Commercial negotiated rates for inpatient services exhibit substantial variation both within and across hospital markets, yet the magnitude and drivers of this variation have been difficult to quantify prior to the availability of machine-readable file data. This study analyzes commercial rates for the fifty highest-volume DRGs across the one hundred largest Core-Based Statistical Areas, constructing a CBSA-level benchmarking dataset that enables systematic comparison of rate distributions, inter-quartile spreads, and market-level concentration effects. The methodology incorporates ghost rate exclusion filters, payer-mix normalization to control for product type variation, and outlier trimming at the 2.5th and 97.5th percentiles to produce stable distributional estimates suitable for strategic planning applications.
The findings reveal that rate dispersion — measured as the ratio of the 75th to 25th percentile negotiated rate within a CBSA — exceeds 1.6x for the majority of high-volume DRGs and reaches 2.5x or higher for surgical categories in competitive multi-system markets. Markets with higher hospital concentration, as measured by the Herfindahl-Hirschman Index, exhibit significantly higher median rates but paradoxically narrower within-market dispersion, consistent with theoretical predictions that concentrated provider markets negotiate from a stronger position with uniform leverage across payer types. Conversely, fragmented markets with many independent hospitals show lower median rates but wider dispersion, indicating greater heterogeneity in individual hospitals’ negotiating outcomes. These patterns have direct implications for how payers and employers should interpret their own contract positioning relative to local and national benchmarks.
The implications for market participants are significant. Payers conducting network strategy reviews should evaluate whether their contracted rates fall within or outside the inter-quartile range for each CBSA, with particular attention to high-volume DRGs that drive the majority of inpatient spend. Health systems entering contract renegotiations can use market-level rate distributions to identify the positioning they are likely to achieve given their market share and case mix. Life sciences and investor clients assessing market dynamics can use CBSA-level rate trends as a leading indicator of hospital system financial performance and competitive positioning. The dataset and methodology described in this paper form the analytical foundation for the Simple Healthcare benchmarking platform.