We examined the relationship between variations in intra-DRG severity of illness classifications and hospital profitability. Unlike in previous studies, we created a direct hospital-level measure of severity, formed from MedisGroup severity scores. We estimated separate regression equations for total margin, operating margin, net revenue per admission, and expense per admission. We examined data for 201 Pennsylvania hospitals and found that hospital profits were inversely related to the severity of illness index. Expense per admission was positively related to severity; however the relationship between severity and net revenue per admission was not significant. The results suggest that hospitals with a more severe case mix may not recover the full costs of providing services. Thus payment reform should include adjustments for severity of illness.
The Impact of Intra-Drg Severity of Illness on Hospital Profitability: Implications for Payment Reform
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Michael D. Rosko, Caryl E. Carpenter; The Impact of Intra-Drg Severity of Illness on Hospital Profitability: Implications for Payment Reform. J Health Polit Policy Law 1 August 1994; 19 (4): 729–751. doi: https://doi.org/10.1215/03616878-19-4-729
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