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Newhouse, J.P. et al.

Joseph P. Newhouse, Jie Huang, Richard J. Brand, Vicki Fung, John T. Hsu,

The structure of risk adjustment for private plans in Medicare.

Medicare bases its risk adjustment method for Medicare Advantage plan payment on the relative costs of treating various diagnoses in traditional Medicare. However, there are many reasons to doubt that the relative cost of treating different diagnoses is similar between Medicare Advantage plans and traditional Medicare, including the varying applicability of care management methods to different diagnoses and the varying degrees of market power among suppliers of services to plans. We use internal cost data from a large health plan to compare its cost of treating various diagnoses with Medicare's reimbursement. We find substantial variability across diagnoses, implying that the current risk adjustment system creates incentives for Medicare Advantage plans to favor beneficiaries with certain diagnoses, but find no consistent relationship between the costliness of the diagnosis and the difference between reimbursement and cost.[1]

References

The structure of risk adjustment for private plans in Medicare. Newhouse, J.P., Huang, J., Brand, R.J., Fung, V., Hsu, J.T. Am. J. Manag. Care (2011) [Pubmed]

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