The Centers for Medicare & Medicaid Services (“CMS”) released the final rule on risk adjustment data validation (“RADV”) audits of Medicare Advantage (“MA”) organizations (the “Final Rule”) on January 30, 2023. Among other changes, this Final Rule will allow CMS to audit a sample of an MA organization’s (“MAO”) diagnoses reported for risk adjustment purposes (from 2018 and later) and then use the audit findings to calculate an extrapolated improper payment amount for the MAO’s contract. This extrapolation technique is controversial for a number of reasons, including whether CMS has the authority to use it in the manner proposed in the Final Rule, and whether it is an actuarially sound method of auditing. As we predicted in February, this Final Rule is now being challenged in court.…

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