---|---|
| 77063 Screening 3D breast mammography | 1,181 | 97.1% | 2.57x | 1,181 | 44 |
| 77067 Screening mammography | 1,181 | 97.3% | 2.99x | 1,181 | 44 |
| 71046 X-ray of chest, 2 views | 671 | 92.8% | 7.42x | 671 | 50 |
| 76642 Limited ultrasound scan of 1 breast | 300 | 95.7% | 5.46x | 300 | 32 |
| 74177 CT scan of abdomen and pelvis with contrast | 299 | 96.7% | 7.08x | 299 | 49 |
| 71045 X-ray of chest, 1 view | 284 | 77.8% | 7.40x | 284 | 168 |
| 70450 CT scan head or brain without contrast | 260 | 93.1% | 5.60x | 260 | 50.5 |
| 76705 Limited ultrasound scan of abdomen | 234 | 91.5% | 6.05x | 234 | 28.5 |
| 71275 CT scan of blood vessels of chest with contrast | 208 | 90.9% | 6.53x | 208 | 37 |
| 72125 CT scan of upper spine without contrast | 141 | 96.5% | 5.00x | 141 | 38 |
| 73630 X-ray of foot, minimum of 3 views | 141 | 92.2% | 5.89x | 141 | 45 |
| 74176 CT scan of abdomen and pelvis without contrast | 135 | 93.3% | 6.70x | 135 | 51 |
| 76856 Complete ultrasound scan of pelvis | 133 | 92.5% | 4.80x | 133 | 28 |
| 93971 Ultrasound study of one arm or leg veins with compression and maneuvers | 125 | 96.0% | 7.22x | 125 | 19 |
| 70553 MRI scan of brain before and after contrast | 118 | 94.1% | 5.28x | 118 | 37.5 |
| 73130 X-ray of hand, minimum of 3 views | 115 | 93.9% | 5.73x | 115 | 53 |
| 74018 X-ray of abdomen, 1 view | 114 | 96.5% | 9.90x | 114 | 53 |
| 73030 X-ray of shoulder, minimum of 2 views | 113 | 92.9% | 6.09x | 113 | 49 |
| 77066 Diagnostic mammography of both breasts | 110 | 95.5% | 3.26x | 110 | 43 |
| 73562 X-ray of knee, 3 views | 107 | 93.5% | 6.04x | 107 | 51 |
2025 Q1–Q4 · rows with n ≥ 30 determined line items · sorted by n.
Related: all specialties in Illinois · Radiology in all states
FAQ
What is the Federal IDR provider win rate for radiology in Illinois?
In 2025 Q1–Q4, the provider or facility offer was selected in 94.7% of 9,908 determined dispute line items for radiology 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 radiology 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 3.33x to 6.82x (n = 9,908 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 radiology in Illinois?
In 2025 Q1–Q4, the median was 42 business days (n = 9,908 line items), using the CMS field Length of Time to Make Determination (from dispute initiation).