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Unrecognized redistributions of revenue in diagnosis-related group-based prospective payment systems
Abstract:
The Medicare prospective payment system, which is based on the diagnosis-related group patient-classification system, identifies previously unrecognized redistributions of revenue among diagnosis-related groups and hospitals. The redistributions are caused by two artifacts. One artifact results from the use of labor market indexes to adjust costs for the different prices paid by hospitals in different labor markets. The other artifact results from the use of averages that are based on the number of hospitals, not the number of patients, to calculate payment rates from average costs. The effects of these artifacts in a sample data set have been measured, and it was concluded that they lead to discrepancies between costs and payments that may affect hospital incentives--the overall payment for each diagnosis-related group--and Medicare's total payment.
Insights
Medicare prospective payment system revenue redistributions are caused by artifacts in cost adjustment and payment rate calculations. These issues create discrepancies between hospital costs and Medicare payments, potentially impacting incentives and overall program spending.
Area of Science:
- Health Economics
- Healthcare Policy
- Medical Billing
Background:
- The Medicare prospective payment system (PPS) utilizes diagnosis-related groups (DRGs) for patient classification and reimbursement.
- Previous analyses have not fully identified revenue shifts within DRGs and hospitals under PPS.
- Understanding these shifts is crucial for evaluating the financial sustainability and fairness of Medicare reimbursement.
Purpose of the Study:
- To identify and quantify previously unrecognized revenue redistributions within the Medicare PPS.
- To investigate the specific artifacts causing these redistributions.
- To assess the impact of these artifacts on hospital financial incentives and Medicare's total payments.
Main Methods:
- Analysis of a sample Medicare data set to measure revenue redistributions.
- Identification of two primary artifacts affecting cost adjustments and payment rate calculations.
- Quantification of discrepancies between hospital costs and Medicare payments resulting from these artifacts.
Main Results:
- The study identified significant, previously unrecognized revenue redistributions among DRGs and hospitals.
- Two key artifacts were pinpointed: labor market index adjustments and the use of hospital-based rather than patient-based averages for payment rates.
- These artifacts lead to discrepancies between actual costs and Medicare payments.
Conclusions:
- Artifacts within the Medicare PPS lead to substantial revenue redistributions.
- These discrepancies can distort hospital financial incentives and affect Medicare's overall expenditures.
- Revisions to the PPS methodology may be necessary to ensure accurate cost-based reimbursement and appropriate incentives.