Section 484.370 - Process for determining and applying the value-based payment adjustment under the Expanded Home Health Value-Based Purchasing (HHVBP) Model(a)General. Competing home health agencies are ranked within the larger-volume and smaller-volume cohorts nationwide based on the performance standards in this part that apply to the expanded HHVBP Model, and CMS makes value-based payment adjustments to the competing HHAs as specified in this section.(b)Calculation of the value-based payment adjustment amount. The value-based payment adjustment amount is calculated by multiplying the home health prospective payment final claim payment amount as calculated in accordance with § 484.205 by the payment adjustment percentage.(c)Calculation of the payment adjustment percentage. The payment adjustment percentage is calculated as the product of all of the following: (1) The applicable percent as defined in § 484.345 .(2) The competing HHA's Total Performance Score divided by 100.(3) The linear exchange function slope. 86 FR 62422 , Nov. 9, 2021, as amended at 87 FR 66887 , Nov. 4, 2022 86 FR 62240 , 1/1/2022; 87 FR 66887 , 1/1/2023