Federal IDR outcomes: Internal and family medicine in Illinois
In 2025 Q1–Q4, the provider or facility offer prevailed in 91.5% of 130 determined Federal IDR dispute line items for internal and family medicine in Illinois. The median prevailing offer was 6.48x the QPA (25th–75th percentile 3.83x–9.79x; n = 130). The median time to a decision was 65 business days (n = 130).
Determined line items
130
2025 Q1–Q4 · 0 split decisions excluded
Provider win rate
91.5%
n = 130 · 2025 Q1–Q4
Median payment vs QPA
6.48x
middle half 3.83x–9.79x · n = 130 · 2025 Q1–Q4
Median days to decision
65
business days, from dispute initiation · n = 130 · 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 | 130 | 91.5% | 6.48x | 3.83x–9.79x | 130 | 65 |
| 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 | 146 | 89.7% | 6.54x | 3.42x–9.79x | 146 | 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 |
|---|---|---|---|---|---|
| 99284 Emergency department visit with moderate level of medical decision making | 34 | 100.0% | 11.17x | 34 | 170 |
2025 Q1–Q4 · rows with n ≥ 30 determined line items · sorted by n.
Related: all specialties in Illinois · Internal and family medicine in all states
FAQ
What is the Federal IDR provider win rate for internal and family medicine in Illinois?
In 2025 Q1–Q4, the provider or facility offer was selected in 91.5% of 130 determined dispute line items for internal and family medicine 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 Withdrawn, settled and ineligible disputes are not in the CMS data.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 internal and family medicine in Illinois?
In 2025 Q1–Q4, the median prevailing offer was 6.48x the qualifying payment amount (QPA), with a 25th to 75th percentile range of 3.83x to 9.79x (n = 130 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 internal and family medicine in Illinois?
In 2025 Q1–Q4, the median was 65 business days (n = 130 line items), using the CMS field Length of Time to Make Determination (from dispute initiation).