Statistical Profile — NORTHWESTERN MEMORIAL HOSPITAL
CCN 140281 | COOK, IL | 6 outlier flags
🛡️ Public data only — no PHI permitted on this instance.
930
Beds
$2.38B
Net Revenue
-18.4%
Op Margin
93.6%
Occupancy
6
Outlier Flags
Statistical Outliers (6)
Metrics where this hospital is >2 standard deviations from the national mean. Investigate in diligence — could signal operational issues or data quality problems.
- Beds: +4.4σ above national mean
- Net Patient Revenue: +4.6σ above national mean
- Operating Expenses: +5.3σ above national mean
- Net Income: -3.0σ below national mean
- Gross Patient Revenue: +5.3σ above national mean
- Total Patient Days: +5.2σ above national mean
Statistical Profile — All Variables
Each metric compared to national (n=6,123) and IL (n=208) peers. Z-score shows standard deviations from national mean.
| Metric | Hospital | Nat'l Median | IL Median | Z-Score | Nat'l %ile | State %ile |
|---|---|---|---|---|---|---|
| Beds | 930 | 63 | 110 | +4.36σ | P99 ▲ | P100 ▲ |
| Net Patient Revenue | $2.38B | $59.7M | $87.9M | +4.63σ | P99 ▲ | P99 ▲ |
| Operating Expenses | $2.82B | $62.7M | $99.1M | +5.33σ | P99 ▲ | P100 ▲ |
| Net Income | $-437.5M | $-2.1M | $-4.0M | -2.95σ | P1 ▼ | P0 ▼ |
| Gross Patient Revenue | $10.98B | $186.6M | $329.5M | +5.29σ | P99 ▲ | P99 ▲ |
| Total Patient Days | 299,032 | 12,073 | 16,983 | +5.20σ | P99 ▲ | P100 ▲ |
| Medicare Day % | 23.5% | 30.9% | 35.8% | -0.52σ | P32 | P20 |
| Medicaid Day % | 5.1% | 5.1% | 3.5% | -0.35σ | P50 | P63 |
| Operating Margin | -18.4% | -4.8% | -5.3% | -0.59σ | P22 | P22 |
| Revenue per Bed | $2.6M | $1.2M | $1.4M | +0.56σ | P87 | P88 |
| Occupancy Rate | 93.6% | 53.7% | 48.0% | +1.65σ | P97 ▲ | P99 ▲ |
| Commercial Payer % | 71.4% | 61.2% | 60.2% | +0.60σ | P73 | P78 |
| Net-to-Gross Ratio | 21.7% | 33.3% | 31.2% | -0.80σ | P22 | P20 |
| Expense per Bed | $3.0M | $1.2M | $1.4M | +0.60σ | P91 ▲ | P93 ▲ |
| Revenue per Patient Day | 7,960 | 7,054 | 8,284 | -0.05σ | P55 | P49 |
| Payer Diversity Index | 0.432 | 0.473 | 0.485 | -0.03σ | P35 | P25 |
Multi-Variable Regression Residuals
For each key metric, the national regression model predicts a value. The residual shows how much this hospital over/under-performs after controlling for all other variables.
| Target | Model R² | Actual | Predicted | Residual |
|---|---|---|---|---|
| Net Patient Revenue | 74.0% | $2.38B | $2.45B | -0.26σ |
| Operating Margin | 2.1% | -0.1838 | -0.0103 | -0.91σ |
| Occupancy Rate | 44.3% | 0.9363 | 1.3954 | -2.52σ |
| Revenue Per Bed | 2.6% | $2.6M | $3.2M | -0.36σ |
| Net To Gross Ratio | 22.4% | 0.2169 | 0.3162 | -0.57σ |