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§ 484.220 Calculation of the case-mix and wage area adjusted prospective payment rates.
CMS adjusts the national, standardized prospective payment rates as referenced in § 484.215 to account for the following:
(a) HHA case-mix using a case-mix index to explain the relative resource utilization of different patients. To address changes to the case-mix that are a result of changes in the coding or classification of different units of service that do not reflect real changes in case-mix, the national, standardized prospective payment rate will be adjusted downward as follows: